Multiple Choice

1. What type of loop should we use to request 10 numbers from the user as input?

   • A while loop

   • A for loop

   • A do while loop

   • You do not need a loop for this

2. What type of loop is depicted below?

   

   • A while loop

   • A for loop

   • A do while loop

   • This is not a loop

3. How do we call the part int i = 0 in the code snippet below?

    for (int i = 0; i < 10; i++) {
      System.out.println("Hello");
    }

   • The increment step

   • The initialization

   • The conditional check

   • The iteration

4. You wish to generate random numbers until you reach a number that is divisible by 9. What type of loop statement would your require for this?

   • A do while loop

   • A for loop

   • A while loop

   • You do not need a loop for this

5. What is the output of the following code snippet?

    for (int i = 0; i < 10; i+=3) {
      System.out.println(i + " ");
    }

   • 0 1 2 3 4 5 6 7 8 9

   • 0 3 6 9 12

   • 0 3 6 9

   • 3 6 9

6. This is a(n) ...

    while (true) {
      // Do something
    }

   • endless loop

   • bug

   • syntax error

   • a loop that will never execute

7. To what does the output of this code snippet refer?

    for (int i = 1; i < 8; i++) {
      if (i % 7 == 0) {
        System.out.print(" ... Ba");
      } else {
        System.out.print("NaN");
      }
    }
    if (5 * 5 >= 25) {
      System.out.print("tm");
    }
    System.out.println("an");

   • Something important that happened in Belgium

   • A song of Samson en Gert

   • The history of the Internet

   • A movie

8. What is the last value of i that will be outputted to the terminal?

    int i = 0;
    do {
        System.out.println("i = " + i);
        i += 5;
    } while (i < 88);

   • 0

   • 85

   • 88

   • 90

9. In which of the situations below could you use a for-each loop?

   • When you want to print each element from an array to the terminal

   • When you wish to print each element from an array together with it's index

   • When you wish to manipulate the values inside an array

   • When you wish to iterate over multiple arrays

10. Which construct is preferred in the following situation?

    I wish to read a file line by line and stop at the first line that starts with the word "The".

    • A for loop

    • A while loop

    • A foreach loop (enhanced for loop)

    • A switch case

11. What is the output of the following piece of code?

    int i = 0;
    System.out.println("i = " + i + " before for loop");
    for (; i < 3; i++) {
      System.out.println(i + ": Hello");
    }
    System.out.println("i = " + i + " after for loop");

    • Option A:

    i = 0 before for loop
    0: Hello
    1: Hello
    2: Hello
    i = 3 after for loop

    • Option B:

    i = 0 before for loop
    0: Hello
    1: Hello
    2: Hello
    i = 2 after for loop

    • Option C:

    i = 0 before for loop
    0: Hello
    1: Hello
    2: Hello
    3: Hello
    i = 3 after for loop

    • None of the above

12. What is the problem with the code below (you can safely assume that the necessary imports are made)?

    public static void main(String[] args) {
      Scanner console = new Scanner(System.in);
    
      for (int i = 0; i < 5; i++) {
        System.out.print("Please enter number: ");
        int number = console.nextInt();
        sum += number;
      }
    
      System.out.println("\nTotal = " + sum);
    }

    • A variable that was not declared

    • A syntax error

    • An uninitialized variable

    • An incorrect datatype for the variable

13. What construction is depicted below?

    

    • A for loop

    • A while loop

    • An if statement

    • An if-else statement

14. Take the code construct below as a reference. In what order are the different parts of a for-loop executed/evaluated?

    for (<Initialization>; <Condition>; <Increment>) {
      // <Code block>
    }

    • Option A

    (1) Initialization
    (2) Condition
    (3) Code block
    (4) Increment

    • Option B

    (1) Initialization
    (2) Code block
    (3) Increment
    (4) Condition

    • Option C

    (1) Initialization
    (2) Condition
    (3) Increment
    (4) Code block

    • Option D

    (1) Initialization
    (2) Increment
    (3) Code block
    (4) Condition