Computer 9th Chap 1 : Topic 1.14 - Maryam Publications

Computer Chapter 1 : Topic 1.14

Memory and Storage Hierarchy

1 / 7

How do input instructions travel through a computer system before being processed by the CPU in a coordinated system architecture?

A) Input device → secondary memory → monitor → CPU directly

B) Input device → main memory → registers → CU control → ALU execution

C) Input device → CPU registers → ALU → permanent storage without memory use

D) Input device → output device → CPU → cache only

2 / 7

Which sequence correctly describes how an instruction is transmitted from memory to CPU components for processing in a computer system?

A) Memory → Registers → Control Unit → ALU execution

B) Input device → Cache → Output device → CPU

C) Hard disk → Monitor → CPU → Printer

D) ALU → RAM → Registers → Output

3 / 7

During data processing, what role do registers play when interacting with ALU and Control Unit inside the CPU architecture?

A) Registers replace the function of cache and RAM entirely

B) Registers hold temporary data and instructions for quick access by ALU and CU

C) Registers permanently store large programs for future use

D) Registers directly control system hardware like input devices

4 / 7

How does the Control Unit manage the flow of instructions and data between the CPU, memory, and input/output devices during execution cycles?

A) It permanently stores all processed results in secondary memory

B) It coordinates and controls the transfer of instructions and signals across system components

C) It replaces the need for ALU by executing logical operations

D) It directly performs calculations on stored data in memory

5 / 7

What is the primary function of system buses in enabling communication between CPU, memory, and other computer system components during data processing?

A) They store instructions temporarily inside the CPU registers

B) They perform logical and arithmetic operations on data

C) They replace RAM by storing all program data

D) They transfer data, instructions, and control signals between components

6 / 7

Which interaction correctly explains how data moves when a program instruction is executed inside a CPU-based computer system architecture?

A) Memory sends instruction to CU, which decodes it and directs ALU to process data in registers

B) Cache stores output permanently before execution begins

C) Registers control memory while CU performs storage operations

D) Output device sends data directly to ALU for calculation

7 / 7

Why is communication between cache memory and CPU registers important in improving data processing efficiency in modern computer systems?

A) Because registers store data permanently instead of RAM

B) Because frequently used data is quickly transferred into registers for faster CPU execution

C) Because cache replaces the function of secondary storage permanently

D) Because cache directly replaces the CPU control unit

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