CS402 T05

1. What is the purpose of a while loop in Java?

• To execute a block of code once

• To execute a block of code multiple times based on a condition

• To define a constant variable

• To define an array

2. How does a do-while loop differ from a while loop?

• It does not check the condition at all

• It checks the condition before the loop body executes

• It executes the loop body at least once before checking the condition

• It only works with numeric values

3. Which of the following terminates a loop immediately?

• continue

• break

• return

• exit

4. What is the output of the following code?

int count = 0;

while (count < 4) {

System.out.println("Hello");

count++;

}

• Hello
  Hello

• Hello
  Hello
  Hello

• Hello
  Hello
  Hello
  Hello

• No output

5. Which loop is most suitable for reading user input until a sentinel value is entered?

• for loop

• while loop

• do-while loop

• Nested loop

6. What does the continue statement do in a loop?

• Exits the loop

• Restarts the loop

• Ends the loop

• Skips the current iteration and continues with the next

7. What will be the value of sum after this loop executes?
int sum = 0;

for (int i = 1; i <= 5; i++) {

sum += i;

}

• 5

• 10

• 15

• 20

8. Which of the following is an infinite loop?

• while (true) {}

• for (int i = 0; i < 5; i++) {}

• for (int i = 0; i < 1; i++) {}

• do {} while (false);

9. What is the output of this code?
for (int i = 1; i < 4; i++) {

System.out.print(i + " ");

}

• 1 2 3

• 0 1 2

• 1 2 3 4

• 1 2

10. What will be the output of the following code?
int count = 0;

do {

System.out.println("Java ");

count++;

} while (count < 2);

• No output

• Java

• Java Java

• Java Java Java