Which microoperation shifts a binary number to the left by 1 bit, filling the vacant low-order bit position with 0?

Subject: Computer Architecture and Organization

Topic: Register Transfer & Microoperations

Options:

1. Option A: Arithmetic Right Shift
2. Option B: Logical Left Shift
3. Option C: Circular Right Shift (Rotate)
4. Option D: Arithmetic Right Shift with Sign Extension

Correct Answer:

Option B: Logical Left Shift

Explanation:

Logical Left Shift (shl) shifts all bits one position to the left. The vacant LSB is filled with 0, effectively multiplying unsigned numbers by 2.