Computer 9th Chap 1 : Topic 1.11 - Maryam Publications

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Computer Chapter 1 : Topic 1.12

Key Components of a Computer System

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Which statement best explains the fundamental difference between natural systems and artificial systems in computing context?

A) Natural systems require electricity while artificial systems do not require energy

B) Natural systems are always mechanical while artificial systems are always biological

C) Natural systems exist without human design while artificial systems are created by humans for specific purposes

D) Natural systems are programmable while artificial systems are not programmable

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In a computer system, why are artificial systems considered more predictable compared to natural systems in computational modeling?

A) Because artificial systems follow designed instructions and defined logical rules

B) Because artificial systems cannot process data consistently

C) Because artificial systems depend on environmental changes like weather

D) Because artificial systems always behave randomly under input conditions

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Which option best describes the role of a system in computing when comparing natural and artificial systems together?

A) A system consists of interconnected components working together for a common goal

B) A system only refers to software applications running on computers

C) A system is always biological and never includes machines

D) A system is a collection of unrelated elements without interaction

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Which of the following correctly describes the central processing unit (CPU) in a computer system architecture?

A) It is a secondary storage device used for backup purposes

B) It is responsible only for storing permanent data on disks

C) It is used only for displaying output on the monitor

D) It performs processing and controls all operations of the computer system

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What is the primary function of the Arithmetic Logic Unit (ALU) inside the CPU during instruction execution?

A) It controls input and output devices of the system

B) It performs arithmetic calculations and logical comparisons on data

C) It stores all user programs temporarily during execution

D) It permanently saves processed results into secondary memory

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Which task is most accurately associated with the Control Unit (CU) in CPU architecture during program execution?

A) Performing mathematical calculations on binary data

B) Storing long-term data for future use in memory

C) Displaying processed results on output devices directly

D) Managing and directing the execution of instructions in proper sequence

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Why are registers considered the fastest type of memory within the CPU architecture compared to other memory types?

A) Because they operate independently of the CPU clock cycle

B) Because they are used for storing multimedia files only

C) Because they are located inside the CPU and directly accessible for processing

D) Because they store data permanently for long-term use

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Which statement best describes the relationship between ALU, CU, and registers during instruction processing?

A) CU stores long-term memory while ALU handles system booting

B) CU controls operations, ALU performs calculations, and registers hold temporary data

C) Registers control CPU while ALU manages input devices directly

D) ALU stores instructions while CU performs calculations using registers

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What is the most accurate distinction between primary memory and secondary memory in a computer system?

A) Primary memory is permanent while secondary memory is temporary

B) Primary memory is faster and temporary while secondary memory is slower and permanent

C) Secondary memory is inside CPU while primary memory is outside CPU

D) Both primary and secondary memory have identical speed and storage roles

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Why is cache memory placed closer to the CPU compared to primary memory in system architecture?

A) To store large multimedia files permanently

B) To slow down CPU processing speed intentionally

C) To reduce data access time for frequently used instructions

D) To replace the need for secondary storage devices

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Which situation best demonstrates the use of cache memory during computer processing tasks?

A) Saving a file permanently on a hard disk drive

B) Displaying output on a monitor screen

C) Installing new software applications into the system

D) Repeatedly accessing recently used instructions faster than RAM access

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How does secondary memory differ from primary memory in terms of data retention and usage in computing systems?

A) Secondary memory stores data permanently and primary memory is temporary

B) Both memories are equally volatile and temporary

C) Secondary memory is volatile and loses data when power is off

D) Primary memory stores data permanently even after shutdown

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Which of the following best describes the operating system's role in managing computer hardware and software resources?

A) It permanently stores all system data in memory

B) It manages hardware resources and provides an interface for users and applications

C) It replaces the need for CPU in system processing

D) It directly designs application software for users

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Why is an operating system considered essential for running application software on a computer system?

A) Because it replaces input and output devices

B) Because it acts as a platform for executing and managing applications

C) Because it permanently stores application programs

D) Because it provides direct internet access only

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Which example best represents application software in a computer system environment?

A) A word processor used for document creation

B) BIOS controlling system startup processes

C) Windows operating system managing hardware

D) CPU executing machine-level instructions

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What is the most accurate distinction between system software and application software in computing environments?

A) Application software runs without system software support

B) System software manages hardware while application software helps users perform tasks

C) System software is user-focused while application software controls hardware

D) Both perform identical functions in different environments

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Which scenario best illustrates how the Control Unit coordinates CPU activities during program execution?

A) It directs ALU and memory operations based on instruction decoding

B) It displays output results directly to the user screen

C) It performs calculations on stored numerical data

D) It stores all program files permanently in memory

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Why is RAM classified as a volatile memory in a computer system architecture?

A) Because it stores data permanently without power

B) Because it loses stored information when the system is turned off

C) Because it only stores system software permanently

D) Because it is slower than secondary storage devices

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Which combination of components is directly involved in executing a single machine instruction inside the CPU?

A) ALU, CU, and registers working together

B) Printer, scanner, and speaker

C) Hard disk, monitor, keyboard

D) Cache, BIOS, and motherboard chipset only

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What is the main reason registers are used in CPU operations instead of directly accessing main memory every time?

A) Registers provide extremely fast access for temporary data storage

B) Registers replace the need for cache memory entirely

C) Registers store large files permanently

D) Registers are cheaper to manufacture than RAM

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How does cache memory improve overall system performance during repetitive processing tasks?

A) By eliminating the need for secondary storage devices

B) By replacing the CPU's arithmetic operations

C) By storing all long-term files permanently

D) By reducing time needed to fetch frequently used data

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Which statement best explains why secondary memory is necessary despite the presence of primary memory in computer systems?

A) Because primary memory stores data permanently

B) Because primary memory cannot store any data at all

C) Because secondary memory is faster than CPU registers

D) Because secondary memory provides long-term storage even when power is off

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Which function best represents how application software interacts with operating systems in real-world usage?

A) It requests services from OS to perform user-oriented tasks

B) It directly controls hardware without OS involvement

C) It bypasses CPU processing for faster execution

D) It permanently replaces system software functionality

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What is the most accurate explanation of how CPU architecture components work together during instruction execution cycle?

A) CU replaces RAM during processing cycles

B) ALU handles input, CU stores memory, registers control output

C) Registers perform calculations while ALU stores programs

D) CU fetches instructions, ALU executes operations, registers store intermediate data

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Which example best demonstrates a natural system rather than an artificial system in computing comparison context?

A) A computer CPU processing instructions

B) A word processing application

C) A smartphone operating system

D) A weather ecosystem developing naturally without human design

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Why is the operating system considered an intermediary between hardware and application software in computing architecture?

A) Because it manages communication and resource allocation between them

B) Because it physically replaces hardware components

C) Because it performs arithmetic calculations instead of CPU

D) Because it stores application files permanently

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Which statement best explains why ALU and CU must work closely together inside the CPU architecture?

A) Because ALU replaces the need for registers completely

B) Because both store permanent memory data

C) Because CU directs operations while ALU executes the required computations

D) Because CU performs calculations while ALU controls input devices

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Which memory hierarchy correctly reflects fastest to slowest access speed in a computer system architecture?

A) Cache → registers → secondary memory → primary memory

B) RAM → cache → secondary memory → registers

C) Secondary memory → cache → registers → RAM

D) Registers → cache → primary memory → secondary memory

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