Control Flow: Master the Art of Program Execution

Question 1

In Python, what does the 'continue' statement do when used within a loop?

Accepted Answer

Skips the remaining code in the current iteration and moves to the next.

Answer

Ends the current loop and proceeds to the next iteration.

Answer

Causes the loop to repeat indefinitely, continuously executing the same code block.

Question 2

Which control flow statement is used to exit a loop early, skipping any remaining code in the loop's body?

Accepted Answer

break

Answer

return

Answer

switch

Answer

continue

Question 3

Which control flow statement is used to iterate over a block of code a fixed number of times?

Accepted Answer

for

Answer

do-while

Answer

while

Answer

switch

Question 4

Which control flow statement is used to execute different code paths based on the value of a multi-way conditional expression?

Accepted Answer

switch

Answer

for

Answer

while

Answer

if

Question 5

Which control flow statement is used to skip the remaining code in the loop's body and continue with the next iteration?

Accepted Answer

continue

Answer

break

Answer

return

Answer

switch

Question 6

Which control flow statement repeats a block of code even if a condition within the loop becomes true?

Accepted Answer

do-while

Answer

for

Answer

while

Answer

if

Question 7

Which control flow statement ensures that a block of code is executed at least once, regardless of whether a condition is met?

Accepted Answer

do-while

Answer

while

Answer

if

Answer

for

Question 8

Which control flow statement is used to repeatedly execute a set of instructions until a specified condition is no longer met?

Accepted Answer

Looping statement

Answer

Decision statement

Answer

Branching statement

Answer

Conditional statement

Question 9

What is the primary purpose of a conditional statement?

Accepted Answer

To control the execution of code based on whether a given condition is true or false

Answer

To iterate over a sequence of elements

Answer

To transfer control to a different part of the program

Question 10

What is the correct syntax for an if-else statement in JavaScript?

Accepted Answer

if (condition) { statement_if_true } else { statement_if_false }

Answer

{ if (condition) statement_if_true } else statement_if_false

Answer

if condition statement_if_true fi else statement_if_false

Answer

if condition: statement_if_true otherwise statement_if_false

Question 11

Which type of loop will execute a block of code a predetermined number of times?

Accepted Answer

For loop

Answer

Do-while loop

Answer

While loop

Answer

Foreach loop

Question 12

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

Accepted Answer

A do-while loop will execute the code block at least once, regardless of the initial condition, while a while loop may skip the block if the initial condition is false.

Answer

A while loop will execute indefinitely, while a do-while loop will only execute a fixed number of times.

Question 13

Which of the following is a common use case for a switch statement?

Accepted Answer

To select the appropriate action based on the value of a given expression

Answer

To iterate through a sequence of elements

Answer

To control the execution of code based on a boolean condition

Question 14

What is the main purpose of using a break statement within a loop or switch statement?

Accepted Answer

To terminate the execution of the loop or switch statement immediately

Answer

To skip the current iteration of the loop or switch statement

Answer

To continue the execution of the loop or switch statement

Question 15

Which best practice is essential when using control flow statements?

Accepted Answer

Use appropriate indentation to enhance the readability and maintainability of your code

Answer

Avoid using control flow statements to minimize code complexity

Answer

Utilize as many control flow statements as possible to optimize code efficiency

Question 16

In Python, which statement is used to execute code only if a certain condition is met?

Accepted Answer

if statement

Answer

break statement

Answer

while loop

Answer

for loop

Question 17

Which operator is used in JavaScript to check if two values are not equal?

Accepted Answer

!=

Answer

==

Answer

>

Answer

===

Question 18

In Python, which looping statement is used to iterate through a collection of items in a sequence?

Accepted Answer

for loop

Answer

if statement

Answer

while loop

Answer

switch statement

Question 19

In C++, which statement is used to immediately exit a loop or switch statement?

Accepted Answer

break

Answer

continue

Answer

switch

Answer

return

Question 20

Which control flow statement conditionally executes code based on a given expression?

Accepted Answer

if statement

Answer

case statement

Answer

for loop

Answer

while loop

Question 21

Which control flow statement transfers program execution to a specific location?

Accepted Answer

goto statement

Answer

continue statement

Answer

break statement

Answer

if statement

Question 22

In Java, which looping statement is used to iterate through the elements of an array?

Accepted Answer

for-each loop

Answer

while loop

Answer

do-while loop

Answer

for loop

Question 23

In Python, which control flow statement is used to handle errors and exceptions?

Accepted Answer

try-except-finally block

Answer

if statement

Answer

for loop

Answer

while loop

Question 24

Which looping statement is used in Python to iterate over a range of numbers?

Accepted Answer

range-based for loop

Answer

do-while loop

Answer

while loop

Answer

for loop

Question 25

Which control flow statement allows a program to execute a block of code multiple times while a specified condition remains true?

Accepted Answer

Loop

Answer

Branch

Answer

Jump

Answer

Selection

Question 26

What is the primary purpose of a conditional statement?

Accepted Answer

To execute different code paths based on whether a specified condition is met

Answer

To jump to a specific line of code

Answer

To pause the execution of a program

Answer

To terminate the execution of a program

Question 27

Which branching statement enables a program to transfer execution to a specific point within the code?

Accepted Answer

Goto

Answer

Continue

Answer

Break

Answer

Switch

Question 28

What is the key difference between a do-while loop and a while loop in terms of execution?

Accepted Answer

A do-while loop executes its code block at least once, regardless of whether the condition is initially true, while a while loop only executes its code block if the condition is initially true.

Answer

A while loop can only have one condition, while a do-while loop can have multiple conditions.

Answer

A while loop executes its code block until the condition becomes false, while a do-while loop executes its code block until the condition becomes true.

Answer

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

Question 29

Which of the following is not a valid control flow statement?

Accepted Answer

Skip

Answer

Switch

Answer

For

Answer

If

Question 30

What will be printed to the console when the following code is executed: if (true) { System.out.println("Hello"); }

Accepted Answer

Hello

Answer

Nothing

Answer

Error

Answer

Goodbye

Question 31

What is the primary purpose of a break statement?

Accepted Answer

To terminate the execution of the enclosing loop or switch statement

Answer

To jump to a specific line of code

Answer

To continue the execution of the loop or switch statement

Answer

To pause the execution of the loop or switch statement

Question 32

Explain the difference between a prefix increment operator (++) and a postfix increment operator (++x).

Accepted Answer

A prefix increment operator increments the value of a variable before it is used in an expression, while a postfix increment operator increments the value of a variable after it is used in an expression.

Answer

Prefix and postfix increment operators are interchangeable

Answer

Postfix increment operators are more commonly used than prefix increment operators

Answer

Prefix increment operators are faster than postfix increment operators

Question 33

In the Python programming language, which statement is used for conditional execution?

Accepted Answer

if

Answer

exit

Answer

repeat

Answer

until

Question 34

What is the primary function of a loop in programming?

Accepted Answer

To execute a block of code repeatedly until a specified condition is met or a specified number of iterations is reached.

Answer

To terminate the execution of a program.

Answer

To transfer program execution to a different section of code.

Question 35

In Java, which statement is used for multi-way branching?

Accepted Answer

switch

Answer

continue

Answer

do-while

Answer

else-if

Question 36

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

Accepted Answer

A while loop evaluates the loop condition before executing the loop body, while a do-while loop executes the loop body at least once before evaluating the loop condition.

Answer

While loops are used for definite loops, and do-while loops are used for indefinite loops.

Question 37

What action does the break statement perform within a loop?

Accepted Answer

Terminates the loop and transfers execution to the statement following the loop.

Answer

Repeats the current iteration of the loop.

Answer

Continues the loop from the next iteration.

Answer

Skips the current iteration of the loop.

Question 38

Which of the following is the correct syntax for an if-else statement in C++?

Accepted Answer

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

Answer

if_else (condition) ... else ...

Answer

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

Answer

if (condition) ... else ...

Question 39

In JavaScript, what is the primary purpose of the ternary operator?

Accepted Answer

Provides a concise alternative to the if-else statement, allowing for conditional assignment in a single expression.

Answer

Terminates the execution of a program.

Answer

Declares and initializes a new variable.

Question 40

Which of the following is the correct syntax for a for loop in Python?

Accepted Answer

for variable in range(start, stop[, step]):

Answer

foreach variable in range(start, stop[, step])

Answer

for (range(start, stop[, step]))

Answer

for variable in range(stop, start[, step])

Question 41

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

Accepted Answer

In a pre-test loop, the loop condition is evaluated before executing the loop body, while in a post-test loop, the loop condition is evaluated after executing the loop body.

Answer

Pre-test loops are suitable for definite loops, and post-test loops are suitable for indefinite loops.

Question 42

Which of the following is the correct syntax for a switch statement in Java?

Accepted Answer

switch (expression) { case value1: ...; case value2: ...; default: ... }

Answer

switch { expression } { case value1: ...; case value2: ...; }

Answer

switch (expression) { case value1, value2, ... : ...; }

Answer

switch(expression) { case value1: ...; default: ... }

Question 43

Which statement is used to conditionally execute a block of code based on a given condition?

Accepted Answer

if-else

Answer

while

Answer

break

Answer

for

Question 44

What is the primary purpose of the 'break' statement within a loop?

Accepted Answer

To immediately terminate the loop and continue execution after the loop

Answer

To pause the loop temporarily and resume execution later

Answer

To skip the current iteration and continue with the next iteration

Answer

To execute the statement immediately following the loop

Question 45

Which control flow statement allows for the repeated execution of a block of code while a specific condition remains true?

Accepted Answer

While

Answer

If

Answer

Switch

Answer

Try-catch

Question 46

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

Accepted Answer

A 'do-while' loop executes its body at least once, regardless of the initial condition, while a 'while' loop only executes its body if the condition is initially true

Answer

A 'while' loop executes its body at least once, regardless of the initial condition, while a 'do-while' loop only executes its body if the condition is initially true

Answer

A 'do-while' loop executes its body multiple times, regardless of the condition, while a 'while' loop only executes its body once

Question 47

Which branching statement allows for multiple conditional paths based on a specified value, without requiring a cascade of 'if' statements?

Accepted Answer

Switch

Answer

Goto

Answer

If

Answer

For

Question 48

When would it be more appropriate to use a 'for' loop instead of a 'while' loop?

Accepted Answer

When the number of iterations is known in advance

Answer

When the condition is checked at the end of the loop

Answer

When the loop body contains complex statements

Question 49

What is the primary function of the 'continue' statement within a loop?

Accepted Answer

To skip the remaining statements in the current iteration and proceed to the next iteration

Answer

To terminate the loop and continue execution after the loop

Answer

To execute the statement immediately after the loop

Question 50

Which control flow statement allows for conditional execution of multiple blocks of code based on different cases?

Accepted Answer

Switch-case

Answer

While

Answer

If-elseif-else

Answer

For

Question 51

What is a common scenario where a 'do-while' loop would be useful?

Accepted Answer

When input needs to be processed until a specific condition is met

Answer

When the loop body contains only a single statement

Answer

When the exact number of iterations is known