XI Computer Science

Note: Attempt five Questions in all. Question no.1 is compulsory and it carries 10 marks .Attempt Four more question selecting at least Two questions from each of the Section ‘A’ and ‘B’,each carrying 15 marks.

1.Choose the correct answer from the given options: ( 10 )
(i) A term used to describe the maximum speed at which a given device can transfer data is :

• Buffer
• Routing
• Bandwidth
• Cache

(ii) A software that enables users and applications to interact with the computer hardware is called:

• Operating system
• Application software
• Client software
• Database Management System

(iii) ASCII is the abbreviation of :

• Application software code of information interchange
• American standard code of information interchange
• American system code of information interchange
• American symbolic code of information interchange

(iv) Which part of CPU performs all arithmetic and Logic calculations on data it receive?:

• Control unit
• Main memory unit
• ALU
• Read only memory

(v) Once a program has been translated into the machine Language ,it is called:

• A system program
• Logical program
• An object program
• An application program

(vi) A queue is served on the principle of:

• FILE
• FILO
• LIFO
• FIFO

(vii) ROM is the abbreviation of :

• Random only memory
• Read only memory
• Read on memory
• All of these

(viii) A MODEM is used for communicating:

• Through Telephone
• To Telephone
• To Different Computer
• To a printer

(ix) MSI stands for:

• Medium scale integration
• Mass scale integration
• Many scale integration
• None of these

(x) The rearranging of data in a sequence is called:

• Updating
• Edition
• Batching
• Sorting

SECTION ‘A’

2.Distinguish the following: ( 15 )
(i) Data and information
(ii) Computer and interpreter
(iii) System Software and Application Software.
(iv) Serial parallel ports.
(v) Binary Number system and Decimal Number system.

3.(a) Define the following terms: ( 7 1/2 )
(i) Memory Words
(ii) Memory Address
(iii) ?? MIPS and FLOPS
(iv) Viruses of the computer
(v) Memory access Time and cycle Time
(b) Explain two input and output devices: ( 7 1/2 )

4.(a) What do you mean by a communication system? How does a communication system work? ( 7 1/2 )
(b) Explain what electronic technology characterizes each of the four generations of computers.(7 1/2)

5.(a) Explain the function of arithmetic logic unit in computer.( 7 1/2 )
(b) How many types of buses are there in a computer? Explain the function of each bus. ( 7 1/2 )

SECTION ‘B’

6.(a) What do you mean by data protection principles? ( 5 )
(b) Explain the following terms: ( 10 )
(i) Copyright Law
(ii) Computer Crime

7. (a) Explain the difference between window operating and Disk operating system by taking an arbitrary
example of each. ( 7 1/2 )
(b) Explain how the following operations can be performed us using window: ( 7 1/2 )
(i) Selecting a document
(ii) Renaming a document
(iii) Deleting a file and folder
(iv) Use of recycle bin
(v) Customizing the window

8.Write notes an any Three of the following: ( 15 )
(i) Word Processing
(ii) Browsing
(iii) Advantages and Disadvantages of Internet
(iv) Uses of a Spreadsheet
(v) Use of computer in Education.