Difference between Multitasking, Multiprocessing, Multiprogramming

Multitasking	Multiprocessing	Multiprogramming
In this system several tasks are carried out at one time.	In this system several processor are carried out at on time to do several task.	In this system several task are carried.
Powerful RAM is required.	Powerful processing required.	Powerful RAM and space is required.
Available in different device.	Not available in all devices.	Easily available in all devices
It carries out program slower than Multiprocessing.	It carries out program fast as two processor is used.	It carries out programs one after another.

Probable Q/As for Computer Science

Long Questions

‡  . Explain the various types of computers on the basis of size.

The digital computers that are available nowadays vary in their sizes and types. The computers are broadly classified into four categories based on their size and type

Microcomputers

Microcomputers are small, low‐cost and single‐user digital computer. They consist of CPU, input unit, output unit, storage unit and the software. Although microcomputers are stand‐alone machines, they can be connected together to create a network of computers that can serve more than one user. IBM PC based on Pentium microprocessor and Apple Macintosh are some examples of microcomputers. Microcomputers include desktop computers, notebook computers or laptop, tablet computer, handheld computer, smart phones and notebook.

Some Important Differences of Computer Science of Grade XI

Analog Computer & Digital Computer

Analog Computer	Digital Computer
The computer which is based on continuous data is known as analog computer.	The computer which is based on discrete data is known as digital computer.
It measures only physical or natural quantities such as water flow, current and voltage.	It is based on digits that are 0 and 1 or OFF and ON state.
It is used for specific purposes.	It is used for general purposes.
These computers are suited for physics and engineering.	These computers are suited for graphical works, documentation, business and industrial processes.
Has no storage or memory capacity.	Has high storage or memory capacity.
Cost is low compared to digital computers.	Cost is high compared to analog computers.
E.g.: Thermometer, Speedometer etc.	E.g.: IBM PC, MAC Book etc.

Primary & Secondary Memory

Primary Memory	Secondary Memory
Low storage capacity.	High storage capacity.
Used for short term basis.	Used for long term basis.
Also called Main memory.	Also called Auxiliary memory.
Faster than Secondary memory.	Slower than Primary memory.
It is temporary / permanent memory.	It is permanent memory.
Expensive than Secondary memory.	Cheaper than Primary memory.
E.g.: RAM, ROM etc.	E.g.: Magnetic drums, tapes, disks etc.

Computer Virus

Introduction

Computer virus is a kind of program that destroys the functioning power of computer smoothly. Viruses have many purposes-some are designed to play annoying tricks, whereas others have destructive intent.

Symptoms of Virus

Chapter Internet and Email Notes (Computer Science)

Internet and Email

Webpage

A web page is a Document commonly written in HTML that is accessible through the    internet or other network using a browser. A web page    is accessed by a URL address and many contain text, Graphic, hyperlink etc are linked to other page.

OR,

A web page is a web document that is suitable for the world-wide-web.   

Website

A website is a set of related webpages typically served from a single web domain

Question Paper of Computer Science | Grade XI 2070

Candidates are required to give their answer in their own words as far as practicable. The Figures in the margin indicates full marks.

Time: 3 hrs | Full Marks: 75 | Pass Marks: 27

Group ‘A’ – Long Answer Questions

Attempt any three questions. [3 X 10 = 30]

1. Explain different types of programming languages with their merits and demerits. [10]
2. What is logic gate? Describe any four logic gates with truth table and gate symbol. [2 + 8]
3. What is computer architecture and computer organization? Describe the different units of computer system. [2 + 8]

Question Paper of Computer Science | Grade XI 2071

Candidates are required to give their answer in their own words as far as practicable. The figure in the margin indicate full marks.

 

Time: 3 hrs | Full Marks: 75 | pass Marks: 27 

Group ‘A’ – Long Answer questions

Attempt any three questions [3x10=30]

1. What is an operating system? Describe the types of operating system. [2+8=10]
2. What is logic gate? Describe any four types of logic gate with truth table. [2+8=10]