Sunday, 25 January 2015


1. What is the responsibility of the logical unit in the CPU of a computer?
a) Producing result
b) Comparing numbers
c) Controlling flow of information
d) Performing mathematical operations
e) Controlling flow of data

2. Abacus was the first ___
a) Electronic computer
b) Mechanical computer
c) Electronic calculator
d) Mechanical calculator
e) Electronic chip

3. If in a computer, 16 bits are used to specify address in a RAM, the number of addresses will be ___
a) 216
b) 65,536
c) 64K
d) 128K
e) 135K

4. Instructions and memory address are represented by ___
a) Character code
b) Binary code
c) Binary word
d) Parity bit
e) Bite code

5. The terminal device that functions as a cash register, computer terminal and OCR reader is:
a) Data collection terminal
b) OCR register terminal
c) Video Display terminal
d) POS terminal
e) None of the above

6. A set of flip flops integrated together is called ____
a) Counter
b) Adder
c) Register
d) Flip flop
e) All of the above

7. People often call ______ as the brain of computer system.
a) Control Unit
b) Arithmetic Logic Unit
c) Central Processing Unit
d) Storage Unit
e) Store data

8. Which of the following is used for manufacturing chips?
a) Bus
b) Control unit
c) Semiconductors
d) a and b only
e) None of the above

9. The value of each bead in heaven is ___
a) 1
b) 3
c) 5
d) 7
e) 8

10. The first computer introduced in Nepal was ___
a) IBM 1400
b) IBM 1401
c) IBM 1402
d) IBM 1406
e) IBM 1405

11. Bluetooth is a type of radio wave information transmission system that is good for about:
a) 30 feet
b) 30 yards
c) 30 miles
d) 300 miles
e) 3000 miles

12. The telephone is an example of a(n)____ signal.
a) analog
b) digital
c) modulated
d) demodulated
e) compiler

13. Acredit card-sized expansion board that is inserted into portable computers that connects the modem
to the telephone wall jack is:
a) Internal modem
b) External modem
c) PC Card modem
d) Wireless modem
e) Wired modem

14. A modem that is contained within the system unit is called:
a) External
b) Internal
c) Wireless
d) Wi-Fi
e) Bluetooth

15. A modem that doesn't need to be connected to a telephone line is the ___ modem.
a) external
b) internal
c) wireless
d) DSL
e) NSL

16. Aspecial high-speed line used by large corporations to support digital communications is known as:
a) satellite/air connection service lines
b) cable modems
c) digital subscriber lines
d) T1, T2, T3 and T4 lines
e) None of the above

17. An affordable technology that uses existing telephone lines to provide high-speed connections
is called ________.
b) microwave
c) cable modem
d) DSL
e) ALU

18. The capacity of a communication channel is measured in ___
a) Bandwidth
b) Bit capacity
c) Baud rate
d) Data flow
e) Store data

19. A relatively new technology that allows wireless connectivity:
a) Bluetooth
b) Black tooth
c) Blue band
d) Broadband
e) Wi- fi

20. In MS-DOS 5.0, which is the number that acts as a code to uniquely identify the software product?
a) MS
b) DOS
d) 5.0
e) 4.2.0

21. A page fault:
a) Is an error in a specific page
b) Occurs when a program accesses a page of memory
c) Is an access to a page not currently in memory
d) None of the above
e) All of the above

22. The process of transferring data intended for a peripheral device into a disk or intermediate store so that it can be transferred to peripheral at a more convenient time or in bulk, is known as ___.
a) Multiprogramming
b) Spooling
c) Caching
d) Virtual programming
e) Code programming

23. An instruction in a programming language that is replaced by a sequence of instructions prior to assembly or compiling:
a) Procedure
b) Macro
c) Label
d) Literal
e) External

24. Banker's algorithm for resource allocation deals with:
a) Deadlock prevention
b) Deadlock avoidance
c) Deadlock recovery
d) Mutual exclusion
e) Data recovery

25. The state of a process after it encounters an I/O instruction is _____.
a) Ready
b) Blocked/ Waiting
c) Idle
d) Running
e) Compiling

26. The number of processes completed per unit time is known as__.
a) Output
b) Throughput
c) Efficiency
d) Capacity
e) Input

27. Which of the following file name extension suggests that the file is Backup copy of another file?
a) TXT
b) COM
c) BAS
d) BAK
e) BAT

1) b; 2) d; 3) b; 4) b; 5) d; 6) c; 7) c; 8) c; 9) c; 10) b
11) a; 12) a; 13) c; 14) b; 15) c; 16) d; 17) d; 18) a; 19) a; 20) d;
21) c; 22) b; 23) b; 24) b; 25) b; 26) b; 27) d.

Types of Computer

On the basis of working principle there are three types of computers.

a)Analog Computer
An analog computer (spelt analogue in British English) is a form of computer that uses continuous
physical phenomena such as electrical, mechanical or hydraulic quantities to model the problem being solved.
1. Thermometer
2. Speedometer
3. Petrol Pump Indicator
4. Multi meter

b) Digital Computer
Acomputer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system.

c) Hybrid Computer (Analog + Digital)
A combination of computers those are capable of inputting and outputting in both digital and analog
signals. A hybrid computer system setup offers a cost effective method of performing complex simulations.

On the basis of Size..
a)Super Computer 
It is the fastest computer. Supercomputers are very expensive and are employed for specialized applications that require immense amounts of mathematical calculations.
For example, weather forecasting requires a supercomputer. Other uses of supercomputers
include animated graphics, fluid dynamic calculations and nuclear energy research and petroleum
The major difference between a supercomputer and a mainframe is that a supercomputer channels
all its power into executing a few programs as fast as possible, whereas a mainframe uses itspower to execute many programs concurrently.

b)Mainframe Computer
A very large and expensive computer capable of supporting hundreds and even thousands of users
simultaneously. In the hierarchy that starts with a simple microprocessor (Eg: in watches) at the
bottom and moves to supercomputers at the top, mainframes are just below supercomputers. In
some ways, mainframes are more powerful than supercomputers because they support more simultaneous programs. But supercomputers can execute a single program
faster than a mainframe.

c) Mini Computer
In size and power, minicomputers lie between workstations and mainframes. In the past decade, the distinction between large minicomputers and small mainframes has blurred, however, as has the
distinction between small minicomputers and workstations. But in general, a minicomputer is a
multiprocessing system capable of supporting from 4 to about 200
users simultaneously.

d)Micro Computer
i. Desktop Computer: A personal or micro-mini computer sufficient to fit on a desk.
ii. Laptop Computer: A portable computer complete with an integrated screen and keyboard. It is
generally smaller in size than a desktop computer and larger than
a notebook computer.
iii. Palmtop Computer/ Digital Diary/ Notebook / PDAs:Ahandsized computer. Palmtops have no keyboard but the screen serves both as an input and output device.

It is a terminal or desktop computer in a network. In this context, workstation is just a generic term
for a user's machine (client machine) in contrast to a "server" or "mainframe."

Major brands of the computer:
a) IBM/ IBM Compatible Computers
b) Apple/ Macintosh.