Explore topic-wise InterviewSolutions in Current Affairs.

a. Percentage of sales of fruits in India in 2015

b. Bananas

c. ii) Guavas

d. iii) 42%

e. iii) The banana is the best selling fruit.

Tenali. 

22.4.20xx. 

Dear Suneeth, 

I’m doing very well here. I expect you are all fine and that you are also doing very well. What lesson is going for you in English. For us the first lesson ‘The Town Mouse and The Country Mouse’ has just been completed. There is a lot of message in that lesson. The lesson teachers us how the cities and cities have become uninhabitable (un-livable) these days. From the lesson we can understand that there is a lot of noisy and pollution in cities. Lakhs of vehicles and hundreds of factories emit out a lot of poisonous gases in towns and cities. Not only that the city life is not that much peaceful because of terroristic activities and other vulnerable conditions.

But unlike these uninhabitable conditions in the cities, villages are peaceful and calm. Though there are no comforts and luxuries in villages, there is a lot of peace and serenity in villages. In villages we can enjoy fresh and clean environment. People in villages are amiable, innocent and helpful. They are sympathetic with others. Hence I too feel that the villages are habitable in all respects.

I think the lesson has been completed for you. Write your feelings about the lesson. Please convey my regards to your parents and best wishes to your sister. 

Yours lovingly, 

xxxxxx

Address on the Envelope: 

E. Vineeth. 

H.No.: 1-27-30/1, 

Kothapet, 

Tenali, 

Guntur (dt).

I had a lot of inconvenience in the train journey to Mouse Country. The train moved slowly. The day was bright and sunny and soon I began to feel hot in the train. The train was dreadful. It was an ordinary train. I felt terribly hot and thirsty. I wished there’was an airconditioned coach. I felt very uncomfortable in the train.

a) that there was no breakfast ready 

b) in a neary by farm 

c) The town mouse used to have varieties of ready made and delicious food in the town. But now here in the countryside it has to go the fields in search of raw food. So the town mouse wanted to go home. 

d) The town mouse told that he suddenly remembered that he had forgotten something. 

e) root and sugarcane

The Low level or Procedural DML can specify and retrieve each record from a set of records. This retrieve of a record is said to be Record-at-a-time.

B) Why do you like America?

a) The country mouse sent the invitation to the town mouse. 

b) The town mouse was going to the countryside by a train, 

c) The weather was very hot. 

d) The town mouse wished to have an air conditioned coach. 

e) In the town the town mouse used to live with all comforts such as air condition. He was unable to withstand the heat of the sun. So he wished to have an air-conditioned coach.

It interprets DDL statements and record them in tables containing metadata.

a) The town mouse sent the letter to the country mouse. 

b) The country mouse lives in the mouse hole in Mouse Country. 

c) The town mouse lives in kitchen cupboard in Mouse Town. 

d) The country mouse and the town mouse are cousins. 

e) The town mouse wants to stay for a week in the country. 

f) The town mouse had been suffering from cough and cold and his doctor advised him to spend a week in the countryside.

a) The mice had to go to the nearby farm to search for food. 

b) They might get a nice piece of root or a tender bit of sugar-cane for their breakfast. 

c) The town mouse did not like the style of living.in the countryside. He was unable to adjust to the ways of the village. So he wanted to go back to the town. 

d) The country mouse wrote that he was very much worried about his sick cousin. He said that he would like to visit his cousin to see whether he was alright. 

e) It suggests us that in town the life of people is very busy.

a) In the country the mice had to search for food which was raw and traditional but in the town variety of food was readily available, cooked and delicious. 

b) The town mouse lived at the back of the cupboard. 

c) The sound came from the opening of the cupboard door. 

d) No. They were not really safe. They had to run for safety every time the door of the cupboard was opened. 

e) The country mouse got quite tired of running and hiding. Though he did not get much food in the country he could live peacefully and safely there.

a) The country mouse used to eat raw food like roots and sugar-cane. 

b) ‘I am afraid’ here means ‘sorry’. It is used to express apology; 

c) The country mouse used to sleep on the ground. 

d) The town mouse worried why it was so quiet in the country, why there were no radios and televisions, why there were no cars and lorries, in the country. 

e) There was no delicious food such as bread, jam, fruits and chocolates in the country. There was no comfortable bed to sleep There were no buses and lorries and there was no busy life in the country. Hence the town mouse did not like the country.

It executes low-level instruction generated by compiler.

a) The country mouse was surprised by the noise and lights in the town. 

b) The noise came from the traffic. This noise was made by buses, lorries, cars and aeroplanes. 

c) His village was very peaceful. There was no traffic in the country. There were no buses, lorries, cars and aeroplanes in the village. 

d) The town mouse offered his cousin ice-cold lemonade, orange juice. 

e) In the town a lot of delicious food was available, but in the village every time they were hungry they had to search for food here and there.

a) The day was very bright and sunny when the town mouse travelled to the country. 

b) It tells us that the town mouse was leading a luxurious, comfortable and civilised life in the town with all modern amenities and comforts. 

c) The town mouse felt that the train was dreadful. He felt very hot and thirsty in the train.

d) The country mouse offered some water or coconut water to the town mouse as soon as he got off the train.

e) The town mouse asked the country mouse for orange juice or lemonade.

1. a) mouse b) cousins 

2. a) please b) early 

3. a) soon b) train 

4. a) air-conditioned b)coach c) feel 

5. a) found b) root

6. a) Root b) exclaimed 

7. a) waiting b) station 

8. a) eat b) food 

9. a) sleep b) ground 

10. a) quiet b) lorries 

11. a) radios b) televisions 

12. a) nearby b) search 

13. a) dread ful b) noise 

14. a) received b) read 

15. a) quite b) cheerful 

16. a) cupboard b) door

It translates DML statements in a query language into low-level instruction that the query evaluation engine can understand.

1. a) beating 

b) silent 

c) cheerful 

d) opening

2. a) run 

b) safety 

c) tired 

d) hiding

3. a) organise 

b) clean 

c) painting 

d) live

4. a) hole 

b) Wait

This language that enable user to access or manipulate data as organised by appropriate data model.

1. Procedural DML or Low level: DML requires a user to specify what data are needed and how to get those data.

2. Non-Procedural DML or High level: DML requires a user to specify what data are needed without specifying how to get those data.

Importance of sports and games in schools: Right from our childhood till our adulthood we have been taught the truth – work while you work; play while you play; that, is the way to be happy and gay. In recognition of this truth, in schools sports and games are given a lot of importance. Only when children have physical activities coupled with academic pursuits their education can be considered complete.

Sports and games can be divided into athletics and team games. If athletics are individual events sharpening the spirit of competition, team games teach players the spirit of working together. Values of cooperation, adjustment and sacrifice are taught through team games.

In the present time when children have become victims of passive forms of entertainment through T.V. and computer, sports and games in schools are the only physical activity that the children get. The scenario has further increased the importance of sports and games in schools.

Sports and games in schools also tap the hidden potential of youngsters. Not all can be academically brilliant. Some may have their strength in other spheres. If their abilities are recognized and channelled into skills, these may shine as stars eventually.

Festivals 

Festival are part of one's custom, culture and tradition. Every festival belonging to any religion comes to us with all pleasures, ceremonies and charm. Each festival has got its own importance. It may belong to any religion, but we have derive our pleasures in it. In every festival delicious food is prepared at home. Diwali is the most prominent of Hindu festivals. It is the festival of lights. On this day Hindus celebrate the return of Lord Ram to Ayodhya after the victory over Ravana. 

Ram Navami is celebrated as the birthday of Lord Ram. Durga Puja is famous festival. Goddess Durga is worshipped for five days. Holi is a festival of colour. People through colour on one another. Eid is famous festival of Muslim. Christmas is the most important festival of Christians. It is celebrated as the birthday of Lord Jesus on 25th of December. Festival should be celebrated with simplicity. People belonging to other communities should be invited during religious festivals. This will help in promoting national integration and communal harmony.

Uses/Importance of forests:Forests are nature’s gift to mankind. They are of multifarious uses and as such are considered to be of immense help to human beings. They moderate the climate, maintain soil mantle, and regulate water supplies. By their photosynthetic activity, the plants take carbon dioxide from the atmosphere and release oxygen thus purifying the air and also convert solar energy into various forms of energy such as fuel, food, oil and oil products, which can be directly used by human beings.

Forests have a great potential to control rainfall and contribute largely towards moderation of flow of water in the catchment areas. They also offer protection to soil against erosion by wind and water.

The ecological usefulness of forests is most readily observed in their beneficial effect on water catchment areas, where they have a regulatory influence on streamflow and where they protect soils from erosion and prevent silting of dams and canals. Forests also play a significant role in economic development.

In addition to their important influence on the environment, they provide innumerable products of vital use to man. Forest products are extensively used in most societies; they provide food, fuel, fibre, building materials, and industrial products such as gums, resins, oils, transmission poles, newsprint and other papers, packaging materials, textiles and clothing. Almost every modern industry is, to some extent, dependent on forest products in one or more of its processes.

The storage structures and access methods used by database system are specified by a set of definition in a special type of DDL called data storage-definition language.

Introduction :

Sports are generally liked by everyone especially kids however it may harm them in many ways. Kids can be easily injured and deviated from their study. However, kids love to go outside and play sports or games with their friends. If we have a look on the history, we see that sports are given much importance from the ancient time.

In the modern time, growing popularity of other entertainment things like video games, television, etc are decreasing the demand’of sports and games in the life. However* it is also true that sports and games are treated by the many countries as cultural activities, so we can say that the trend of games and sports can never finish in the future.

Sports activities have been made compulsory in the schools and colleges for the student’s good physical health, mental health and professional career. Sports have nice career. Sports have nice career in future for anyone who involved dedicatedly. It is very beneficial especially for the students as it support physical as well as mental development. People who are much interested and good in the sports can live more active and healthy life. They can develop better discipline and leadership qualities at the workplace as well.

Physical coordination and strength:

If is considered that both sports and strength are two sides of the same coin. It is true that a person involved in the sports activities, get more strength than the normal person without any physical exercise. A person interested in the sports can develop great body strength and make his/her career bright by participating in any sports at national or international level. Playing sports help in strengthening the immune system, maintaining physical coordination, enhancing body strength and improving mental power.

Character and Health Building:

Playing sports on regular basis helps in character and health building of any person. It is generally seen that a person involved in sports activity from the very young age, develops very clear and strong character as well as good health.

Conclusion:

Sports person becomes more punctual and disciplined thus, we can say that sports give various strong and well-built individuals to the society and nation.

As there were no one to play with Ebright, his mother encouraged him to learn new things. Richard Ebright started collecting butterflies as a hobby. This led him to research and discover many things. Hence, hobbies play an important role in one’s life.

National festivals: Since the attainment of independence, we have been observing three days as national festivals. They are the Independence day on 15th of August, the Republic day on 26th of January and Gandhi Jayanti on 2nd of October. On 15th of August India obtained independence from British rule and the day is celebrated with due joy.

India was declared a republic on 26th of January 1950 and the day is celebrated as Republic Day. On Republic Day, an impressive parade is held at New Delhi attended by high dignitaries from India and abroad. It is also observed in State capitals and all important cities and towns.

Gandhi Jayanti is celebrated on 2nd of October, the birthday of Gandhiji, in order to express our deep respect for the great ideals of Mahatma Gandhi. Truth, non-violence, simplicity, universal brotherhood, dignity of labour, as practised by Gandhiji, are highlighted so that students inculcate these values of life in their own lives also.

These national festivals help in the formation of a strong and united India. They keep the spirit of freedom alive in the hearts of Indians for all times to come.

This language is to specify the internal schema. This language may specify the mapping between two schemas.

The poet was answered by a wonderful vision. A vision of new and bright future. In the vision he saw the mother (motherland) rise gloriously against the blue sky. The three milky – white oceans, ie., the Arabian sea, Bay of Bengal and the Indian Ocean, rose and fell with steady powerful motions.

(There was calm on the sea’s). Their waves sent forth a wonderful and illuminated her. She seemed to sit of this illuminating light to write the ‘book of marrow’, (a new reign, a new future’. She foresaw a new ‘destiny’, a new bright future like the bright sun: god, who destroyed darkness with his powerful rays, this new future wiped out the sorrow of her people.

This new future will arrive like a ‘clear dawn’. In this new future the sorrows and hardships of her people will flee like a nightmare (bad dream). This new future (sun – beam) will act like the ‘Hand that saves’ her people.

Often Mobile Phone is also called “cellular phone”. It is a device mainly used for a voice call. Presently technological advancements have made our life easy. Today, with the help of a mobile phone we can easily talk or video chat with anyone across the globe by just moving our fingers. Today mobile phones are available in various shapes and sizes, having different technical specifications and are used for a number of purposes like – voice calling, video chatting, text messaging or SMS, multimedia messaging, internet browsing, email, video games and photography. Hence it is called a ‘SmartPhone’. Like every device, the mobile phone also has its pros and cons.

Advantages of Mobile phone 

1. Keeps us connected:

Now we can be connected to our friends, relatives at any time we want through many apps. Now we can talk video chat with whoever we want, by just operating your mobile phone or smartphone. Apart from this mobile also keeps us updated about the whole world.

2. Day to Day Communicating: 

Today mobiles phone has made our life so easy for daily life activities. Today, one can assess the live traffic situation on mobile phone and take appropriate decisions to reach on time. Along with it the weather updates, booking a cab and many more.

3. Entertainment for All:

With the improvement of mobile technology, the whole entertainment world is now under one roof. Whenever we get bored with routine work or during the breaks, we can listen to music, watch movies, our favorite shows or just watch the video of one’s favorite song.

4. Managing Office Work: 

These days mobiles are used for many types of official work from meeting schedules, sending and receiving documents, giving presentations, alarms, job applications, etc. Mobile phones have become an essential device for every working people.

5. Mobile Banking:

Nowadays mobiles are even used as a wallet for making payments. Money could be transferred almost instantly to friends, relatives or others by using mobile banking in the smartphone. Also one can easily access his/her account details and know past transactions. So it saves a lot of time and also hassle-free.

Disadvantages of Mobile Phones 

1. Wasting Time :

Now day’s people have become addicted to mobiles. Even when we don’t need to mobile we surf the net, play games making a real addict. As mobile phones became smarter, people became dumber.

2. Making us Non – communicable :

Wide usage of mobiles has resulted in less meet and talk more. Now people don’t meet physically rather chat or comment on social media.

3. Loss of Privacy :

It is a major concern now of losing one’s privacy because of much mobile usage. Today anyone could easily access the information like where you live, your friends and family, what is your occupation, where is your house, etc; by just easily browsing through your social media account.

4. Money Wastage :

As the usefulness of mobiles has increased so their costing. Today people are spending a lot amount of money of buying smartphones, which could rather be spent on more useful things like education, or other useful things in our life.

Conclusion:

A mobile phone could both be positive and negative; depending on how A uses it. As mobiles have become a part of our life so we should use in in a proper way, carefully for our better hasslefree life rather using it improperly and making it a virus in life.

Hobbies: Hobbies are what people do to engage themselves during their leisure. They must be encouraged because they provide a welcome diversion from routine work. Most students have hobbies. Photography, stamp collection and gardening are some of the most popular hobbies.

Unlike most hobbies which incur some expenditure, gardening is least expensive. Moreover, it can be turned into a source of income. But it needs both land and water and cannot be pursued in crowded areas of cities. It may start as a hobby with a child and the child may become a good photographer when he grows up.

There are some hobbies which are not so common or inexpensive. In the west, millionaires hunt for curious photos and paintings and stock them in their private galleries. Some people take this to such an extent that they even arrange thefts to procure paintings illegally.

This becomes a mania and not a hobby. Hobbies should never be allowed to become manias. In people who are very prestige-conscious, hobbies are pursued not for pleasure but for the social importance they get through them. This is a negative aspect of hobbies.

We should be engaged in some hobby or other. Otherwise we would be in the danger of losing ourselves solely in our work. Hobbies take our minds off our worries and further our interest in life.

It specifies user views and their mappings to the conceptual schema.

The main cause of Population explosion of our country is the result of prevailing high birth rate and large decline in the death rate due to the advancement of science especially in medical field.

Now-a-days the cities are main attraction for the employment. Many Industries. Office, Many Public sectors. Banks, hospitals, IT, BT Companies etc, all are located in cities. So the people come to cities like flood. Day by day the people coming to cities increased. Once they came and settled here, their families will also come and settled here.

Opening of Various companies make the rapid increase of population. In cities the people get all the facilities very easily. Because of all the facilities many many Industries. Businesses. Offices. Schools. Colleges. Hospitals etc., all are increasing with a rocket speed. All these are increasing year after year makes the population explosion in cities.

(IT = Information Technology.)

(BT = Bio – technology)

Radio: Even a couple of decades ago, other than the newspaper, the only means of reaching out to people was through the radio. It was a marvel that by possessing a small rectangular box, people could get local, national and international news. It could also entertain them with songs, stories and skits. It could intellectually stimulate them with discussions and talks.

It is true that with the advent of television, radio has lost its prominence. It is an understandable phenomenon as people generally go in for visual impact rather than auditory. But the fact remains that despite the stiff competition, radio has retained its importance. In fact unlike TV, radio improves our power of concentration and it is free of the destructive edge. It is still very popular in the rural areas. Since it is portable, it is possible to carry a battery-operated radio from one place to another.

Radio, as any other mass medium, focuses primarily on informing people of the important events. Secondly, it educates masses and creates awareness. Finally, it entertains. All the three roles are equally important and radio is undoubtedly a friend of man.

Population Explosion:The word ‘explosion’ in the term ‘population explosion’ rightly points out the destructive edge of increased population. India has already crossed the one billion mark and the population is increasing unabated.

Although positive references have been made to population by optimists, all of us know that an overly populated nation is always on the brink of disaster. Where the population goes out of control, the government is unable to provide even basic necessities to its citizens. There is also the problem of unemployment. Family planning programmes have not been highly successful because the uneducated lot is unaware of the benefits of family planning.

Ironically, the poor and uneducated continue to have many children whereas the middle-class and the upper-middle-class go in for family planning. This has tilted the balance in such a way that soon the ratio between the haves and the have-nots will be a dangerous one. The poor people will outnumber the rich and such a development is not at all healthy.

That is why educating the masses is of paramount importance. Only through education and awareness programmes can we make the lower classes realize that there is no point in increasing the number of children. Thus, children will get the chance to grow as healthy citizens and society too will progress without unrest and dissatisfaction among its people.

India, which has made substantial programmes in almost every field, will have the satisfaction of being progressive in the area of population too. Having said this much, it is.necessary to acknowledge with joy that in certain areas where intensive family planning work has been done, the birth rate has come down and this leaves us with a ray of hope.

A data base schema is specifies by a set of definitions expressed by a special language called DDL.

National Integration: India is a melting pot of different cultures, castes and communities. On the one hand if it gives us the pride of unity in diversity, on the other it also poses the problem of small differences in practices and rituals leading to big differences and communal discord. That is why, it is important for all of us to behave in such a way that none of our acts go against national integration.

India has all along proclaimed to the whole world “Vasudeva Kutumbakam” which means the whole world is one family. That is why, it doesn’t suit the spirit of India if we fight in the name of caste and community. We should preserve our integration by having the feeling of brotherhood. India is also known for its doctrine of non-violence.

Let us purge our hearts of every instinct of violence so as to uphold the concept of peace. Only when each Indian has the feeling of oneness and non-violence in his heart, will our country be truly integrated. Towards this end, it is the youth of India who have to strive hard. The future of India is truly in the hands of the youth.

It is the number of entity type participating.

Relationship type defines a set of associations or a relationship set among a given set of entity types.

Newspapers: A cup of tea and the morning newspaper widely spread in the hands – this is how a gentleman was described by a writer. This is today typical of many an urbanite. A newspaper is a must, like a cup of tea, for modem citizens.

The newspaper fulfils a wide variety of roles in the modem community. It gives information about the happenings within the country and abroad, comments on political, economic and social developments and thus educates the reader. It helps him in coming to his own conclusions and forming opinions.

It is the newspaper again, that gives information regarding jobs or workers available. One can insert an advertisement in a local newspaper and choose his employees or even employers. They also give information regarding the large number of laws and rules made by the government from time to time. Ignorance is no excuse so far as law is concemed.

Newspapers also advertise for brides and bridegrooms. The “matrimonial” column is quite popular with eligible bachelors and spinsters and though the proverb is that “Marriages are made in Heaven” some are actually made through newspapers. There are other interesting columns such as Lost and Found, Machinery and equipment for sale, accommodations wanted or available and what not.

It is again the newspaper that gives us information regarding weather, and forecast about rainfall, which of course remains only a forecast. They also notify the radio and television programmes of the day, the films running in the cinema houses of the town and other entertainments available. For the traders, a newspaper is a must as it gives information regarding the prices prevailing at the market centres.

On Sundays, the newspapers carry special feature articles on topical subjects. They also review the latest books published in various fields. On the whole, newspapers today occupy a position in the lives of the people, which nothing else did so far. They are the source of all information one gets and they educate in the process. The politician, industrialist, the businessman and the student or the housewife all should read newspapers every day.

I was rather young when I first laid my hands on R.K. Narayan’s ‘Swami and Friends’. I had been addicted to comics like Amar Chitra Katha and would never touch anything else. But, one day, when I was very bored and there was not a single comic lying by, I reluctantly took up ‘Swami and Friends’. That is how I stepped into the world of Malgudi.

Soon, I found that Swami was a child very like myself. Swami’s petty jealousies and terrible agonies were my own. I suffered when his cruel master Ebenzes troubled him and wept when he was badly treated by friends. I was elated when Swami befriended Rajam and Mam, and finally, at Rajam’s departure, I could not hold myself from sobbing out aloud.

I wonder now, as I did then, how R.K. Narayan can conjure up a child’s world so easily as if he were himself no more than a child. No other writer, except perhaps Mark Twain has such ability to enter into the recesses of a child’s mind. Even now, whenever I wish to go back to my childhood again, all I have to do is take up “Swami and Friends”.

My favourite book: I was rather young when I first laid my hands on R.K. Narayan’s ‘Swami and Friends’. I had been addicted to comics like Amar Chitra Katha and would never touch anything else. But, one day, when I was very bored and there was not a single comic lying by, I reluctantly took up ‘Swami and Friends’. That is how I stepped into the world of Malgudi.

Soon, I found that Swami was a child very like myself. Swami’s petty jealousies and terrible agonies were my own. I suffered when his cruel master Ebenzes troubled him and wept when he was badly treated by friends. I was elated when Swami befriended Rajam and Mam, and finally, at Rajam’s departure, I could not hold myself from sobbing out aloud.

I wonder now, as I did then, how R.K. Narayan can conjure up a child’s world so easily as if he were himself no more than a child. No other writer, except perhaps Mark Twain has such ability to enter into the recesses of a child’s mind. Even now, whenever I wish to go back to my childhood again, all I have to do is take up “Swami and Friends”.

The collection (or set) of similar relationships.

Benefits of Yoga

Yoga is one of the most used methods in the mind-body connection. Yoga refers to a type of exercise based on controlled breathing, diet, exercise and a series of physical postures. Yoga is very useful because it helps us to control our mind, contributes to health and works as a stress-reducer. The term 'Yoga' means union. A Yogi's ultimate aim is to attain this union with the eternal self with the help of mental and physical exercise. The entire credit goes to maharshi Patanjali, the founder and father of Yoga.

Yoga is an art which takes into purview the mind, the body and the soul. Today Baba Ramdev is spearheading the Yoga movement to make India and Indians healthy and wise.

It is an association among two or more entities.

Our environment is a precious gift of nature. It consists of the air we breathe, the water which we drink, the earth on which we live. Environmental pollution is the unfavourable alteration of our surroundings, wholly or largely as a by-product of man’s actions, through direct or indirect effects of changes in energy patterns, radiation levels, chemical and physical constitution.

Pollution can occur in water, soil or air when substances released into them are beyond their capacity of assimilation. Water is required in large quantities for industrial purposes while the waste is later dumped in rivers or into the sea. Community wastes such as sewage and garbage from urban settlements are discharged into watercourses.

Water that flows on the surface of cultivated fields where fertilisers, pesticides, insecticides and other agrochemicals are used, contributes much to the pollution of water.

The pollution of air is largely due to the discharge of wastes in the form of smoke from industry, power plants, automobiles and houses; and also due to burning of fossil fuels. Soil pollution inevitably follows the pollution of air and water.

Besides, the solid residuals from industries, commercial concerns and households contribute to it. Deforestation at an unprecedented scale is causing soil erosion, floods, droughts and siltation. In addition to the above there is the problem of noise pollution.

Noise is unwanted sound that is usually unpleasant. Noise pollution is caused by industries, automobiles, explosions, and public address systems. Fall out from nuclear explosions and emissions from industrial use of nuclear energy cause radioactive pollution. In most of the cases pollution is caused by careless and non-judicious human activities, without caring for their harmful effects on nature.

Pollution 

Pollutants are the key elements or components of pollution which are generally waste materials of different forms. Pollution disturbs our ecosystem and the balance and the balance in the environment. With rise of population and in increase in industries, the problem of pollution is becoming more serious. Nowadays, the air, soil and water are polluted. The water of river is no longer suitable for drinking. The air is no longer fit for breathing. Release of industrial waste, mining and deforestation exploits the soil. 

Pollution not only affect human beings but also affects the nature, plants, fruits, vegetables, forests, animals etc. It is crucial to control pollution as the nature, wildlife and human life are precious gifts to the mankind. We must take steps to reduce pollution.

It is the number of attribute of its relation schema.

Television: The television is one of the recent wonders of science. People can watch television not only in cities but also in villages for this medium has begun to spread even to the remote parts of the countries. The day is not far off when the television will be as common as the radio or the cinema. The use of television as an effective communication medium cannot be ignored. Television gives us information faster than the newspapers. It can bring us reports of events even as they are happening.

Television can also be used as a teaching medium. The educational programmes telecast via satellite and the adult educational programmes are examples. We also see health and family welfare programmes and science features on television.

Some people call TV the “idiot box”. It is owing to the low standard of entertainment that television offers us. Also, it may tend to make children TV addicts at the expense of other activities. In countries where mass media are not completely free, as in India, television can also become a tool for the ruling party.

The TV is such a powerful medium of propaganda that only very intelligent or cautious watchers can resist being influenced by it. In short, we may say that television is a very powerful means of communication whose benefits for the citizen depend chiefly on the way it is used.

Environmental pollution: Our environment is a precious gift of nature. It consists of the air we breathe, the water which we drink, the earth on which we live. Environmental pollution is the unfavourable alteration of our surroundings, wholly or largely as a by-product of man’s actions, through direct or indirect effects of changes in energy patterns, radiation levels, chemical and physical constitution.

Pollution can occur in water, soil or air when substances released into them are beyond their capacity of assimilation. Water is required in large quantities for industrial purposes while the waste is later dumped in rivers or into the sea. Community wastes such as sewage and garbage from urban settlements are discharged into watercourses.

Water that flows on the surface of cultivated fields where fertilisers, pesticides, insecticides and other agrochemicals are used, contributes much to the pollution of water.

The pollution of air is largely due to the discharge of wastes in the form of smoke from industry, power plants, automobiles and houses; and also due to burning of fossil fuels. Soil pollution inevitably follows the pollution of air and water.

Besides, the solid residuals from industries, commercial concerns and households contribute to it. Deforestation at an unprecedented scale is causing soil erosion, floods, droughts and siltation. In addition to the above there is the problem of noise pollution.

Noise is unwanted sound that is usually unpleasant. Noise pollution is caused by industries, automobiles, explosions, and public address systems. Fall out from nuclear explosions and emissions from industrial use of nuclear energy cause radioactive pollution. In most of the cases pollution is caused by careless and non-judicious human activities, without caring for their harmful effects on nature.

A relation Schema denoted by R(A1, A2, ..., An) is made up of the relation name R and the list of attributes Ai that it contains. A relation is defined as a set of tuples. Let r be the relation which contains set tuples (t1, t2, t3, ..., tn). Each tuple is an ordered list of n-values t=(v1,v2, ..., vn).