XI Computer Science 2005
XI Computer Science
Note: Attempt Five questions in all including the compulsory question No.1 which carries 10 marks.Select any Two questions from each of the section ‘A’ and section ‘B’.
1. Choose the correct answer for each from the given option ( 10 )
(i) A group of 4 bits is called:
- Byte
- word
- Nibble
- All of the above.
(ii) A computer is a :
- Part of a computer
- Program to convert a high level language into machine language
- Source program
- Object program
(iii) Non-Volatile memory is :
- ROM
- Cache Memory
- RAM
- All of them
(iv) Floppy disk and hardware disk are the types of:
- Magnetic tape
- Magnetic disk
- Optical disk
- None of the above
(v) 1024 gigabytes data are equivalent to:
- One megabyte
- 8 bits
- One Tetabyte
- 1024 kilobytes
(vi) URL stand for:
- Urban Resource Locator
- Unit Resource Locator
- Universal Resource Locator
- None of them
(vii) The size of the instruction register is always equal to the size of:
- Program counter
- Memory Address Register
- Memory buffer register
- None of above
(viii) A stack is served on the principle of:
- LILO
- LIFO
- FIFO
- None of them
(ix) The process of converting an analog signal to a digital signal is called:
- Half duplex
- Full duplex
- Modulation
- Demodulation
(x) The registers that collect the results of computation are:
- Main storage
- Storage register
- Stack
- Accumulator
2.(a) What is a Computer System? Explain with the help of a diagram. ( 5 )
(b) What is a Cache Memory ? How is it different from a primary memory? ( 5 )
(c) Distinguish between Primary Storage and Secondary Storage.
3.(a) What are Input and Out Devices? Give two examples of each. ( 5 )
(b) What is an Operating System? Why is It necessary for a computer system? ( 5 )
(c) What is an e-mail ? How is it useful for us? ( 5 )
4.(a) Define a Bus.Describe the function of the address bus ,control bus and data bus. ( 5 )
(b) What do you know about the copyright laws of software ?
(c) what is a computer Virus ? How can we protect our computer from it? ( 5 )
5.(a) Define a register ,What is the function of a register ? Name the important register of CPU. (5)
(b) Explain with the help of a diagram the process of fetching and executing an instruction from the memory of a computer. ( 5 )
(c) What is LAN? Describe briefly the three common LAN topologies. ( 5 )
SECTION ‘B’
6.(a) Define the following terms related to screen display : ( 5 )
(i) CRT
(ii) Pixel
(iii) Resolution
(iv) Monochrome
(v) SVGA
(b) Which of the following address is/are the correct e-mail address( es ) ( 5 )
(i) www.findlaw.com
(ii) jones@sea
(iii) childs@wqbh.boston
(iv) shared@group.org
(v) xyz@abc.edu.ca
(c) What do the following terms stand for: ( 5 )
(i) ASCII
(ii) ISDN
(iii) GUI
(iv) TCP/IP
(v) WAP
7.(a) How is a computer useful for us? Define briefly its usage in the field of education. ( 10 )
(b) Match each item of Column ‘A’ with its correct description in Column ‘B’ .( 5 )
(i) Cache (a) Spread sheet
(ii) Interpreter (b) Internet
(iii) Impact (c) Memory
(iv) Excel (d) Language translator
(v) E-mail (e) Printer
8.Differentiate between any Three of the following: ( 15 )
(i) Compiler and Interpreter
(ii) Half Duplex and Full Duplex
(iii) Impact Printer and Non-Impact Printer
(iv) High Level Languages and Low Level Languages
(v) System Software and Application Software.
Comments