IGDTUW 2026 — Computer PYQ

The correct option is (b) 1.

Step-by-Step Explanation:

1. Variable Initialization: An integer variable a is initialized with the decimal value 7.

   int a=7;

2. Understanding the Bitwise AND Operator (&): The expression (a & 1) utilizes the bitwise AND operator. This operator compares corresponding bits of two numbers and returns 1 if both bits are 1, otherwise it returns 0.

3. Binary Conversion and Evaluation: To perform the operation, convert both numbers into their binary representations:

   • 7 in binary: 000001112​

   • 1 in binary: 000000012​

   Now, align the bits and apply the logical AND operation column-by-column:

   000001112​  &  000000012​000000012​​(7)(1)(1)​​

   The result of this operation is 000000012​, which corresponds to the decimal value:

   1

4. Programming Insight: Performing a bitwise AND with 1 (number & 1) evaluates only the least significant bit (LSB) of the integer. If a number is odd, its LSB is always 1, yielding a result of 1. If it is even, its LSB is 0, yielding a result of 0. Since 7 is an odd number, the expression evaluates to 1.

Therefore, the program outputs:

1