7 Lecture

1. Which of the following statements is true about the do-while loop? A. The loop condition is evaluated before the loop body is executed B. The loop body is executed at least once before the loop condition is evaluated C. The loop executes only if the condition is true D. The loop executes only if the condition is false

Answer: B

2. Which loop executes at least once? A. While loop B. For loop C. Do-while loop D. None of the above

Answer: C

3. What is the syntax for a do-while loop? A. do { loop body } while (condition); B. while (condition) { loop body } C. for (initialization; condition; increment) { loop body } D. None of the above

Answer: A

4. What is the purpose of the do-while loop? A. To execute a block of code repeatedly based on a condition B. To execute a block of code only if the condition is true C. To execute a block of code only if the condition is false D. None of the above

Answer: A

5. What happens if the condition of the do-while loop is false from the beginning? A. The loop body is executed once B. The loop body is not executed at all C. The loop body is executed indefinitely D. None of the above

Answer: A

6. Which statement is used to exit a loop immediately? A. if statement B. break statement C. continue statement D. None of the above

Answer: B

7. Which statement is used to skip the current iteration of a loop and move on to the next one? A. if statement B. break statement C. continue statement D. None of the above

Answer: C

8. What is the difference between a while loop and a do-while loop? A. The loop body is executed before the loop condition in the while loop, and vice versa in the do-while loop B. The loop condition is checked before the loop body in the while loop, and vice versa in the do-while loop C. There is no difference between them D. None of the above

Answer: B

9. Can a do-while loop be nested inside another loop? A. Yes B. No C. It depends on the programming language D. None of the above

Answer: A

10. Which loop structure is best suited for situations where the number of iterations is known in advance? A. while loop B. do-while loop C. for loop D. None of the above

Answer: C

1. What is a do-while loop? Answer: A do-while loop is a type of loop structure in programming that executes a block of code at least once before checking a condition to determine if the loop should continue.

2. What is the syntax for a do-while loop? Answer: The syntax for a do-while loop is: do { // loop body } while (condition);

3. How does the do-while loop differ from other loop structures? Answer: The do-while loop ensures that the loop body is executed at least once, even if the condition is initially false, whereas other loop structures may not execute the loop body at all if the condition is false from the beginning.

4. What happens if the condition of a do-while loop is false? Answer: If the condition of a do-while loop is false, the loop will exit after executing the loop body at least once.

5. How can you exit a do-while loop immediately? Answer: You can use the break statement to exit a do-while loop immediately.

6. How can you skip the current iteration of a do-while loop and move on to the next one? Answer: You can use the continue statement to skip the current iteration of a do-while loop and move on to the next one.

7. Can a do-while loop be nested inside another loop? Answer: Yes, a do-while loop can be nested inside another loop.

8. What is an infinite loop? Answer: An infinite loop is a loop structure that executes indefinitely because the loop condition is never false.

9. How can you prevent an infinite loop from occurring in a do-while loop? Answer: You can prevent an infinite loop from occurring in a do-while loop by ensuring that the loop condition eventually becomes false.

10. What is the difference between a do-while loop and a while loop? Answer: The main difference between a do-while loop and a while loop is that the loop body of a do-while loop is executed at least once, whereas the loop body of a while loop may not be executed at all if the condition is false from the beginning.

A do-while loop is a control flow statement that is used in programming to execute a block of code repeatedly. The difference between a do-while loop and a while loop is that a do-while loop will always execute the loop body at least once, even if the condition is false from the beginning. The syntax for a do-while loop is as follows: do { // loop body } while (condition); The loop body is executed first, and then the condition is checked. If the condition is true, the loop body is executed again. This process continues until the condition becomes false. One of the primary benefits of using a do-while loop is that it guarantees that the loop body will be executed at least once. This can be useful when you need to perform a task that must be executed at least once, such as reading input from a user or initializing variables. Another advantage of a do-while loop is that it is useful for situations where you want to perform an action until a certain condition is met. For example, if you are writing a program that checks user input until the user enters a valid response, a do-while loop can be an effective way to accomplish this. However, it is important to be cautious when using a do-while loop, as it can lead to infinite loops if the condition is never met. To avoid this, it is important to ensure that the condition will eventually become false. In addition, you can use the break statement to exit a do-while loop immediately if a certain condition is met, or the continue statement to skip the current iteration of the loop and move on to the next one. Overall, the do-while loop is a useful control flow statement in programming that can help you execute a block of code repeatedly until a certain condition is met, while ensuring that the loop body is executed at least once.