Informatics Practices Class 11 Chapter 1 NCERT Solution Computer System

Informatics Practices Class 11 Chapter 1 : Computer System

 Informatics Practices Class 11 Chapter 1 

A computing device, also referred as computer processes the input data as per given instructions
to generate desired output.

Computer processes data to generate information whose further analysis and interpretation yields
knowledge.

Computer system has four physical components viz. i) CPU ii) Primary memory iii) Input device and
iv) Output device. They are referred to as hardware of computer.

Computer system has two types of primary memories viz. i) RAM the volatile memory and ii)
ROM the non-volatile memory.

Software is a set of instructions written to achieve the desired task and are mainly categorised as
system software, programming tools and application software.

Hardware of a computer cannot function on its own.  It needs software to be operational or functional.

Operating system is an interface between the user and the computer and supervises the working of
computer system i.e. it monitors and controls the hardware and software of the computer system.

Informatics Practices Class 11 Chapter 1

Q1. Name the software required to make a computer functional. Write down its two primary services.

Q2. What is the need of RAM? How does it differ from ROM?

Q3. What is the need for secondary memory?

Q4. Draw the block diagram of a computer system. Briefly write about the functionality of each component.

Ans. A computer system primarily comprises a Central Processing Unit (CPU), memory, input/output devices and storage devices.

1. CPU : The CPU has two main components — Arithmetic Logic Unit (ALU) and Control Unit (CU). ALU performs all the arithmetic and logical operations. The control unit controls the sequence in which computer programs and instructions are executed.

2. Input Device : The devices through which data/signals are sent to a computer are termed as input devices. for example : keyboard, mouse, scanner etc.

3. Output Devices : The device that receives data from a computer system for display is called output device. It converts digital information into human understandable form. For example, monitor, projector, headphone, speaker, printer, etc.

4. Storage Devices : A computer system needs memory to store the data and instructions for processing. Those devices which stores data for processing are called storage devices like Hard Disk, SSD etc

Q5. Differentiate between proprietary software and freeware software. Name two software for each type.

Q6. Mention any browsers used for browsing the internet.

Q7. Name the input or output device used to do the following:
a) To output audio
b) To enter textual data
c) To make hard copy of a text file
d) To display the data or information
e) To enter audio-based command
f) To build 3D models
g) To assist a visually-impaired individual in entering data

Q8. Identify the category (system, application, programming tool) of the following software:
a) Compiler
b) Assembler
c) Ubuntu
d) Text editor

Informatics Practices Class 11 Chapter 1

Q9. Convert the following into bytes:
a) 2 MB
b) 3.7 GB
c) 1.2 TB

Q10. What is the security threats involved when we throw away electronic gadgets that are non-functional?

Informatics Practices Class 11 Chapter 1

Q11. Write down the type of memory needed to do the following:
a) To store data permanently
b) To execute the program
c) To store the instructions which can not be overwritten.

Informatics Practices Class 11 Chapter 1

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Informatics Practices Class 11 Chapter 1

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