Computer Programming

Question 1

Sequential Structure

Answer 1

Executes a sequence of statements in order.

Question 2

Control structure

Answer 2

Provides alternatives to sequential program and are used to alter the flow of execution

Question 3

2 control structures

Answer 3

Selection structure
Repetition Structure

Question 4

Selection structure

Answer 4

The program executes partical statements depending on the given condition. This alters the flow of program by making a selection or choice.

Question 5

Repetition Structure

Answer 5

The program repeats statement a certain number of times, depending on the given condition. This alters the fliw of program execution by the repetition of one or more statements.

Question 6

One way selection

Answer 6

If
If…else
switch statement

Question 7

If and If…else statements

Answer 7

Used to create one-way, two-way and multiple selections

Question 8

Switch Statement

Answer 8

is used to test a single variablr against a series of values.

Question 9

The syntax for If statement

Answer 9

int score = 70;
if (score >= 60 ) {
System.out.printlb(“The student passed!”);
}

Question 10

The Two-way selection

Answer 10

Used to choose between (2) alternatives. The if…else statement is used to implement two-way selections in Java.

Question 11

The syntax for If…else statement

Answer 11

if ( score >=60)
{
System.out.println(“The student passed!”);
}
else
{
System.out.println(“The student failed!”);
}

Question 12

Compound statements or Block statements

Answer 12

These are any kinfdof statements grouped together within curly braces.

Question 13

Syntax for compound Statement

Answer 13

if (price => 500.00) {
discount = price * 0.10;
salePrice = price - discount;
System.out.println(“The discounted price is “ + salePrice);
}
else {
System.out.println(“No discount!”);
System.out.println(“The price is “ + price”);
}

Question 14

Multiple Selections

Answer 14

When one control statement, either selection or repetition is located within another, it is said to be nested.

Question 15

Nested if statement

Answer 15

allows a program to perform multiple selections

Question 16

Syntax for nested if

Answer 16

if (score => 90){
System.out.println(“The grade is A”);
}
else if (score => 80) {
System.out.println(“The grade is B”);
}
else if (score => 70) {
System.out.println(“The grade is C”);
}
else {
System.out.println(“The grade is D”);
}

Question 17

Short Circuit Evaluation

Answer 17

Is a process which the computer evaluates a logical expression from left to right and stops as soon as the valur of the expression is determined.

Question 18

Switch Statement

Answer 18

Allows a single variable to be tested for equality against a list of values and, depending on its value, executes a certain block of statements.

Question 19

Rules for a switch case

Answer 19

The ff variables are allowed: int, byte, short, char, and String

Question 20

Syntax for Switch Statement

Answer 20

char grade = “A”;
switch (grade)
{
case ‘A’:
System.out.println(“Excellent!”);
break;
case ‘B’:
System.out.println(“Very Good!”);
break;
case ‘C’:
System.out.println(“Good!”);
break;
case ‘D’:
System.out.println(“Satisfactory”);
break;
case ‘E’:
System.out.println(“Failed”);
break;
}

Question 21

While

Answer 21

repeats a block of statements while a given condition evaluates to true

Question 22

Infinite loop

Answer 22

A loop that continues to execute endlessly

Question 23

Syntax for while loop

Answer 23

int num = 0;

while( num<= 10)
{
System.out.ptintln(num);
num++;
}

Question 24

For Loop

Answer 24

executes a sequence of atatements multiple times and abbreviates the code that manages the loop variable. It is used when a definite number of loop iterations is required.

Question 25

Syntax for For Loop

Answer 25

int num;
for (num =0; num<= 10; num++)
{
System.ouy.println(num);
}

Question 26

A do…while loop

Answer 26

Similar to a while loop, except that it executes the loop body first before evaluating the expression.

Question 27

Syntax for do…while loop

Answer 27

int num = 0;

do {
System.out.println(num);
num++;
} while (num <= 10);

Question 28

Break statement

Answer 28

Terminates the loop or switch and transfers the flow of the program to the statements following the loop or switch

Question 29

The continue statement

Answer 29

Causes the loop to skip the remainder of its body and immediately reevaluate its condition, and proceeds with the next iteration of the loop.

Question 30

Nested Control Structure

Answer 30

Are control statements that are placed withing another.

Question 31

String

Answer 31

a sequence of characters.