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Copy of data created for safe storage is Backup 

6 headings are there in html.

XML uses  Custom tags 

URL stand for Uniform Resource Locator 

Data Backup is the copying and archiving of computer data so it may be used to restore the original in case of dataloss.

Online backup is a method of web/cloud storage in which data is regularly backed up on a remote server/cloud.

Examples of Online backup tools are: Google Drive, Dropbox etc.

A primary key is a special relational database table column (or combination of columns) designated to uniquely identify each & every table record. It does not contain NULL & duplicate values

Database is usually a large collection of data which is organized in a very effective and efficient manner. It allows the user for rapid search and retrieval of required information. 

For describing the use of <UL> and <LI> tag with example

Mark for writing correct use of <UL> with <LI> tag)

Mark for writing correct example of <UL>...</UL> tag)

Mark for writing correct example of <LI>...</LI> tag)

In information technology, a backup, or the process of backing up, refers to the copying and archiving of computer data so it may be used to restore the original after a data loss event.

Data Backup protect us against failures like:

Hardware failure

Media Failure 

Accidental file deletion

Theft and natural disaster

Virus attack 

Following are some storage devices to take backup:

External hard disk

CD

DVD

USB

Flash drive

Online Backup 

(a) Shravan should develop a blog.

(b) Blogger.Com Wordpress.Com

<OL> stands for Ordered List which can be either numerical or alphabetical while <UL> stands for Unordered List which can be either disc, square or circle.

Code examples containing <OL> and <UL> is given below with their respective outputs:

img tag-src, alt, height, width

table tag - align, bgcolor, border, cellpadding, cellspacing

a tag -  href, name

<IMG> tag is used to insert images in any webpage. 

Its two main attributes are as follows:

SRC : It specifies the URL of the image.

 ALT :  It specifies an alternate text for an image.

Learning with the help of electronic resources like computers, tablets, smart phone, internet etc. is known as E-learning. 

Advantages of eLearning are:

•  It is time saving as well as removes the distance barrier between learner & teacher. 
• It has quicker delivery cycle times than traditional classroom-based instruction.
• It is less expensive to set-up an e-learning environment. 

Malware is a computer software which is specifically designed with malicious intention generally to disrupt, damage, or gain authorized access to a computer system. It can be of various types like Virus, Worms, Trojan Horses etc.

precautionary measures to be taken against malware are as follows: 

Install quality Antivirus software

Regular update of Antivirus software and regular PC scan

Do not click on unknown or suspicious links 

Avoid pirated software

In computing, a hacker is any skilled computer expert who uses their technical knowledge to overcome a problem or otherwise gains remote access to a protected computer system mainly to get thrill out of it. A cracker is also a skilled computer expert but he/she breaks into or otherwise violates the system integrity of remote machines with malicious intent. Having gained unauthorized access, crackers destroy vital data, deny legitimate users service, or cause problems for their targets.

Those goods that are consumed together are called complementary goods. Example: Tea and sugar. If the price of sugar increases, then it will lead to a decrease in the demand for tea. If the price of tea increases, then it will reduce the demand for sugar. 

The demand for a good move in the opposite direction of the price of its complementary goods. That is, 

If the Price of tea (P_T) increases, then the demand for sugar (D_s) decreases. 

If the Price of sugar (P_s)  increases, then the demand for tea (D_T) decreases

Inferior good: Those goods that share an inverse relationship with their prices and with the income of a consumer are called inferior goods. That is,
If the price of a good (P_x) increases, then the demand for the good (D_x)decreases.
If a consumer’s income (M) increases, then the demand for good increases.
Examples: Coarse cereals, birds, etc.

Example of Microeconomics: Wages of labour in a particular factory.

Example ol Macroeconomics : Aggregate demand

It is considered a Macroeconomics study because the problem of unemployment in India is an economic issue at the level of an economy as a whole.

No, subsidies should not be treated as transfer payments because value addition has already occurred. In fact, subsidies tend to lower the market price of the goods produced. Subsidies are the part of NNP fc which is why these are deducted from factor cost to equate it with Market Price. 

Real GNP rise only when there is rise in physical output during a year. 

It is clear from the following points-

• A country is interested in rise in physical output and not in monetary (Nominal GNP) as an increase real GNP leads to rise in living standards. 
• A rise real GNP reflects the economic growth whereas continues fall in it indicator of recession. 
• Real GNP eliminates the effect of change in prices. 
• It is used for comparisons internationally or inside the country. 

False: Gross national product is always equal to gross national expenditure.

False: Real GDP is taken at some constant prices. It does not have the influence of price fluctuations.

False: Exports are a part of domestic income. Exports are sent from home production.

Yes, because it is a part of current domestic output.

Parietal or oxyntic cell

A.T. Q

πr² x 1800 = π x 1/2 x 1/2 x 8

⇒ r² = 1/900

⇒ r = 1/30

∴ Thickness of wire = 1/15 cm.

4/3π r³ = πR²h

4/3(4.2)³ = (6)² h

⇒ h = 2744/100

∴ ℎ = 2 ∙ 744  cm

Correct Table 

Drawing an ogive with co-ordinates 

(420,12), (440,26), (460, 34), (480,40), (500, 50)

(c) terminate after 3 decimal places

The Correct option is (a) 165

The Correct option is (c) 20

Area of track = 120 × 70 + π (35)² – [120 × 56 + π (28)² 

 = 120 x 14 + 22/7 [(35)² - (28)²]

= 1680 + 22/7 x 7 x 63

  = 1680 + 1386

  = 3066m².

 Yes, Meena is wrong.

(d) not defined

The Correct option is  (c) 20

5 tan A = 4

Tan A = 4/5 

Tan A = P/B = 4/5

H = √P² + B² = √4² + 5² = √16+25 = √41 

Sin A = P/H = 4/√41 

Cos A = B/H = 5/√41 

Substituting the value now,

= (5 sin A - 3 cos A)/ (5 sin A + 3 cos A)

= (5 x 4/√41 - 3 x 5/√41) / (5 x 4/√41 + 3 x 5/√41 )

= ( 20/√41 - 15/√41 ) / ( 20/√41 + 15/√41 )

= ( (20-15)/√41) / ((20+15)/√41)

= 5/√41 / 35/√41 

= 5/√41 x √41/35

= 1/7 

Discipline is defined as the practice of training people to obey rules or a code of behaviour, using punishment to correct disobedience. If any institution be it family, school, college, or workplace wants to function properly; discipline is to be maintained within it. For example, discipline in a family means that the members of the family follow a certain pattern in what they do like getting up going to bed on time, having their meals on time, etc which replicates a specific routine in life.   

Discipline in a school and college means that the students should reach there on time, greet the teachers whenever they meet them, maintain silence wherever and whenever required like in a library, or attend all the functions held in the school and college etc. Discipline in the office or at any workplace means that all the working staff be it the employers or the employees should reach the workplace on time and also maintain the pre- defined code of conduct.  

Thus, it is understood that for the successful functioning of any of the institutions on earth, maintenance of discipline is mandatory. But the bitter truth remains; discipline is not maintained by each and every individual at the same level. The presence of discipline in an individual’s life leads to phenomenal success and the contrary is true in the case of the absence of discipline.

Normal cells are transformed into cancerous cells due to various physical, chemical and biological agents called carcinogens. 

Cellular oncogenes (c-onc) or proto-oncogenes are present in inactivated state but under certain conditions (like mutation) get transformed to cancer-causing oncogenes. Whereas viral oncogenes are cancer-causing genes of virus.

a–Promoter 

b–Terminator

According to fact, when R=CH₃​ group in aliphatic amine, the basic strength would be 

(CH₃​)_2​NH>CH₃​NH₂​>(CH₃​)₃​N

This altered basicity is due to the solvation effect in aqueous solution

Hinsberg reagent is an alternative name for benzene sulfonyl chloride. This name is given for its use in the Hinsberg test for the detection and distinction of primary, secondary, and tertiary amines in a given sample. This reagent is an organosulfur compound. Its chemical formula can be written as C₆H₅SO₂Cl.

(a) Tert-butyl peroxide acts as a free radical generating initiator(catalyst)

CH₂ = CH- CH = CH₂

(b) C₆H₅ – CH= CH₂

This statement is true

AERODYNAMIC LIFT 

When a curved airfoil, like the wing of a bird, or the wing of an airplane, moves through the at a positive angle of attack, then the moving air is deflected downwards. This downwards deflection, by Newton's third law, pushes the wing, and everything attached to it, upwards. Aerodynamic lift increases with the square of the velocity, fly twice as fast, get four times as much lift force upwards.  

The aerodynamic drag that aerodynamic lift induces also increases with the square of the velocity, however, on an absolute scale, it is much smaller than the generated lift. This is one reason why airplanes (and birds) are so efficient and can fly so fast, they get their lift at a very low cost.  

This is in contrast to helicopters or other pure rotor craft (like multicopters). Such vehicles do not have the benefit of 'nearly free' lift from the wing, but have to at all times generate their lift actively via their rotors, in addition to expending energy pushing themselves forward. Since the rotors also cause a lot of drag, copters can typically fly at only half the speed of comparably sized airplanes (including SkyCruiser and SkyProwler) and have less than half the range.

(i)  Copper has high enthalpy of atomisation and low enthalpy of hydration. Since the high energy to transform Cu(s) to Cu²⁺(aq) is not balanced by hydration enthalpy, therefore  E°(M²⁺/M)value for copper is positive(+0.34 V).

(ii)  Cr²⁺ is reducing as its configuration changes from d⁴ to d³ , the latter having more stable half filled t_2g level. On the other hand, the change from Mn³⁺ to Mn²⁺ results in extra stable d⁵ configuration.

(iii)  This is due to the increasing stability of the species of lower oxidation state to which they are reduced.

According to the given equation, the rate of disappearance of reactant A is twice the rate of disappearance of reactant B.

Electronic configuration of ‘P’ : 2,8,7
Group number: 17
Period number: 3
Electronic configuration of Q: 2,8,8,1
Group number: 1
Period number: 4