SHORT QUESTIONS Of COMPUTER BEST MCQS

 SHORT QUESTIONS Of COMPUTER BEST MCQs

1. What are the two basic parts of a computer system?

Hardware and software are the two basic parts of a computer system.

2. What is the hardware?

The physical and permanent components of a computer are called hardware. For

example monitor, keyboard, printer, mouse etc

3. Enlist the basic types of hardware?

i. CPU

ii. Memory

iii. Input/output devices

4. What is software?

A set of electronic instructions consisting of complex codes, or programs, that makes up

the computer are called the software. For example MS-Windows 2000 Professional,

MS-Word 2000, Jet Audio etc.

5. Enlist the basic types of software?

i. System software

ii. Application software

6. What is the functional study of the computer?

The functional study of computers means the study of computer software.

7. What is the data processing cycle?

The user inputs the data through the input unit; the data goes for processing, meanwhile or

after processing results stored in memory temporarily/permanent and then the output of

results (information) goes to the output unit.

8. What are the basic units of the computer?

Input unit, Processing unit, and Output units are the basic units of computers.

9. Enlist the basic parts of the Processor?

i. Arithmetic and logic unit

ii. Memory unit

iii. Control unit

10. Write down the functions of any input device?

i. It accepts (or reads) the list of instructions and data from the outside world of

computers.

ii. It converts these instructions and data in computer acceptable form.

iii. It supplies the converted instructions and data to the computer system for further

processing.

11. Where CPU resides?

CPU resides on the motherboard.

12. What are the functions of the CPU?

i. Fetch, means get instruction or data from Main Memory

ii. Decode, translate it into computer commands

iii. Execute, means actually process the command

iv. Store means to write the results in the main memory

13. Enlist the basic functions of the memory unit?

i. Having all the data to be processed and the instructions required for processing

(received from input devices).

ii. Having intermediate results of processing.

iii. Having final results of processing before these results are released to an output

device.

14. What is Address?

Each storage location in memory is distinguished by a unique number called its

address.

15. Enlist the functions of ALU?

i. This is the calculating section of the computer. It performs arithmetic processing like

addition, subtraction, multiplication, division exponention.

ii. The other function of ALU is to allow the computer system to make decisions during

the execution of the program, called the logical operation or decision like less than,

greater than, equal to, not equal to etc.

iii. Remember that some of the logical operations/decision making can be done on the

text data.

iv. It can also compare alphabetic information, such as names or determine whether

one name is the same as or different from another.

16. Enlist the basic functions of CU?

i. It is like a traffic policeman controlling the movements of vehicles on the road.

The Control unit controls the flow of data inside the computer system. It is the “nervous

system” of the machine. It coordinates and controls the computer system just as the

brain directs the body. It does not execute the instructions itself but instead directs

other parts of the computer system to do so.

ii. It controls all the units/devices or parts of computer system directly or indirectly. It

obtain instructions from the internal memory unit. After interpreting, the control unit

transmits directions to the appropriate components of the computer. Ordering them

to perform the required operations.

iii. Directly control to ALU and MU.

iv. Indirectly control to input and output units.

v. The control unit tell the input device and secondary storage device what data and

instructions to read into memory, tell the ALU where the data to be processed, what

operations to perform on data, where in memory the results are to be stored and

finally, it directs the appropriate output devices to convert processed data into

human readable form. After an instruction is executed the control unit proceeds to

the next instruction.

vi. How i/o devices knows that its time to get data from computer or enter data to

system this is done by cu.

vii. Only final results of an execution is send to out put devices

viii.It manages the order of execution.

17. What is the output unit?

Unit which is used to get data from the computer to user is called the output unit.

18.Write down the functions of any output device?

i. It accepts the results produced by the computer which are in coded form and hence

cannot be easily understood by us.

ii. It converts these coded results to human acceptable(readable) form,

iii. It supplies the converted results to the outside world.

19. What is the motherboard?

All the physical components of computer reside on a circuit board called the

motherboard (or mainboard).

20. What are the peripheral devices?

The input devices and the output devices provide the means of communication between

the computer and the outer world. These are also known as Peripheral Devices

because these surround the computer.

21. What is input?

It is a process to enter something.

22.How can you define the word Device?

Device is purely based on electronics circuits.

23.Define input devices?

A device which is used to accept data from the user, translate it into computer

understandable form and sends to internal parts for further processing.

24.Write down the types of input devices?

i. Standard input devices

ii. Nonstandard input devices

25.Give exampled of standard input devices?

i. Keyboard

ii. Mouse

26.Give exampled of nonstandard input devices?

i. Scanner

ii. Light pen

iii. Joy stick etc

27.Write down the types of output devices?

i. Standard output devices

ii. Nonstandard output devices

Or

i. Softcopy output device

ii. Hardcopy output devices

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28.Give exampled of standard output devices?

i. Monitor

ii. Printer

29.Give exampled of nonstandard output devices?

i. Plotter

ii. Speaker

iii. PC-Projector etc

30.What is softcopy?

The untouchable copy is called softcopy. For example output from monitor or speaker is

the softcopy.

31.What is hardcopy?

The touchable copy is called hardcopy. For example output from printer or plotter is the

hardcopy.

32.Give exampled of softcopy output devices?

i. Monitor

ii. Speaker

iii. PC-Projector

33.Give exampled of hardcopy output devices?

i. Printer

ii. Plotter

34.Which coding system is associated with the keyboard?

American Standard Code for Information Interchange (ASCII) is associated with the

keyboards.

35.How many keys are present in IBM Enhanced Keyboard layout?

101 keys are present in IBM Enhanced Keyboard layout.

36.How many types of keyboards we have? Name them?

We have two types of keyboard:

i. General purpose keyboards

ii. Special purpose keyboards

37.In how many groups the keys of IBM Enhanaced Keyboard are divided? Name

them?

There are 6-groups:

i. Alphanumeric keys

ii. Modifier keys

iii. Numeric keypad

iv. Function keys

v. Cursor-movement keys

vi. Special-purpose keys

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38.Where the functional keys arise? Briefly explain their purpose?

The keys are usually arranged in a row along the top of the keyboard, these are twelve

in number from F1 to F12. Each Function key‟s purpose depends on the program we

are using. For example, F1 is the help key.

39.What is mouse?

A Mouse is a point and draw type of standard input device that rolls around on a flat

surface and controls the pointer.

40.What are the functions/operations performed by a mouse?

Following are the functions of a mouse:

i. Pointing

ii. Clicking

iii. Double-clicking

iv. Dragging

v. Dragging and Dropping

vi. Right-clicking

41.What is scanner?

Scanners allow information such as a photo or text to be input into a computer i.e. it is

used to convert hardcopy into softcopy.

42.What is output?

It is a process to get something.

43.Define output devices?

A device which is used to get processed data called information, translate it into user

understandable form, and gives output.

44.What are the other names of monitor?

Other name of monitors are: Display Unit, Screen, Display Screen, Video Display

Terminal (VDT), Video Display Unit (VDU), Screens, Cathode Ray Tube (CRT), Liquid

Crystal Display (LCD).

45.What is XVGA?

It stands for Extended Video Graphic Array, which offers up to 16.7 million colors.

46.Define Printer?

It is a hardcopy, standard output device, which is used to give the color or back and

white printing of any type of data.

47.How many types of printers we have?

We have two types of printers:

i. Impact printers

ii. Non impact printers

48.What is DPI?

It stands for “dots per inch”. More the DPI rate of printer or scanner, clearer will be the

image i.e. real image.

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49.Which factors are to took while buying a printer?

We need to look following factors while buying a Printer:

i. Speed or output

ii. Quality of output

iii. Size

iv. Multiple carbon copies

v. Expense of ink or toner

vi. Initial cost

vii. Operational cost

50.Name some of the devices which can be used as input as well as output devices?

i. Processing devices

ii. All the memory devices like:

iii. Network devices like:

iv. Terminal

v. Touch Screen Monitors

vi. Audio cards

vii. Video cards

viii.Digital cameras etc

51.What is Bus?

The bus is a group of wires on the main circuit board of the computer. It is a pathway for

data flowing between components.

52.What is microprocessor?

The computer‟s brain which organizes and carries out instructions from either the user

or the software. It is also simply known as processor or central processing unit (CPU).

53.What is hertz?

Number of machine cycles completed per second.

54.What are the speed limits and front bus speeds of P-I, PII, P-III and P-IV

computers?

Microprocessor’s Speed

Model Name Speed Limit Front Bus

Pentium-I 100MHz to 233MHz 66MHz

Pentium-II 233MHz to 450MHz 100MHz

Pentium-III 450MHz to 1.3GHz 133MHz

Pentium-IV 1.4GHz to Onwards 400MHz to 800MHz

55.What is the speed of light?

Speed of electron is the speed of light that is 1,86,000 miles per second.

56.Define memory?

Memory is the electronic or magnetic holding place for instructions and data that our

computer's microprocessor can reach quickly.

57.What do you know about memory/storage units?

These are the units to measure the computer‟s memory. Following is their detail:

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Unit

Name

Unit

Symbol

Unit

Size

Bit b -

Nibble N 4-Bits

Byte B 8-Bits

Kilo Byte KB 1024-Byte

Mega Byte MB 1024-Kilo Byte

Giga Byte GB 1024-Mega Byte

Tera Byte TB 1024-Giga Byte

Peta Byte PB 1024-Tera Byte

Exa Byte EB 1024-Peta Byte

Zetta Byte ZB 1024-Exa Byte

Yotta Byte YB 1024-Zetta Byte

58.How many types of memory we have? Name them?

We have two types of memory. Their names are:

i. Primary memory or Primary storage devices

ii. Secondary memory or Secondary storage devices

59.What is primary memory?

It is also known as the main memory of computer. The data stored in this type of

memory is of temporary nature and stays in memory until processing. As this memory is

costly so its size is limited than the secondary memory.

60.What are the other names or primary memory?

Its other names are Main memory,Volatile memory, Temporary memory etc.

61.What are the types of primary memory?

i. Random Access Memory (RAM)

ii. Read Only Memory (ROM)

62.What are the types of RAM?

i. Dynamic Random Access Memory (DRAM)

ii. Static Random Access Memory (SRAM)

63.What are the types of ROM?

i. Programmable Read Only Memory (PROM)

ii. Erasable Programmable Read Only Memory (EPROM)

iii. Electrically Erasable Programmable Read Only Memory (EEPROM)

64.What is secondary memory?

It is also known as the auxiliary memory or auxiliary storage or permanent memory of

computer. The data stored in this type of memory is of permanent nature and stays in

memory permanently. As this memory is cheap so its size is more than the primary

memory. Devices which are used to store secondary memory are called the “secondary

storage devices”.

65.What are the other names of secondary memory?

It other names are Auxiliary memory, Non volatile or Electromagnetic memory,

Permanent memory etc.

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66.What are the types/examples of secondary memory?

i. Magnetic Storage Media:

a. Magnetic Tape Storage

b. Magnetic Disks Storage:

1. Hard Disks

2. Floppy Disks

ii. Optical Storage Media:

c. CR-ROM

d. Rewriteable Optical Disk

e. DVD-ROM

f. WORM Disk

g. Zip Disks etc.

67.What is track?

Each magnetic disk consists of a number of invisible circles called Tracks.

68.What is Cylinder?

A set of corresponding tracks in the entire surface is called Cylinder.

69.What is Sector?

Tracks on a disk are split up into Sectors.

70.How to check performance of a hard disk?

i. The data rate - the number of bytes per second that the drive can deliver to the

CPU. Rates between 5 and 40 megabytes per second are common.

ii. The seek time - the amount of time it takes between the time that the CPU requests

a file and the first byte of the file starts being sent to the CPU. Times between 10

and 20 milliseconds are common.

71.What are the sizes, densities and capacities of floppy disks?

Size Density Capacity

5.25” Double 360KB

5.25” High 1.2MB

3.5” Double 720MB

3.5” High 1.44MB

72.What is CD-ROM?

CD-ROM stands for “compact disk-read only memory”. It is new technology of storage

media as compare to floppy disks. These are made up of flexible material such as

plastic etc. their storage capacity is from 680MB to 1GB. These can be written once and

can be read so many times, but its contents can not be changed. But now we also have

rewritable CDs.

73.What is DVD-ROM?

DVD-ROM stand for “Digital Versatile Disk Read Only Memory”. It is a new

development that has dramatically increased the storage capacity of data. It offers high

quality of audio and video. It can store up to 2GB of data. It uses a short wavelength of

LASER to read and write data on it. It has two tracks each for audio and video, it makes

full use of each track to give high quality of audio and video. It was first used in Holly

Wood Film Industry.

74. What is a WORM?

It stands for “Write Once Read Many”. It is a disk-like CD-ROM, but it can store greater

amount of data. It is used in workstations and supercomputers. This can store up to

200GB of data. Famous libraries