Java 1 (with bitwise and shift)

What are the two main types of data types in Java?

• Primitive and Composite
• Primitive and Reference
• Integer and Floating-point
• Static and Dynamic

Answer explanation

Java has primitive data types (e.g., int, boolean) and reference data types (e.g., objects, arrays).

Which of the following is NOT a primitive data type in Java?

• int
• float
• String
• boolean

Answer explanation

String is a reference type, not a primitive.

What is the default value of a reference variable in Java?

• 0
• null
• "" (empty string)
• Undefined

Answer explanation

Reference variables default to null, meaning they do not reference an object until initialized.

What is the size of an int in Java?

• 8 bits
• 16 bits
• 32 bits
• 64 bits

Answer explanation

Java int is always 32-bit signed.

What will System.out.println(10 / 4); print?

• 2
• 2.5
• 3
• 2

Answer explanation

Integer division truncates the decimal, so 10 / 4 results in 2.

What will System.out.println(5 & 3); print?

• 1
• 2
• 3
• 5

Answer explanation

5 in binary = 0101, 3 in binary = 0011. 0101 & 0011 = 0001 (which is 1).

What will System.out.println(true || false && false); print?

• true
• false
• Compilation error
• NullPointerException

Answer explanation

&& has higher precedence than ||, so it evaluates as true || (false && false) → true || false → true.

What will be the result of System.out.println(9 >> 1);?

• 4
• 5
• 9
• 18

Answer explanation

9 in binary is 1001. A right shift (>> 1) divides it by 2: 1001 → 0100 (4 in decimal).

What will System.out.println(5 ^ 3); print?

• 1
• 6
• 2
• 8

Answer explanation

5 in binary = 0101, 3 in binary = 0011. 0101 ^ 0011 = 0110 (which is 6).

What will System.out.println((5 > 3) ? "Yes" : "No"); print?

• Yes
• No
• true
• false

Answer explanation

Since 5 > 3 is true, the ternary operator returns 'Yes'.