Computer Science For Class XI / HSC/FSC part 1 /1st Year (Science Group) - Past Paper 2013

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Computer Science
For Class XI (Science Group)
Past Paper 2013

COMPUTER SCIENCE   2013

Time: 20 Minutes     Max. Marks: 15

SECTION "A" (MULTIPLE CHOICE QUESTIONS)

1. Choose the correct answer for each from the given options:
(i) ASCII is an abbreviation of:

• Application Software Code for Information Interchange
• American Standard Code for Information Interchange ✓
• American System Code for Information Interchange
• American Symbolic Code for Information Interchange

(ii) Compiler is a / an:

• Operating System
• Language Translator ✓
• Debugger
• Linker

(iii) The component of CPU that manages all operations is called:

• Control Unit ✓
• Memory Unit
• Arithmetic and Logic Unit
• None of these

(iv) This is a computer crime:

• Backup
• Restoring
• Hacking ✓
• Formatting

(v) This is not a computer virus:

• Time Bomb
• worm
• Trojan Horse
• CD Rom ✓

(vi) OSI model has:

• 6 Layers
• 5 Layers
• 7 Layers ✓
• 8 Layers

(vii) The internal process of starting up a computer is known as:

• Booting ✓
• Self start
• Warm up
• Start up

(viii) Accumulator is a type of register found in:

• Control Unit
• Memory Unit
• Hard disk
• Arithmetic and Logic Unit ✓

(ix) The electrical path used to transfer data in CPU is called:

• Wire
• Cable
• Bus ✓
• All of these

(x) A mathematical expression that is used to perform calculation on worksheet is known as:

• Cell
• Formula ✓
• Format
• Address Bar

(xi) The most reliable topology is:

• Star ✓
• Bus
• Ring
• Tree

(xii) The common Language of internet to develop a web page is:

• WWW
• HTTP
• HTML ✓
• BASIC

(xiii) The method of communication that allows data to travel in only one direction is called:

• Simplex ✓
• Half duplex
• Half simplex
• Full duplex

(xiv) Laser beam technology is used in:

• Optical disk ✓
• Magnetic disk
• Floppy disk
• Hard disk

(xv) An operating system falls in the category of a / an:

• Application Software
• System Software ✓
• Network Software
• None of these

COMPUTER SCIENCE   2013

Time: 2 Hours 40 Minutes   Marks: 60

SECTION 'B' (SHORT-ANSWER QUESTIONS) (36)

NOTE: Answer any 6 part questions from this section. No answer should exceed 6 to 7 lines.
2.(i) Define Star Topology with diagram.
(ii) What is Internet? Name its components.
(iii) What does Network Protocol mean? Name any three protocols with their abbreviations.
(iv) What is Modem? Why is it necessary for internet?
(v) Write the full forms of the following abbreviations: DPI, USB, DIMM, GAN, TCP, CRT.
(vi) What is Information Technology? Describe any three fields of IT.
(vii) State Copyright Law. Give its advantages.
(viii) Define the term Bus. Describe the functions of any two Buses.
(ix) State four points to show that e-commerce is advantageous in modern business.

SECTION'C' (DETAILED- ANSWER QUESTIONS)

NOTE: Answer any Two questions from this section. All questions carry equal marks. (24)
3.(a) What is Software? Explain its different types.
(b) What is e-mail? Write its advantages and disadvantages.

4.(a) What is Communication Media? Discuss the various medias used in data Communication.
(b) Define CPU Registers. Discuss their various type.

5.(a) Define OSI model. Describe the functions of each layer of OSI model with diagram.
(b) What is a Computer Virus? How can we protect our Computer from it?