Java Loops MCQs with answers Page - 5

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A

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Q. Which loop is most suitable for indefinite iteration until a condition is met?

  • (A) for
  • (B) while
  • (C) do-while
  • (D) for-each

A

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Q. Which of the following is not a valid for loop?

  • (A) for(int i=0;i<10;i++)
  • (B) for(;;)
  • (C) for(int i=0;i<10;)
  • (D) for i=0 to 10

A

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Q. Can we nest do-while inside a for loop?

  • (A) Yes
  • (B) No
  • (C) Only in functions
  • (D) Only with labels

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Q. What is printed?
for(int i=1;i<=3;i++){
for(int j=1;j<=i;j++){
System.out.print("*");
}
System.out.println();
}

  • (A) ***
  • (B) * ** ***
  • (C) *** ** *
  • (D) * * *

A

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Q. Which loop is better for validating user input until it is correct?

  • (A) for
  • (B) do-while
  • (C) while
  • (D) for-each

A

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Q. Which loop would be most appropriate to repeat a process exactly 100 times?

  • (A) while
  • (B) do-while
  • (C) for
  • (D) infinite loop

A

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Q. Which of the following loops will execute zero times if the condition is false initially?

  • (A) do-while
  • (B) while
  • (C) for
  • (D) both b and c

A

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Q. What is printed?
for(int i=0;i<3;i++){
if(i==1) break;
System.out.print(i);
}

  • (A) 0
  • (B) 01
  • (C) 012
  • (D) 1

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Q. Can you label a loop in Java and refer to it in break or continue?

  • (A) Yes
  • (B) No
  • (C) Only in methods
  • (D) Only inside try-catch

A

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Q. What will be the output?
for (int i = 1; i <= 5; i++) {
if (i % 2 == 0) continue;
System.out.print(i);
}

  • (A) 12345
  • (B) 135
  • (C) 24
  • (D) 54321

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