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 → main memory → registers → CU control → ALU execution

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

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

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

2 / 7

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

A) ALU → RAM → Registers → Output

B) Hard disk → Monitor → CPU → Printer

C) Input device → Cache → Output device → CPU

D) Memory → Registers → Control Unit → ALU execution

3 / 7

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

A) Registers permanently store large programs for future use

B) Registers directly control system hardware like input devices

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

D) Registers replace the function of cache and RAM entirely

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 directly performs calculations on stored data in memory

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

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

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 perform logical and arithmetic operations on data

B) They replace RAM by storing all program data

C) They store instructions temporarily inside the CPU registers

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) Registers control memory while CU performs storage operations

B) Output device sends data directly to ALU for calculation

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

D) Cache stores output permanently before execution begins

7 / 7

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

A) Because cache replaces the function of secondary storage permanently

B) Because registers store data permanently instead of RAM

C) Because cache directly replaces the CPU control unit

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

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