Question 1

Question 1Assertion (A): Computer is an electronic device that accepts input, processes it and displays the output.Reasoning (R): Computer is a combination of hardware and software. Every task given to it follows IPO cycle.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationA computer is an electronic device that accepts a set of instructions in the form of a program, executes it and displays the output to the user. Computer is a combination of hardware and software. Every task given to a computer follows an Input → Process → Output Cycle (IPO cycle).

Question 2

Question 2Assertion (A): Primary memory is the main memory inside computer that holds data, programs and instructions that are currently in use.Reasoning (R): Secondary memory is used for permanent storage of data for future use.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true but R is not the correct explanation of A.ExplanationPrimary memory, also known as main memory, is the memory inside a computer that holds data, programs, and instructions that are currently in use. Secondary memory, also known as auxiliary memory, is used for permanent storage of data for future use.

Question 3

Question 3Assertion (A): Cache memory is placed between CPU and main memory (RAM).Reasoning (R): Cache memory stores frequently used data and instructions so that they are immediately available to the CPU.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationCache memory is placed between the CPU and the main memory (RAM) to store frequently used data and instructions. By doing so, it makes this data available to the CPU very quickly, sending it directly to the CPU instead of the main memory. This significantly reduces access time, thereby improving the overall performance of the computer.

Question 4

Question 5Assertion (A): Operating system is the most important utility software.Reasoning (R): Utility Software are essential for maintenance and configuration of the computer system.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is false but R is true.ExplanationAn operating system is not considered utility software, it is classified as system software. Utility software consists of programs that assist the computer by performing certain tasks that help in the proper maintenance and configuration of the computer.

Question 5

Question 6Assertion (A): Operating system acts as an interface between a user and computer hardware.Reasoning (R): Operating system manages all the resources of a computer.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationAn operating system (OS) is a program that acts as an interface between the user and hardware of the computer. The OS helps to manage resources of the computer and optimize its performance.

Question 6

Question 17Which smaller unit of CPU directs and coordinates all activities within it and determines the sequence in which instructions are executed, sending instruction sequence to other smaller units?CUALUProcessorAll of these

Accepted Answer

CUReason — The Control Unit (CU) directs and coordinates all activities within the CPU and determines the sequence in which instructions are executed, sending instruction sequences to other smaller units.

Question 7

Question 19Convert the following into Kilobytes:2.7 GB = ............... Kilobytes2831155.22764.82831155.022764.08

Accepted Answer

2831155.2Reason — To convert gigabytes (GB) to kilobytes (KB), we use the following conversion factors:1 GB = 1024 MB (megabytes)1 MB = 1024 KB (kilobytes)First, convert gigabytes to megabytes: 2.7 GB * 1024 = 2764.8 MBNext, convert megabytes to kilobytes: 2,764.8 MB * 1024 = 2831155.2 KBTherefore, 2.7 GB equals 2831155.2 kilobytes.

Question 8

Question 4Define hardware and software.

Accepted Answer

Hardware refers to the physical or tangible components of a computer system. Examples include the CPU, monitor, keyboard, mouse, hard drive, and printer.Software is the code or a set of instructions necessary to operate/run the computer hardware. It is intangible component of a computer. Examples include operating systems, applications, and programming languages.

Question 9

Question 7Explain the types of operating systems with examples.

Accepted Answer

Types of Operating systems are as follows:Time-Sharing Operating System — Multiple users share system resources simultaneously, and the OS ensures that each user gets a slice of computing time. Examples, Unix.Multi-User Operating System — Allows multiple users to access the computer resources simultaneously. Examples, Linux.Single-User Operating System — Designed for one user to access the computer at a time. Examples, Windows 10, macOS.

Question 10

Question 8"Hardware is of no use without software and software cannot be used without hardware." Explain.

Accepted Answer

Hardware refers to the physical components of a computer system, such as the CPU, memory, and storage devices, which provide the infrastructure for computing operations. However, without software — the programs and applications that instruct hardware how to function — these components cannot perform meaningful tasks. Conversely, software requires hardware to execute its instructions. Software encompasses operating systems, applications, and utilities that enable users to interact with computers and perform specific tasks. These programs rely on hardware to provide processing power, storage, and input/output capabilities necessary for running software effectively. Together, hardware and software make the computer system function.

Question 11

Question 9How can software be classified? Name at least one software in each of the categories.

Accepted Answer

Depending on the mode of interaction with hardware and functions to be performed, software can be broadly classified into three categories:System Software — System software refers to the programs that control internal computer operations and make best use of the hardware. For example, operating system, language translators etc.Application Software — Application Software is the set of programs necessary to carry out operations for a specified application. For example, word processing software, spreadsheet software etc.Utility Software — Utility software helps to manage, maintain and control computer resources. For example, text editor, antivirus software etc.

Question 12

Question 10What is an operating system? Write names of any two popular operating systems.

Accepted Answer

An operating system is an integrated set of programs that manages various resources and the overall operations of a computer system. It is designed to support the various activities of the computer system in a systematic way.For example, Microsoft Windows, Linux, etc.

Question 13

Question 11Specify the measuring units of memory.

Accepted Answer

The measuring units of memory are bit (elementary unit), byte, Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte, Exabyte, Zettabyte, Yottabyte, Brontobyte, Geopbyte.

Source: This question is from Computer System Organization, Computer Science &mdash; Class 11, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System Organization: Question, Specify, Measuring, Units, Memory, Computer System Organization. These are fundamental topics in Computer Science that students are expected to master as part of the CBSE Class 11 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer System OrganizationQ1: Question 1 Assertion (A): Computer is an electronic device that accepts input, processes it and...
Q10: Question 10 What is an operating system? Write names of any two popular operating systems.
Q12: Question 12 Identify the category (system, application, programming tool) of the following...
Q13: Question 13 What do you mean by memory devices? Explain RAM and ROM.
Q14: Question 14 What are output devices? Give some examples.
Practice more questions from Computer System Organization &mdash; Computer Science, Class 11 CBSE

Question 14

Question 12Identify the category (system, application, programming tool) of the following software:(a) Compiler(b) Assembler(c) Ubuntu(d) Text Editor

Accepted Answer

(a) Compiler — Programming Tool(b) Assembler — Programming Tool(c) Ubuntu — System Software(d) Text Editor — Application Software

Question 15

Question 13What do you mean by memory devices? Explain RAM and ROM.

Accepted Answer

Memory devices are hardware components that store data or program instructions for a computer.RAM (Random Access Memory) — It is a read/write memory as it is possible to both read from and write to a location within RAM. It is used for primary storage in computers to hold active information of data and instructions. The RAM is a volatile memory as it does not store data and instructions permanently and loses its contents when the power is switched off or interrupted. RAM provides faster access than secondary memory with less memory access time. The RAM chip in a computer can be categorized into two types:Static RAM (SRAM)Dynamic RAM (DRAM)ROM (Read-Only Memory) — It is a read-only memory, i.e., the data and instructions are placed in the ROM at the time of its manufacturing and cant be changed thereafter. It is a permanent and non-volatile memory as it does not lose its contents when the power is switched off or interrupted. It is slower than RAM and is used to hold certain essential instructions to check basic hardware components such as booting, procedures to load operating system and frequently needed functions. The different types of ROM available are:PROM (Programmable Read-Only Memory)EPROM (Erasable Programmable Read-Only Memory)EEPROM (Electrically Erasable Programmable Read-Only Memory)

Question 16

Question 14What are output devices? Give some examples.

Accepted Answer

Output devices are the devices that produce the output generated by the CPU in human understandable form, such as audio, video, text or hard copy, viz. printed documents.For example: Visual Display Unit (VDU)/Monitor, LCD Screen, LED Screen, OLED, Printer, Speakers, Plotters etc.

Question 17

Question 15List different types of impact printers.

Accepted Answer

The different types of impact printers are as follows:Dot Matrix PrintersDaisy Wheel PrintersLine PrintersBand PrintersDrum Printers

Source: This question is from Computer System Organization, Computer Science &mdash; Class 11, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System Organization: Question, Impact, Printers, Computer System Organization, Computer Science. These are fundamental topics in Computer Science that students are expected to master as part of the CBSE Class 11 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer System OrganizationQ1: Question 1 Assertion (A): Computer is an electronic device that accepts input, processes it and...
Q10: Question 10 What is an operating system? Write names of any two popular operating systems.
Q12: Question 12 Identify the category (system, application, programming tool) of the following...
Q13: Question 13 What do you mean by memory devices? Explain RAM and ROM.
Q14: Question 14 What are output devices? Give some examples.
Practice more questions from Computer System Organization &mdash; Computer Science, Class 11 CBSE

Question 18

Question 16Briefly explain the working of a laser printer.

Accepted Answer

Laser printers use laser technology to produce printed documents. They use a dry form of ink called toner which is made up of tiny particles. They are very fast and are used for high-quality prints.

Question 19

Question 18Given below are some features of computer memories—RAM and ROM. List the below-given features under RAM or ROM:(a) Non-volatile Memory(b) Content can't be changed(c) Volatile Memory(d) Can be written to and read from

Accepted Answer

RAMROMVolatile MemoryNon-volatile MemoryCan be written to and read fromContent can't be changed

Question 20

Question 20Explain in brief the working of a touch screen.

Accepted Answer

Touch screen is a type of display screen which allows interaction with computer through a touch-sensitive transparent panel covering the entire screen without any intermediate device. The touch screen uses a technology that enables the users to touch the screen with fingers to select objects.

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