COMPUTER SCIENCE
(11th Class-12012)
TIME: 20 MINUTES
OBJETIVE
MARKS 15
NOTE: You have four choices for each objective type question as A,B,C and D . The choice which you think is correct , fill that cirle in front of that question number. Use marker or pen to fill the circles, Cutting, or filling two or more circles will result in zero mark in the question. Attempt as many questions as given in of objective type question paper and leave others blank. Write the letter A , B C or D in the column (Write correct  option) against each question. If there is a contradiction in the bubble and hand written answer. Bubble option will be considered correct.

QUESTION NO. 1

• Smallest nit of memory is
  

(A) Byte
(B) bit
(C) Character
(D) Word

• An input device , which is used for laying computer games
  

(A) Light pen
(B) Mouse
(C) By Stick
(D) Scanner

• What layer of OSI model does data compression
  

(A) Network
(B) Presentation
(C) Data Link
(D) Physical

• Which topology uses Hub
  

(A) Bus
(B) Ring
(C) Mesh
(D) Star

• Which of the following coding scheme uses 4 — bit code
  

(A) ASCII
(B) BCD        
(C) EBCDIC
(D) Unicode

• Select unguided media
  

(A) Twisted pair
(B) Co-axial   
(C) Satellite
(D) Fiber optic

• The fly-by-wire system is used in
  

(A) Medical Field
(B) Airline
(C) Education
(D) Banking

• Many banks provide the facility of
  

(A) CAD
(B) CAM
(C) ATM
(D) CBT

• Which one is faster
  

(A) RAM
(B) Cache
(C) Register
(D) Hard disk

• The order of stack is
  

(A) FIFO
(B) GIGO      
(C) FIGO       
(D) LIFO

• A virus that replicates itself is called
  

(A) Bug          
(B) Worm
(C) Vaccine
(D) Bomb

• The maximum number of primary partitions that can be created on a disk

(A) 2   
(B) 3   
(C) 4   
(D) 5

• Which function key is used for checking spelling and grammar is word
  

(A) Fl 
(B) F7
(C) F9
(D) F12

• Which of the following is corrected address
  

(A) AA
(B) 25
(C) 3C
(D) D7

• Select protocol to access web pages on world wide ‘veb
  

(A) TCP/IP
(B) HTTP
(C) HTNIL
(D) FTP

(11th CLASS - 2012)
COMPUTER SCIENCE 
TIME 2.10 HOURS
SUBJECTIVE  
MARKS: 60
SECT1ON-I

QUESTION NO. 2 Write short answers to any Six (6) of the following questions 12

• What do you know about pen based system ?
  
• Enlist four different pointing devices
  
• What is system software ?
  
• What is peer to peer Network Model ?
  
• Explain TCP/IP
  
• What do you know about workgroup computing ?
  
• What is parallel data transmission
  
• Describe synchronous data transmission
  
• Define Bandwidth
  

QUESTION NO.3 Write short answers to any Six of the following questions.  12

• Write some benefits of computer aided learning
  
• How computer can be used in airline system ?
• Describe computer architecture?
  
• Why is RAM called Random Access Memory ?
  
• What is motherboard ?
  
• List some important responsibilities of I/ unit
  
• Define operation code and operand
  
• How virus is activated ?
  
• What is Redid?
  

QUESTION NO. 4 Write short answers to any Six (6) of the following questions 12

• What is Recycle Bin?
• What is meant by print Queue ?
• What is document window ?
• For what purpose headers and footers are used ?
• Who, is difference between function and formula'?
• What are main uses of MS-Excel
• Define web Browser
• How e-mail system works r?
• Define Internet

SECTION-II

5. What is an impact printer ? Explain any two types of impact printer. (8)

6. What is network protocol ? Discuss different LAN Protocols. (8)

7. How data is represented inside the computer , describe different coding schemes to represent data. (8)

8. What  is meant by CPU? Describe briefly its units. (8)

9. Define Virus ? Discuss different types of Viruses. (8)