General Computer Test - 138

 

1. The binary representation 100110 is numerically equivalent to

a. the decimal representation 46

b. the octal representation 46

c. the hexadecimal representation 46

d. the binary representation 26

2. The Boolean expression A.B  A.B  A.B is equivalent to

a. A + B

 b. A.B

c. A  B

d. A . B

3. The greatest negative number which can be stored in a computer that has 8-bit wordlength and uses 2's complement arithmetic is

a. -256

 b. -255

 c. -128

 d. -127

4. By taking 2's complement again of the 2's complement of a binary, one gets

a. the 1's complement

 b. the 2's complement

c. the original number

d. the sign magnitude form of the numbers

5. The expression A(A + B) by writing the first term A as A + ) the expression is best simplified as

a. A + AB

 b. AB

c. A

d. A + B

6. In the sign magnitude representation, the leading bit

a. is a part of the number itself

b. is unit for positive numbers

c. is always unit

d. stands for the sign

7. Which of the following is equivalent to the Boolean expression Y  A B  B C  C A

a. AB BCCA

b. (A  B)  (B  C)  (A  C)

c. (A  B)(B C)(C  A)

d. (A  B) (BC) (C A)

8. The OSI reference model defines the function for seven layers of protocols

a. including the user and communication medium.

b. not including the user or communication medium

c. including the communication medium but not the user

d. including the user but not the communication medium

9. The OSI reference model is

a. worthless

 b. a protocol

c. not a protocol

 d. None of these

10. A data packet is a packet header together with

a. a network layer

b. an administrative layer

c. user data

d. a packet switch

11. The application layer of the OSI model is the

a. seventh layer

 b. sixth layer

c. fifth layer

 d. fourth layer

12. Working of the WAN generally involves

a. satellite

 b. frame delay

c. ATM

 d. user agent

13. Which of the following technique provides dedicated communication channel between two stations.

a. switch network

b. circuit switching

c. packet switching

 d. none of these

14. End-to-end conncectivity is provided from host-to-host in

a. network layer

 b. session layer

c. data link layer

 d. transport layer

15. Base band is

a. transmission of signals without modulation

b. a signal all of whose energy is contained within a finite frequency range.

c. the simultaneous transmission of data to a number of stations

d. all of the above

16. The simultaneous transmission of data to a number of stations is known as

a. broad cast

 b. bandwidth

c. Aloha

d. analog transmission

17. The communication mode that supports data in both directions

a. simplex

b. half duplex

c. duplex

d. multiplex

18. Modulation is the process of

a. sending a file from one computer to another computer

b. converting digital signals to analog signals

c. converting analog signals to digital signals

d. echoing every character that is received

19. A distributed network configuration in which all data/information pass through a central computer is

a. bus network

b. star network

c. duplex

 d. multiplex

20. To connect a computer with a device in the same room, you might be likely to use

a. a coaxial cable

 b. a dedicated time

c. a ground station

 d. all of the above

21. Administrative supervision of database activities is the responsibility of the

a. data base administrator

b. DP Manager

c. DB Manager

d. VP-DP administrator

22. Which of the following component of a computer system is the most important to a data base management system

a. mouse

b. high resolution video display

c. printer

d. high speed, large capacity disk

23. What is the serious problem(s) of file management systems

a. data redundancy

 b. difficult to update

c. program dependence

d. All of the above

24. Which of the following contains complete record of all activity that affected the contents of a database during a certain period of time

a. master file

 b. transaction file

c. report

 d. query file

25. In a database, related fields are grouped to form

a. record

 b. file

c. bank

 d. field group

1. b 2. A 3. c 4. c 5. c 6. d 7. c 8. b 9. c 10. c 11. a 12. a 13. b

14. d 15. a 16. a 17. b 18. b 19. b 20. a 21. a 22. d 23. d 24. B 25. a