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9th Class Examination 2015 Computer Science important Question / Mcqs and Complete Notes

9th Class Examination 2015 Computer Science  important Question / Mcqs and Complete  Notes

1. Which is not the Computer Language Translator?
A. Assembler
B. Interpreter
C. Compiler
D. None of them
2. Which computers use analog-to-digital and digital-to-analog conversion?
A. Analog Computers
B. Digital Computers
C. Hybrid Computers
D. None of them
3. Transistors were used in ………….. generation of computers:
A. First
B. Second
C. Third
D. None of them
4. Charles Babbage introduced the idea of:
A. Punch Card Tabulator
B. Difference Engine
C. Analytical Engine
D. Both B and C
5. CRT stands for:
A. Cathode Ray Test
B. Cathode Ray Tube
C. Clear Ray Tube
D. None of them
6. The name of first microprocessor produced by Ted Hoff in 1971 is:
A. IBM 370
B. IBM 1400
C. Intel 4004
D. None of them
7. LCD stands for:
A. Liquid Clear Display
B. Liquid Clean Display
C. Liquid Crystal Display
D. None of them
8. Which code is used to write a program directly in machine code?
A. OP code
B. BCD Code
C. Uni Code
D. None of them
9. Cray T90 system exists in the following Computer Class:
A. Super Computers
B. Mainframes
C. Mini Computers
D. Micro Computers
10. A terminal consists of:
A. Keyboard + Mouse
B. Keybiard + Monitor
C. Mouse + Monitor
D. None of them
11. Which of the following is not a high level language?
A. Assembly
B. ForTran
C. BASIC
D. C/C++
12. Which language is designed for Artificial Intelligence?
A. PASCAL
B. COBOL
C. LISP
D. None of them
13. OOP stands for
A. Out of Object Programming
B. Object Oriented Programming
C. On Object Programming
D. None of them
14. Which of the following is not an analog computer?
A. Slide Rule
B. Curvimeter
C.HarmonicAnalyser
D. None of them
15. A computer is an ……machine that processes data and converts it into information.
A. Electrical
B. Electronic
C. Mechanical
D. None of them
Q.2: Answer the following short questions:

What is a Computer?
Write any two advantages of Transistors.
What is the difference between Analog and Digital Computers?
What is the difference between compiler & interpreter?
What is the difference between Low Level Language and High Level Language?
Define Computer Simulation.
Describe two advantages of online banking.
Who developed IC and write the advantage of IC over Transistors.
Define LISP.
Write the design principles of GW-BASIC.
1. All devices of the system are connected by a communication channel called:
A. Signals
B. Pulse
C. Bus
D. None of them
2. A socket that is responsible to enable an external device with the computer system:
A. Port
B. Bus
C. Control Unit
D. None of them
3. The bus with 32 lines can carry……………bytes of data at a time:
A. 2 bytes
B. 4 bytes
C. 6 bytes
D. None of them
4. The processor has internal storage for processing information is called:
A. Cache
B. Registers
C. Channels
D. None of them
5. A parallel port of 25 pins Comprises:
A. 17 signaling
8 Grounds
B. 20 signaling
5 Grounds
C. 10 signaling
15 Grounds
D. None of them
6. System software are responsible for:
A. Controlling
B. Managing
C. Both A & B
D. None of them
7. ……………….are use regulate and control the speed of all operation inside the control unit:
A. Signals
B. Clocks Pulses
C. Control Bus
D. None of them
8. Which is not the type of system bus?
A. Power Bus
B. Data Bus
C. Address Bus
D. Control Bus
9. Which Operation can not be performed by ALU:
A. Addition & Subtraction
B. Multiplication & Division
C. Comparisons
D. None of them
10. Which of the following is not the part of the computer system?
A. RAM
B. Hard Disk
C. Monitor
D. None of them
11. A set of instructions given to computer to solve a problems is:
A. Software
B. Hardware
C. Malware
D. None of them
12. Which is not the presentation form of data by output unit?
A. Screen display
B. Printed copy
C. Voice via speakers
D. None of them
13. Which is not the function of a computer?
A. Accepting instruction
B. Processing data
C. Controlling operations
D. None of them
14. The physical parts of the computer system are called:
A. Software
B. Hardware
C. Shareware
D. None of them
15. Which is not the application software?
A. Network manager
B. Spread sheets
C. Data buses
D. None of them
Q.2: Answer the following short questions: (Any Ten)

Define EDP?
What is the dependency of a bus capacity?
Write the name of three units of the computer system?
What is the difference between Hardware & Software?
What are Registers?
What is the difference between serial port & parallel port?
How does the CU control the speed of operations?
What is RAM?
What is the difference between data bus & Address Bus?
Define USB?
What is the motherboard?
What is the difference between input unit & output unit?
( Important Long Questions

Q.3 Explain in detail the following.

(a) The role of CPU.

b. Computer Storage
Email This
BlogThis!
Share to Twitter
Share to Facebook
Share to Pinterest1. ……………key provide shortcuts to do routines task:
A. ESC
B. F1
C. HOME
D. None of them
2. Which are mouse events?
A. Left Click
B. Right Click
C. Drag
D. All of them
3. There are distinct pauses in:
A. Continuous speech
B. Normal speech
C. Discrete speech
D. None of them
4. The advantage of track ball over mouse is:
A. Stationary occupying less space
B. Compact and beautiful
C. Popular pointing device
D. None of them
5. OCR stands for:
A. Optical Clear Reader
B. Optical Character Reader
C. Optical Character Recognition
D. None of them
6. The device that directly stores images digitally:
A. Scanner
B. Digital camera
C. Light Pen
D. None of them
7. LCD stands for:
A. Liquid Clean Display
B. Liquid Crystal Display
C. Low Crystal Display
D. None of them
8. The hole in shadow mask are used for:
A. To set the picture quality
B. To fit its mesh finely
C. To align the electron beams
D. None of them
9. CAM stands for:
A. Computer Added Mechanism
B. Computer Aided Manufacturing
C. Computer And Maintains
D. None of them
1. The CRD can hold data:
A. 700 MB
B. 750 MB
C. 800 MB
D. None of them
11. LED discharges portions of ………….to form character or graphics in laser printers:
A. Paper
B. Drum
C. Toner
D. None of them
12. SVGA stands for:
A. Super Video Graphic Adapter
B. Super Video Graphic Acceleration
C. Super Video Graphic Array
D. None of them
13. Hard disk is a …………..disk:
A. Optical
B. Magnetic
C. Both
D. None of them
14. Which is not an output device?
A. Monitor
B. Keyboard
C. Mouse
D. None of them
15. In which printer toner is used:
A. Dot Matrix
B. Inkjet
C. Laser
D. None of them

Q.2: Answer the following short questions: 20

What is a shadow mask?
Define monitor resolution?
What is the difference between Hard Copy and Soft Copy?
What is the voice recognition system?
Why do we use function keys?
Where video controllers perform its role?
Are Daisy-wheel printers loud and slow? Explain.
What is a plotter?
What is the difference between Impact and non impact printers?
How can we stop the pointer while using joystick?

Q.3 Explain in detail the following.

(a) Laser printers.

(b) Ink jet printers.
1. 1MB of data is equal to:
A. 210 bytes
B. 220 bytes
C. 230 bytes
D. None of them
2. We can access data from a secondary storage device with:
A. Two way
B. Three way
C. Four way
D. All of them
3. A stepper motor rotates:
A. Head
B. Disk Motor
C. Gear Shaft
D. None of them
4. Access is equal to :
A. Seek time
-Rotational Delay

B. Compact and beautiful
C. Popular pointing device
D. None of them
5. In magnetic types , last bit is used to store:
A. Parity Bit
B. Sign Bit
C. LSB
D. None of them
6. On FDD there is small indicator light that stays …………during read / write data on it?
A. ON
B. OFF
C. Blinking
D. None of them
7. Which is not the feature of
A. Expensive
B. Slow Access
C. Small Capacity
D. None of them
8. Direct Access is also Known as:
A. Sequential Access
B. Serial Access
C. Random Access
D. None of them
9. The drive makes the track and sector on the disk during:
A. Low level Formatting
B. Medium level Formatting
C. High level Formatting
D. None of them
10. All the tracks with same track number make:
A. Drum
B. Cone
C. Cylinder
D. None of them
11.Tape storage is:
A. Slower then HD
B. Faster then HD
C. Direct Access
D. None of them
12. Primary memory is directly accessible to the
A. Processor
B. Other components
C. User
D. None of them
13. The collection of bytes is simply named as:
A. Stack
B. File
C. Framer
D. None of them
14. The memory used inside the CPU is:
A. CHE
B. PRON
C. EPROM
D. None of them
15. The data writren an EPROM can be erased by:
A. Alpha Rays
B. Beta Rays
C. Gamma Rays
D. Ultraviolet Rays

Q.2: Answer the following short questions: (10×2=20)
1. Define cache memory/
2. What is difference between SRAM and DRAM?
Compare primary memory with secondary memory?
What is difference between high level Formatting and low level Formatting?
What is seek time?
Define EPROM?
What is the difference between MSB and LSB?
What is the difference between rotational delay and transfer delay?
What is the difference between a track and a sector?
Define access time?
Detail the following.
(a) Describe in detail working and purpose of compact disks? 7.5
(b) How does memory works? 7.5
1. The processed collection of facts and figures is called:
A. Data
B. Information
C. Representation
D. None of them
2. The weight of digits-7 in number 57231.21is:
A. 104
B. 103
C. 102
D. All of them
3. The equivalent number of 27 in binary is:
A. 111000
B. 100100
C. 011011
D. None of them
4. 0.04 is equivalent in decimal is:
A. 0.3
B. 0.4
C. 0.5
D. None of them
5. 2’s complement of 01100110 is:
A. 10011010
B. 11100101
C. 10011101
D. None of them
6. The product of 0110 and 1011 is:
A. 1001010
B. 1000010
C. 1100010
D. None of them
7. Which format is to represent the Fixed Point Number Representation?
A. 1 Bits = Sign Bit
9 Bits = Integral part
6Bits = Fractional part
B. 1 Bits = Sign Bit
8 Bits = Integral part
7Bits = Fractional part
C. 1 Bits = Sign Bit
96 Bits = Integral part
9Bits = Fractional part
D. None of them
8. If sign Bit is O bit then number will be:
A. Negative
B. Positive
C. Zero
D. None of them
9. Unicode is …………bit coding scheme.
A. 8-bit
B. 16-bit
C. 24-bit
D. None of them
10. What is the equivalent of 9807 BCD?
A. 1000
1001
0000
0111
B. 1001
0000
1000
0111
C. 1001
1000
0000
0111
D. None of them
11.(011)4752105 is:
A. Numeric Data
B. Alphabetic Data
C. Alphanumeric Data
D. None of them
12. The Hexadecimal number (10)16 is equal to:
A. (10)10
B. (100)10
C. 16(10)
D. None of them
13. Computer manipulate in terms of:
A. Binary NS
B. Octal NS
C. Hexadecimal NS
D. None of them
14. In 2’s compliment method , end carry is :
A. Added
B. Subtracted
C. Discarded
D. None of them
15. ASCII is a 7- bit Coding System published by:
A. ISO
B. IEEE
C. IANA
D. Ultraviolet Rays

Q.2: Answer the following short questions: (Any Ten)
1. Convert A1.03 into Binary.
2. Convert 11010.11 into Octal.
Represent 36.25 in 16-bit Fixed Point Form.
Define the term Number System? Also state which Number System is recognized by the computer system?
What is the difference between Integer Data and Alphanumeric Data?
Convert 1110.11 into decimal number system.
Find 2’s Complement of 76 using 10-bits.
What is the difference between MSB and LSB?
Define Unicode.
Calculate 0110 X 1011

Q.3: Calculate – 54 – 30 using 8-bits 2’s complement method.

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