Control Structures: Interactive Quizzes for Year 9 ICT Students

Question 1

What is the difference between a do-while loop and a while loop?

Accepted Answer

A do-while loop executes the loop body at least once, while a while loop may not execute it at all

Answer

A do-while loop checks the condition before executing the loop body, while a while loop checks it after

Answer

A do-while loop is more efficient than a while loop

Answer

There is no difference between a do-while loop and a while loop

Question 2

Which of the following is a valid way to declare a loop variable in Python?

Accepted Answer

i = 0

Answer

loop_var = 0

Answer

for i = 0

Answer

var i = 0

Question 3

What is the purpose of a continue statement within a loop?

Accepted Answer

To skip the current iteration of the loop and continue with the next one

Answer

To terminate the loop immediately

Answer

To increment the loop counter

Answer

To decrement the loop counter

Question 4

Which of the following loops will execute the code block indefinitely?

Accepted Answer

while True:

Answer

for i in range(10):

Answer

for i in range(1, 11):

Answer

for i in range(10, 0, -1):

Question 5

Which of the following switch statement cases will match the input value 'B'?

Accepted Answer

case 'B':

Answer

case 'A':

Answer

case 'C':

Answer

default:

Question 6

Which of the following is NOT a logical operator?

Accepted Answer

if

Answer

and

Answer

or

Answer

not

Question 7

Which of the following is NOT a keyword used to implement control structures in programming?

Accepted Answer

and

Answer

if

Answer

else

Answer

while

Question 8

Which of the following is a valid switch statement case in Java?

Accepted Answer

case 'A':

Answer

case 10.0:

Answer

case Monday:

Answer

case true:

Question 9

What is the purpose of the break statement within a switch statement?

Accepted Answer

To terminate the execution of the switch statement

Answer

To move to the next case statement

Answer

To evaluate the next condition

Answer

To increment the switch variable

Question 10

The _____ statement executes a block of code only when a specified condition is true.

Accepted Answer

If

Answer

Else

Answer

While

Answer

Until

Question 11

Which of the following is NOT a type of loop structure?

Accepted Answer

Decision loop

Answer

For loop

Answer

While loop

Answer

Do while loop

Question 12

A(n) _____ structure repeatedly executes a block of code until a certain condition is met.

Accepted Answer

Loop

Answer

Sequence

Answer

Selection

Answer

Switch

Question 13

A(n) _____ statement executes different blocks of code based on the value of a specified variable.

Accepted Answer

Switch

Answer

Decision

Answer

Select

Answer

Case

Question 14

In a switch statement, which keyword is used to specify a particular case?

Accepted Answer

Case

Answer

Default

Answer

Option

Answer

Statement

Question 15

Which control structure executes a block of code repeatedly until a condition becomes false?

Accepted Answer

Loop

Answer

Sequence

Answer

Selection

Answer

Switch

Question 16

A common application of loop structures is:

Accepted Answer

Iterating over a list

Answer

Making calculations

Answer

Displaying information

Answer

Storing data

Question 17

Which of the listed options is NOT a type of control structure?

Accepted Answer

Concurrency

Answer

If-else statements

Answer

Loops

Answer

Switch statements

Question 18

What is the purpose of an if-else statement?

Accepted Answer

To execute one set of instructions if a condition is true, otherwise execute a different set of instructions

Answer

To repeat a set of instructions until a condition is met

Answer

To switch between different tasks

Answer

To store data

Question 19

In Python, what is the correct syntax for an if-else statement?

Accepted Answer

if (condition): { ... } else: { ... }

Answer

if condition { ... } else { ... }

Answer

when condition { ... } else { ... }

Answer

if condition : { ... } else { ... }

Question 20

What is the difference between a while loop and a for loop?

Accepted Answer

A while loop executes until a condition becomes false, while a for loop executes a set number of times

Answer

A for loop executes until a condition becomes false, while a while loop executes a set number of times

Answer

There is no difference between a while loop and a for loop

Answer

A while loop is more efficient than a for loop

Question 21

What is the primary function of the break statement in a loop?

Accepted Answer

To immediately end the loop's execution

Answer

To continue executing the loop indefinitely

Answer

To skip the current iteration of the loop

Answer

To increment the loop variable's value

Question 22

Which of the following best describes a recommended practice when utilizing control structures?

Accepted Answer

Indentation within control structures improves code readability.

Answer

Employing a variety of control structures can enhance code complexity.

Answer

Restricting oneself to a single control structure type throughout a program is advisable.

Answer

Control structures should be avoided entirely.

Question 23

In Python, which operator is used to compare the equality of two values?

Accepted Answer

==

Answer

=

Answer

!=

Answer

>

Question 24

What is the primary purpose of a loop in programming?

Accepted Answer

To execute a block of code repeatedly.

Answer

To make choices based on specified conditions.

Answer

To store and organize data.

Answer

To display information.

Question 25

Which type of loop is suitable when the number of iterations is predetermined?

Accepted Answer

For loop

Answer

While loop

Answer

Do-while loop

Answer

Indefinite loop

Question 26

Which of the following options represents a valid switch statement syntax in Java?

Accepted Answer

switch (variable) {

Answer

switch variable {

Answer

switch (variable): {

Answer

switch variable:

Question 27

Which of the following options is not considered a control structure in Python?

Accepted Answer

function

Answer

if-else

Answer

loop

Answer

switch

Question 28

What is the primary purpose of a nested control structure?

Accepted Answer

To control the flow of a program within another control structure.

Answer

To execute a set of instructions repeatedly within a loop.

Answer

To make choices based on conditions within another if-else statement.

Answer

To store data within another data structure.

Question 29

Which of the following is an example of a logical operator used to check if two conditions are both true at the same time?

Accepted Answer

&&

Answer

+

Answer

/

Answer

%

Question 30

What is the primary function of a break statement when used within a loop?

Accepted Answer

To immediately terminate the loop

Answer

To continue the execution of the loop

Answer

To skip the current iteration of the loop

Question 31

Which control structure allows for executing different code blocks based on the evaluation of multiple conditions?

Accepted Answer

Switch statement

Answer

If-else statement

Answer

Loop

Question 32

What is the key difference between a pre-test loop and a post-test loop?

Accepted Answer

A pre-test loop checks the condition before executing the loop body while a post-test loop checks it afterwards.

Answer

A post-test loop checks the condition before executing the loop body while a pre-test loop checks it afterwards.

Answer

They both check the condition at the same time.

Question 33

What will be the output of the following Python code: for i in range(1, 6): print(i)

Accepted Answer

1 2 3 4 5

Answer

12345

Answer

1 to 5

Question 34

Which of the following is NOT an advantage of using control structures in programming?

Accepted Answer

Reduced program memory usage

Answer

Improved code readability

Answer

Increased code reusability

Question 35

Consider the following code snippet:
if (x == 5) and (y > 3):
    print("Condition 1 and Condition 2 are both True")

What is the output of this code snippet, and when does it occur?

Accepted Answer

The statement is printed when both x equals 5 and y is greater than 3.

Answer

The statement is printed when either x equals 5 or y is greater than 3.

Answer

The statement is never printed.

Answer

The output of the code snippet depends on the values of x and y.

Question 36

Which control structure allows you to execute code only when a specific condition is true?

Accepted Answer

If-else statement

Answer

Loop

Answer

Switch statement

Answer

Variable declaration

Question 37

Which of the following is correct Python syntax for an if-else statement?

Accepted Answer

if condition:
  statement
else:
  statement

Answer

if (condition):
  statement

Answer

if condition then
  statement
else
  statement

Answer

if condition =
  statement
else:
  statement

Question 38

What's the key difference between a 'while' loop and a 'for' loop?

Accepted Answer

A 'while' loop continues until a condition becomes false, while a 'for' loop repeats a fixed number of times.

Answer

A 'for' loop continues until a condition becomes false, while a 'while' loop repeats a fixed number of times.

Answer

There's no difference between a 'while' loop and a 'for' loop.

Answer

A 'while' loop is used for indefinite loops, while a 'for' loop is used for loops with a known number of iterations.

Question 39

What is the primary purpose of a 'switch' statement?

Accepted Answer

To execute different code based on the value of a variable.

Answer

To iterate through a sequence of values.

Answer

To execute code conditionally.

Answer

To terminate a program.

Question 40

Discuss the advantages of using nested control structures. Give an example of a situation where nested control structures would be beneficial.

Accepted Answer

Nested control structures improve code readability and flexibility.

Answer

Nested control structures always enhance code efficiency.

Answer

Nested control structures should be avoided in all cases.

Answer

Nested control structures are only useful for simple programs.

Question 41

Which control structure is used to execute a block of code only if a specified condition is true?

Accepted Answer

If-else statement

Answer

Switch statement

Answer

For loop

Answer

While loop

Question 42

Which control structure is used to execute a block of code repeatedly until a specified condition becomes false?

Accepted Answer

While loop

Answer

If-else statement

Answer

Switch statement

Answer

For loop

Question 43

Which control structure is used to execute a block of code a specified number of times?

Accepted Answer

For loop

Answer

Switch statement

Answer

If-else statement

Answer

While loop

Question 44

Which control structure is used to select from different code blocks based on the value of a variable?

Accepted Answer

Switch statement

Answer

While loop

Answer

For loop

Answer

If-else statement

Question 45

Which of the following best describes the purpose of control structures?

Accepted Answer

To control the flow of execution in a program

Answer

To display output

Answer

To perform calculations

Answer

To store data

Question 46

Which of the following code snippets correctly uses an if-else statement?

Accepted Answer

if (x > 0) { ... } else { ... }

Answer

for (x > 0; ; ) { ... }

Answer

switch (x) { ... }

Answer

while (x > 0) { ... }

Question 47

Which of the following code snippets correctly uses a while loop?

Accepted Answer

while (x < 10) { ... }

Answer

for (x < 10; ; ) { ... }

Answer

if (x < 10) { ... }

Answer

switch (x) { ... }

Question 48

Which of the following code snippets correctly uses a for loop to iterate three times?

Accepted Answer

for (var i = 0; i < 3; i++) { ... }

Answer

switch (i) { ... }

Answer

if (i < 3) { ... }

Answer

while (i < 3) { ... }

Question 49

Which of the following code snippets correctly uses a switch statement?

Accepted Answer

switch (choice) { ... }

Answer

for (choice; ; ) { ... }

Answer

if (choice) { ... }

Answer

while (choice) { ... }