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#?

The do…while loop always executes in reverse order.

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

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

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 loop is skipped and does not execute.

The program throws an error.

The loop executes once before checking the condition again.

The loop enters an infinite loop.

None

What is the purpose of a do…while loop?

To skip loop iterations based on a condition.

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

To run indefinitely without any condition.

To terminate a loop early if a condition is met.

None

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

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

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

while () { /* code */ }

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

None

When does a do…while loop terminate?

When the loop encounters a continue statement.

When a loop variable exceeds 100.

When the conditional expression evaluates to false.

When the loop has run a fixed number of times.

None

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

int i = 10;

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

1 time

9 times

10 times

0 times

None

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

To exit the loop before the condition becomes false.

To skip to the next iteration of the loop.

To run the loop in reverse.

To restart the loop from the beginning.

None

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

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

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

It exits the loop completely.

It resets the loop to the initial 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);
}

0 times

10 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?

foreach

do…while

while

for

None

12.

When does a while loop skip its body entirely?

When the continue statement is used.

When the loop runs an infinite number of times.

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

When the condition evaluates to false before the first iteration.

None