Multiple Choice

1. What has the same result as counter++?

   • counter += 2;

   • counter += counter + 1;

   • counter = counter + 2;

   • counter = counter + 1;

2. What is the result of 89 % 4?

   • 1

   • 2

   • 4

   • 5

3. What is the result of number after int number = 7.0 / 2.0;?

   • 3.5

   • 3.0

   • 3

   • 4

4. What is a valid value for a boolean?

   • true

   • undefined

   • not

   • nill

5. Suppose you want to store the age of your dog in a variable (the years). What would be the most obvious datatype for this?

   • Scanner

   • String

   • char

   • int

6. What is the result of 11 / 5?

   • 0

   • 1

   • 2

   • 3

7. What is the correct definition of a primitive datatype?

   • A datatype that is integrated directly into the programming language

   • A datatype in Java that can only be used to save bytes

   • A datatype that can only save integral values

   • A datatype where the name starts with a lowercase letter

8. Which of the data types below is not a primitive datatype?

   • int

   • byte

   • float

   • String

9. What is the result of 83 % 4?

   • 0

   • 1

   • 2

   • 3

10. What is the resulting value in q?

    int x = 5;
    int y = 2;
    double q = (double) x / y;

    • 2

    • 2.0

    • 2.5

    • 3

11. What is the most correct and complete definition of a variable?

    • A variable is a symbolic name for a location in memory where the actual data resides.

    • A variable is a symbolic name for a location in memory where the actual data resides with a size determined by the datatype of that variable.

    • A variable is a symbolic name for a location in memory where the actual data resides with a size determined by the value with which the variable was initialized.

    • A variable is a symbolic name for a location in memory where the actual data resides with a size that is not constant.

12. Why are the operators +, -, *, /, ... called binary operators?

    • Because they are also applicable on binary numbers

    • Because they operandi are represented as binary numbers internally

    • Because they require two operandi

    • Because they exist in two versions, a prefix notation and postfix notation

13. Which of the following code blocks makes use of compound operators?

    // Code block A
    int x = ( 25 / 3 ) * (15 % 4);

    // Code block B
    int z = 0;
    for (int i = 0; i < 5; i++) {
      int y = i + 5;
      z++;
    }

    // Code block C
    double vatPercent = 21;
    double priceTag = 55;
    double vat = priceTag * vatPercent / 100;

    // Code block D
    int x = 32;
    int y = 88;
    
    while (x <= 1000) {
      x += 5;
    }

    • Code block A

    • Code block B

    • Code block C

    • Code block D

14. Which of the following code snippets will not result in the value of b incrementing with 1?

    • Snippet A

    int x = 15;
    int b = 3;
    x = b++;

    • Snippet B

    int x = 15;
    int b = 3;
    x += (++b);

    • Snippet C

    int x = 15;
    int b = 3;
    x = (b + 1);

    • Snippet D

    int x = 15;
    int b = 3;
    b += 1;