Computer Science
(PART- 1)
Time :20 Minutes
Objective Code : 6833                       
Marks 15
2016 Sahiwal
Note: You have four each objective type Question  A., B. C and D. The choice which you. think is correct circle in front of that question number with marker or pen. Cutting or filling two or more circles will result is zero mark in that question

• An additional copy of data stored on storage media is called
  

(A) backup of data
(B) set of data
(C) moving data    
(D) transferring

• If memory location is to be read CPU places address in
  

(A) MAR          
(B) MBR  
(C) PC
(D) Accumulator

• The step that performs the Actions given in. the instruction is called
  

(A) Fetch        
(B) Calculate         
(C) Decode
(D) Execute

• Most applications of robotics are in which area?
  

(A) Cooking   
(B) Manufacturing
(C) Teaching          
(D) Farming

• An arrangement in which data can be received and sent simultaneously is called 
  

(A) Simplex    
(B) Full duplex      
(C) Half duplex     
(D) Semi duplex

• Physical path that cameos the source and receiver is known as
  

(A) Communication channel  
(B) Decoder          
(C) Encoder          
(D) Self testing

• The layer  OSI model that establishes of user, maintains it and terminates it
  

(A) Presentation    
(B) Application      
(C) Transport         
(D) Session

• Transferring information from computer to internet called

(A) Downloading
(B) Uploading       
(C) Pasting
(D) Transferring

• The most familiar input device for computer is
  

(A) Scanner           
(B) Keyboard  
(C) Graphic tablet
(D) Mouse

• The output of printer is called
  

(A) Hard copy 
(B) Graphic           
(C) Multimedia     
(D) Soft copy

• Web page  are connected one another using
  

(A) Hyperlinks      
(B) HTTP       
(C) Interlink
(D) Multimedia

• Which of the following is a correct column address?
  

(A) AA     
(B) 25       
(C) 3B      
(D) C5

• White space  around  primed page is called
  

(A) Margin arca     
(B) White area       
(C) Cover area       
(D) Blank area

• Add new hardware  option exist in

(A) Main menu      
(B) Status bar 
(C) Taskbar            
(D) Control oanel

• Another name for antivirus is
  

(A) Vaccine                 
(B) Worm        
(C) Cleaner software   
(D) Remover

Computer Science
Part I
Time :2:10 hours
SUBJECTIVE
Note: Section I is compulsory.

• Define e-commerce
• List two types of video card
• What is magnetic strip card
• What do you mean by router
• Write two disadvantages of pear-to-pear model.
• What is dedicated server?
• Define Unicode
• Give two advantages of fiber optics
• Describe modulation

3. Write a short answer to any six parts: (6x2=12)

• How computers can be used in departmental store?
• What is computer simulation?
• Give one difference between primary memory and cache memory?
• What is DMA (Direct Memory Access)?
• Give two parts of instruction format
• What is stack?
• List two segment registers?
• What is software piracy?
• Why is data backup important?

4. Write a short answer to any six parts:  (6x2=12)

• Describe control panel
• Write two uses of start button
• What is text editor
• Write shortcut keys to save and print a document
• Define word processor
• List two benefits of spreadsheet
• Write function that  totals cell B3 through B10
• Define search engine.
• What is web publishing?

Section(II)

Attempt any three (3) Questions: (3x8=24)

5.what is hard copy output? Write short note on any three hard copy output devices.(2+2+2+2)
6. Define Star topology. Explain the working of star topology with diagram. Also write its advantages. (2+2+2+2)
7. What is modem? Explain different types of modem in details.     (2+2+2+2)
8. Define system busy. Explain three types of system bus in detail.  (2+2+2+2)
9. Define computer virus. Describe three causes of spreading virus and three methods to protect from viruses. (2+2+2+2)