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Question-1

Define a computer.

Solution:
A computer is an electronic device capable of performing all tasks in the desired way by executing a detailed set of instruction called programs.

Question-2

Write the difference between data and information.

Solution:

 

Data

Information

Collection of raw facts and figures

Collection of useful knowledge derived from data

Example: ‘Tom’, 1980, ‘x’, 162

Example: Tom scored ‘A’ grade in his term examination.

 

Question-3

Define the Following terms: 

a. byte

b. nibble
 
c. bit
 
d. gigabyte.

Solution:
Byte: Collection of 8 bits is called 1 byte.

Nibble: Collection of 4 bits is called 1 nibble.

Bit: A bit means binary digit either 0 or 1.

Gigabyte: 1 gigabyte = 210 MB, i.e., 1024 * 1024 * 1024 bytes.

Question-4

Explain Input Unit.

Solution:
It comprises of various input devices, which help to input program, data, information and various operating commands into the computer. The main function of input unit is to read the information contained in the program and to transfer that information to the CPU. The information received is converted into binary digits and stored in the computer memory. Input devices are used to give input. Some of the input devices are Keyboard, Mouse etc.

Question-5

Write the difference between ALU and CPU

Solution:

 

ALU

CPU

Expansion – Arithmetic Logic Unit

Expansion – Central Processing Unit

Performs all types of calculations such as addition, subtraction, multiplication and division

Controls the overall activities of the computer

 

Question-6

What is an operating System?

Solution:
It is an interface between the user and the computer hardware. It acts as a mediatory. It loads the programs, perfors computing functions, manages the information storing and retrieving from the disk, and so on.

Question-7

How is a compiler different from an interpreter?

Solution:
A compiler converts the source code into object code in one go, and reports all the errors along with their line numbers. An interpreter converts the source code into object code line by line and executes it then and there. It does not shift to the next line if the line is erroneous.

Question-8

List some of the high level languages.

Solution:
Pascal, COBOL, FORTRAN

Question-9

What are the advantages of computers?

Solution:
Processing and labour cost can be reduced to a large extent. Better design of components and automation in every component can be obtained. Higher accuracy can be obtained using computers. Any problem can be easily solved using the computers. As computers can process at a high speed, a lot of time can be saved.

Question-10

What is the function of ALU?

Solution:
Arithmetic Logic Unit performs arithmetic calculations like addition, subtraction, division and multiplication.

Question-11

What is software?

Solution:
Software is a set of program that helps to perform an application or a task.

Question-12

Explain the Digital computers.

Solution:
Digital Computers
Digital computers store data in digits and proceeds in a discrete format. It is like an adding machine that counts rather than measures. It deals with discrete signals and works with high precision and at tremendous speed. It has a very large memory that can store huge quantities of data.

Question-13

What is parallel processing?

Solution:
When many processors are grouped to function as one large group processor, it is called parallel processing.

Question-14

Write notes on fourth generation computer?

Solution:
It uses microprocessor chip instead of integrated chips. It has good speed, accuracy and is smaller in size. It is portable and has vast application in the field of data communication. Different types of secondary memory with high storage capacity and fast access are developed. It uses keyboard and Mouse as its input devices, and CDRom as its storage device.

Question-15

Expand EDSAC and UNIVAC.

Solution:
EDSAC: Electronic Delay Storage Automatic Computer.

UNIVAC: Universal Automatic Computers.

Question-16

List the types of computers based on performance.

Solution:
The computers based on performance are minicomputers, microcomputers, supercomputers and mainframe computers.

Question-17

Expand ENIAC.

Solution:
Electronic Numerical Integrator And Calculator.

Question-18

What is a peripheral?

Solution:
They are the devices that surround the system unit.

Question-19

List any 2 application of computer.

Solution:
Air ticket booking, online shopping.

Question-20

Name the first device for computing.

Solution:
Abacus

Question-21

What is the relation between microprocessor and microcomputer?

Solution:
Microcomputer is a computer that contains a microprocessor.




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