ACtE08 · Chapter 8Mock Test 03🏛️ Past Licensure QuestionID: a9322e4a
What is the primary purpose of the computer system address bus?
What is the primary purpose of the computer system address bus?
Multiple Choice Options
- A
To carry data to and from the CPU and memory
- B
To select whether a read or write cycle occurs
- C✓ Correct Option
To specify a memory location or I/O device port address
- D
To provide power to memory chips
Detailed Technical Solution & Explanation
The address bus is a unidirectional set of lines used by the CPU to transmit the physical memory address of the memory location or I/O port being accessed for reading or writing.
Option Analysis:
•
Option A: Function of the bidirectional Data Bus.
•
Option B: Function of the Control Bus (e.g., RD/WR control lines).
•
Option C (to select a location within the memory chip): Correct. Carries the address selecting specific memory cells or I/O registers.
•
Option D: Provided by the power supply lines (, GND).
Reference: Mock Test 03NEC Licensure Syllabus