Java Loops Quiz

Which of the following is NOT a loop in Java?

• for

• while

• loop

• do-while

What is the syntax of a for loop?

• for(initialization; condition; increment) { }

• for(condition; initialization; increment) { }

• for(increment; condition; initialization) { }

• for(initialization, increment, condition) { }

What will be the output of the following code? for(int i = 0; i 0) { i--; System.out.println(i); }

• 5 4 3 2 1 0

• 4 3 2 1 0

• 5 4 3 2 1

• 4 3 2 1

A while loop executes:

• At least once

• Zero or more times

• Only once

• Infinite times

Which statement is true about a do-while loop?

• The loop executes only once

• The condition is checked before execution

• The loop executes at least once

• It never executes

What will be the output? int i = 1; do { System.out.print(i + " "); i++; } while (i < 4);

• 1 2 3

• 1 2 3 4

• 1 2

• Infinite loop

Which loop is best when the number of iterations is unknown?

• for

• while

• do-while

• switch

What will be the output? for(int i=1; i<=2; i++) { for(int j=1; j<=3; j++) { System.out.print(i + "," + j + " "); } }

• 1,1 1,2 1,3 2,1 2,2 2,3

• 1,1 2,1 3,1 1,2 2,2 3,2

• 1,1 1,2 2,1 2,2 3,1 3,2

• None

Which loop can be nested inside another loop?

• for

• while

• do-while

• All of the above

What is the output? for(int i=1; i<=2; i++) { for(int j=1; j<=i; j++) { System.out.print("* "); } System.out.println(); }

• *

• **

• * *

• ** **