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X(X&) is used to identify the copy constructor class type X as copy constructor is a constructor of the form classname (classame &).

class Travel Plan

 long PlanCode;

char *Place;

int Number_of_travellers;

int Number_of_buses;

public: TravelPlan()

{

PlanCode=1001;

strcpy(Place,"Agra");

Number_of_travellers=5;

Number_of_buses=1;

}

void NewPlan()

{

cout<<"Enter Travel code, Place and Number of travellers \n";

cin>>PlanCode;

gets(Place);

cin>>Number_of_travellers;

if(Number_of_travellers<20)

Number_of_buses=1;

else if(Number_of_travellers<40)

Number_of_buses=2;

else

Number_of_buses=3;

}

void ShowPlan()

{

cout<<"Plan Code:"<<PlanCode<<endl;

cout<<"Place:"<<Place<<endl;

cout<<"Number of travellers:"<<Number_of_travellers<<endl;

cout<<"Number of buses:"<<Number_of_buses<<endl;

}

};

One who writes program is called Programmer.

Data independence allows modification of a scheme definition in one level without affecting a scheme definition in the next higher level.

programming or coding.

a. Internal Level

b. Conceptual Level

c. External Level (View Level)

Data independence is the ability to modify a scheme definition in one level without affecting a scheme definition in a higher level.

data independence capabilities : 

• Physical Data Independence has ability to modify the scheme followed at the physical level without affecting the scheme followed at the conceptual level.
• Logical Data Independence has ability to modify the conceptual scheme without causing any changes in the schemes followed at view levels

Correct option is C) Let

A professional code of ethics is a guiding principle aimed to assist professionals to conduct work with commitment, dedication, sincerity, honesty, and integrity.

• Professionals should follow the specific principles of their profession and do their duties as per the requirements of the profession.
• Professional ethics deals with the principles and values that the professional should implement to create a conducive atmosphere in the workplace.
• They should also emphasize proving freedom to all the students so that they can express their problems, feeling, and emotions without any fear.

• The professional code of ethics for teachers is purposely designed to protect the rights of all students. It becomes crucial and important for teachers to understand their work ethics and values before entering the teaching profession. As a teacher, they have a huge role to play in the entire teaching-learning process.

According to the professional code of ethics for teachers, a teacher should be not considered private gains o personal interest.

• A teacher must make all the policies equal for all. He/She should not be biased.
• A teacher's job is to provide quality education to all students. A professional code of ethics must address this fact, stating that teachers must not show favouritism or discriminate against students.
• The teacher should tutor to pay a pupil in his class.
• The teacher should have a cordial relationship with his/her colleagues.
• Teachers also must interact with students appropriately, not taking advantage of students in any way, bullying students, or putting them down.
• Teachers should always stay away from the conflict between their professional work and private interests because it could plausibly be crash unenthusiastically on pupils/students. It could demoralize the students and affects their perception of school and teachers.
• The teachers should not be biased while imparting and evaluating the student's performance related to academic and co-curricular activities. They must respect all the students and treat them uniformly irrespective of caste, creed, gender, civil status, family status, sexual orientation, religion, age, disability, race, ethnicity, region, community, and socioeconomic status. 
• Teachers should respect the privacy of other members of their own school and maintain the confidentiality of information gained in the course of professional practice unless a legal imperative requires disclosure or there is a legitimate concern for the wellbeing of an individual.

Thus from the above-mentioned points, it is clear that the code of ethics of the teacher permits him to tutor for pay a pupil in his class.

The differences between impact and Non-Impact printers are:

The differences between interpreter and compiler are:

There are two Integrity rules. 

1. Entity Integrity: States that "Primary key cannot have NULL value" 

2. Referential Integrity: States that "Foreign Key can be either a NULL value or should be Primary Key value of other relation.

The are three levels of abstraction:

1. Physical level: The lowest level of abstraction describes how data are stored. 

2. Logical level: The next higher level of abstraction, describes what data are stored in database and what relationship among those data. 

3. View level: The highest level of abstraction describes only part of entire database.

5 times the loop will execute.

1.  abs() function in excel returns the absolute value of a number. The absolute value of a number is the number without its sign.

For example, Abs(-25)

output: 25

2. Fact() function returns the factorial of a number. The factorial of a number is equal to 1*2*3*…* number.

For example, fact(5)

output: 120

3. The mod() function returns the remainder after number is divided by divisor. The result has the same sign as divisor. MOD(number, divisor)

For example, Mod(5,2)

output: 1

4. The power () function returns the result of a number raised to a power. POWER(number, power)

For example, power(5,2)

output: 25

The sum() function adds all the numbers that is specified in the brackets.

For example, SUM(A1 : A5) adds all the numbers that are contained in cells A1 through A5. For another example, SUM(A1, A3, A5) adds the numbers that are contained in cells A1, A3, and A5.

Double [] percentage = {78.3, 89.6, 90, 78 ,67};

1. Function prototype: The declaration of a function before it is used or called is known as function prototype.

Ex: int demo (int, int, int);

2. Actual arguments: Actual parameters: the data that is passed by the calling function as arguments/parameters is known as actual arguments, i.e., the arguments which are present at the time of function call.

3. Formal arguments: Formal parameters: are the names of the argument/parameter in the function header of called function. Formal parameter values are used by the called function body.

4. Local (internal) Variables: The variables declared within function block are called local variables. A variable can be used only within the function where it is defined in. Such a variable is accessible only from the function or block in which it is declared.

5. Global Variables: They are the variables that are declared outside of main( ) function body or any other functional block. These variables can be used by all modules and functions in the program. 

1. A class is a physical or logical entity that has certain attributes. A class is a template from which objects are created. Object is an instance of a class . 

2. Class book can have title, author, publisher, price as the data members. To display the details of class book you would call the method member display() Method members of a class are invoked through the object like book1 to perform the action associated with that method

Correct code :

int number = 1; 

while (number <= 5) 

{System.out.print("Square of " + number); 

System.out.println(" = " + number*number); number++; }

13 

True 

22

While loop :

1. A while loop is an entry controlled loop 

2. Body of loop may never be executed 

3. The variables in the test condition must be initialized prior to entering the loop structure

Do while loop :

1. A do-while loop is an exit control loop - 

2. Body of loop is executed at least once 

3. It is not necessary to initialize the variables in the test condition prior to entering the loop structure.

n=5 will be the value of n after the execution

1. A special method member called the constructor method is used to initialize the data members of the class. Feature 

2. The constructor has the same name as the class, has no return type, and may or may not have a parameter list. 

Or 

Whenever a new object of a class is created, the constructor of the class is invoked automatically

Let the two numbers be x & y 

Given x + y = 40 ……. (1) 

& x – y = 8 … (2) 

Solving we get 

Adding 2x = 48 ⇒ x = 24 & y = 40 – 24 = 16 

∴ Ratio of the numbers is 24 : 16 ⇒ 3:2.

(p ∧ q) ∨ ~ r 

(F ∧ T) ∨ ~ r 

F ∨ T = T

(a) If two events cannot occur simultaneously in a random experiment then they are called mutually exclusive events 

(b) Events are said to be independent, if the occurrence of one does not depend upon the occurrence of the other 

(c) In a random experiment, let S be the sample space & let E be an event then E C S, So ‘E’ is also an event called the complementary of E.

Given [-9, 2] - [5, - 1] = [x, y]

⇒ [x, y] = [(-9, -5), (2 - (- 1))] = [-14, 3]

⇒ x = - 14, y = 3.

Substituting x² – 3x + 5 = t to get (2x + 3)dx = dt 

∴ Given integral becomes ∫t^3/2dt 

Integrating to get t⁵²/52 + C = 2/5(x² + 3x + 5)⁵² + C

∫x sin xdx = -x²cosx – ∫-cosx.2xdx 

= -x² cosx + 2[xsinx – ∫sinx.dx] 

= -x²cosx + 2xsinx + 2cosx + C

dy/dx = 10(a² – x²)⁹ (0 – 2x) 

= – 20x(a² – x²)⁹

∫x² - 6/x + 5e^xdx = x³/3 - 6logx + 5e^x + c

Identity : sin²θ+cos²θ = 1

LHS = cosec θ \(\sqrt{(1-cos^2\theta)}\) 

 = cosec θ\(\sqrt{sin^2\theta}\)

 = cosec θ sin θ

 = \(\frac1{sin\theta}\times sin\theta\)

 = 1

= RHS

x³/3 6loge^x + 5e^x + C

Let y = 5e^x – log x – 3√x

dy/dx = 5e^x - 1/x - 3(1/2√x)

\(\frac{dy}{dx} = 5e^x - \frac{1}{x} - \frac{3}{2\sqrt x}\)

5e^x - 1/x - 3/2√x

There are eight octants, so sphere can be possible in eight octants.

Oxidation is defined as the chemical change in which there occurs an increase in the oxidation number of an atom or atoms while reduction may be defined as a chemical change in which there occurs a decrease in the oxidation number of an atom or atoms.

(b) In India, the problem of soil erosion is associated with deforestataion .Terace cultivation helps in less erosion of soil.

The correct answer is (d) 6.023 × 10²³

One mole of a chemical entity can be defined as equal to 6.023×10²³ particles of that substance, where “particles” can mean “atoms, molecules, and the different subatomic particles”. We shall calculate the moles of the compound given and thus, the number of particles.

Formula Used: \(moles = \frac{mass}{molar\, mass}\)

The molecular weight of ammonia is equal to the sum of the atomic weights of nitrogen and hydrogen atoms = [14+(3×1)]= 17 grams

Hence, 17 grams of ammonia = 6.023×10²³ molecules of ammonia.

Therefore, 4.25g of ammonia \(= \frac{6.023 \times 10^{23}}{17} \times 4.25 = 1.505 \times 10^{23}\) molecules of ammonia.

Now each molecule of ammonia has four atoms, one atom of nitrogen and three atoms of hydrogen. Hence, the total number of atoms in 1.505 x 10²³ molecules of ammonia

= 4×1.505 × 10²³

= 6.023 × 10²³ atoms.

Molecular weight at NH₃ = 17 g/mol

∴ Number of moles of NH₃ in 100 g = 100/17 mol = 5.9 mol

As we know,

1 mole of any molecule contains = 6.022 x 10²³ = molecules.

∴ Number of NH₃ molecule in 5.9 mole NH₃

 = 5.9 x 6.022 x 10²³

 = 35.53 x 10²³

 = 3.55 x 10²⁴ NH₃ molecule.

Hence, 100g NH₃ contains 3.55 x 10²⁴ molecule of NH₃.

Let say, molecular weight of substance is x g/mol.

As we know, relative lowering of vapour pressure is equal to the mole fraction of solute.

∴ \(\frac{P^o-P_s}{P_o}=x_2\)------(1)

where, \(\frac{P^o-P_s}{P^o}\) = relative lowering in vapour pressure  = 0.00715

x₂ = mole fraction of substance (solute)

Number of moles of water = 100/18 = 5.56 mol

Number of moles of substance = 7.2/x = mol

∴ x₂ = \(\cfrac{\frac{7.2}x}{5.56+\frac{7.2}x}\)

 ∵ the moles of solvents are always much greater than moles of solution. So that we can neglect 7.2/x as compare to 5.56.

∴ x₂ = \(\cfrac{\frac{7.2}x}{5.56}\)

⇒ x = \(\frac{7.2}{5.56\times0.00715}\)

x = 181.1 g/mol

Hence, the molecular weight of substance will be 181.1g/mol.

वह लिगेंड जिसमें केंद्र धातु परमाणु या आयन से दो परमाणु बंध बनाने में समर्थ होते है उसे द्वि दंतुक लिगेंड कहते है अर्थात इस लिगेण्ड में दो दाता परमाणु उपस्थित रहते है , एथेन-1,2- डायएमीन आदि द्विदंतुक लिगेण्ड के उदाहरण है|