C# do … while Quiz – Answertopia

Welcome to the C# Looping with do and while Statements Quiz! This quiz is designed to test your understanding of the while and do…while loops in C#. You will explore key concepts such as loop structure, conditional expressions, the differences between while and do…while loops, and the use of break and continue statements. These loops are essential tools for repeating code until specific conditions are met, and this quiz will help reinforce your knowledge on how and when to use them.

What is the primary difference between a while loop and a do…while loop in C#?

There is no difference; both loops function the same way.

The while loop evaluates the condition before executing the loop body, while the do…while loop evaluates it after.

The do…while loop always executes in reverse order.

The while loop can only be used with integers, while the do…while loop works with any data type.

None

What happens if the condition in a while loop is initially false?

The program throws an error.

The loop executes once before checking the condition again.

The loop enters an infinite loop.

The loop is skipped and does not execute.

None

What is the purpose of a do…while loop?

To terminate a loop early if a condition is met.

To run indefinitely without any condition.

To ensure that the loop body executes at least once before checking the condition.

To skip loop iterations based on a condition.

None

Which of the following correctly defines the syntax of a C# while loop?

do { /* code */ } while ();

foreach (var item in collection) { /* code */ }

while () { /* code */ }

for (initializer; condition; increment) { /* code */ }

None

When does a do…while loop terminate?

When the conditional expression evaluates to false.

When the loop has run a fixed number of times.

When a loop variable exceeds 100.

When the loop encounters a continue statement.

None

In the following code, how many times will the loop execute?

int i = 10;

do {
 i--;
} while (i > 0);

9 times

10 times

0 times

1 time

None

What is the purpose of the break statement in a while or do…while loop?

To restart the loop from the beginning.

To exit the loop before the condition becomes false.

To run the loop in reverse.

To skip to the next iteration of the loop.

None

What happens when the continue statement is used in a while loop?

It skips the remaining code in the current iteration and moves to the next iteration.

It resets the loop to the initial condition.

It exits the loop completely.

It runs the loop one more time, regardless of the condition.

None

In the following code, what value of i will trigger the break statement and exit the loop?

int i = 0;
int j = 5;

while (i < 100) {
 i++; 
 if (i == j) 
 break;
}

100

None

10.

How many times will the following loop print the value of i?

int i = 1;

while (i < 20) {
 i++;
 if ((i % 2) != 0)
 continue;

 Console.WriteLine(&quoti = &quot + i);
}

10 times

0 times

9 times

19 times

None

11.

Which loop should you use if you know that the code inside the loop must be executed at least once?

for

while

do…while

foreach

None

12.

When does a while loop skip its body entirely?

When the condition evaluates to false before the first iteration.

When the loop runs an infinite number of times.

When the continue statement is used.

When the break statement is encountered at the start of the loop.

None