Computer Science

Question 1

What is a program made up?

Answer 1

Variable, keyword, operator, punctuation, Data Types,

Question 2

What is a Variable?

Answer 2

Variable names are just the symbolic representation of a memory location.

Question 3

What is a keyword?

Answer 3

Keywords are the reserved words used in programming. Each keywords has fixed meaning and that cannot be changed by user.

Question 4

What is a Arithmetic operator?

Answer 4

Operators are the symbol which operates on value or a variable. For example: + is a operator to perform addition.

Question 5

What is a data type?

Answer 5

Data types are the keywords, which are used for assigning a type to a variable.
Integer types
Floating Type
Character types

Question 6

What are the three primary activities of a program?

Answer 6

Input, processing and output

Question 7

What is a input?

Answer 7

Input is information a program collects from the outside world

Question 8

what is processing?

Answer 8

Performing process on information gathered from input.

Question 9

What is a output?

Answer 9

Output is information a program shows the outside world.

Question 10

The Programming process?

Answer 10

Steps, which include design, testing, and debugging activities.

Question 11

what is Procedural and Object-Oriented Programming?

Answer 11

Two ways of thinking about software development and program design.

Question 12

what is Procedural Programming?

Answer 12

Programmer constructs functions

Question 13

what is Object-Oriented Programming?

Answer 13

Programming element that contains data and the procedures that operate on the data

Question 14

what are The Parts of a C++ Program

Answer 14

Comments, #preprocessor directives, namespace, function, { , strings,
return 0,

Question 15

what is cout object?

Answer 15

This object will display information on the computers screen.

Question 16

what is a #include Directive?

Answer 16

causes the contents of another file to be inserted into the program.

Question 17

what are Literals?

Answer 17

constant value assigned to variable

Question 18

what are Identifiers?

Answer 18

identifiers are names given to variables, functions.

Question 19

Integer data types?

Answer 19

Keyword int is used for declaring the variable with integer type.
either 2 bytes(In older PC’s) or 4 bytes.

Question 20

The char Data Type?

Answer 20

The size of char is 1 byte. Keyword char is used for declaring the variable of character type.

Question 21

Floating-Point Data Types ?

Answer 21

Floating types can hold real values (numbers)

Question 22

size of float ?

Answer 22

precision of float 6 digits

Question 23

size of double?

Answer 23

precision of double is 14 digits.

Question 24

what happens if assign float to int

Answer 24

3.9999 = 3 rounded down

Question 25

what is bool Data Type?

Answer 25

two values (usually denoted true and false)

Question 26

Variable Assignments and Initialization

Answer 26

assign values to variables and once its in its initialized

Question 27

every variable has a scope, what are scopes?

Answer 27

scope are rules where variable may be used.

Question 28

Mathematical Expressions ordinance

Answer 28

negative, * , / , % , +, -

Question 29

Operator Data type Ranking

Answer 29

long double, double, float, unsigned, long, long, unsigned int, int. lower type get converted to higher type.

Question 30

Relational Operators

Answer 30

compare numeric value, and char values. > .< = !=

Question 31

if…else statement.

Answer 31

if (test expression)
statements to be executed if test expression is true;
else
statements to be executed if test expression is false;

Question 32

Flags

Answer 32

a boolean flag is a variable that get the value of either true or false

Question 33

Logical Operators

Answer 33

The logical operators, logical AND (&&) and logical OR (||), are used to combine multiple conditions formed using relational or equality expressions.

Question 34

Menus

Answer 34

showChoices();
		cin >> choice;
		switch (choice)
		{
		case 1:
			cout << "Enter two numbers: ";
			cin >> x >> y;
			cout << "Sum " << add(x,y) <<< "Enter two numbers: ";
			cin >> x >> y;
			cout << "Difference " << subtract(x,y) <<endl;
			break;

Question 35

Validating User Input

Answer 35

are the options for user real?

Question 36

The while Loop

Answer 36

Loops causes program to execute the certain block of code repeatedly until some conditions are satisfied, i.e., loops are used in performing repetitive work in programming.

while (test expression)
{
statements to be executed.
}