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Mcqs of Computer Science and Information Technology

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1. Who developed the first all electronic computers by 1940?
(a) Clifford Bery
(b) George Boole
(c) Atanasuff and Berry
(d) John V. Atanasoff
Answer : Atanasuff and Berry
2. The high voltage level of a digital signal in positive logic is :
(a) 0
(b) 1
(c) either 0 or 1
(d) None of these
Answer : 1
3. The Gateway Internet Access Services (GIAS) of India is situated in
(a) Delhi
(b) Mumbai
(c) Chandigarh
(d) Madurai
Answer : Mumbai
4. Octal 6 is equal to decimal :
(a) 14
(b) 16
(c) 15
(d) 13
Answer : 14
5. In decimal system the base or radix is :
(a) 1
(b) 0
(c) 10
(d) None of these
Answer : 10
6. Which logic gate is similar to the function of two series switches?
(a) NOR
(b) OR
(c) AND
(d) NAND
Answer : OR
7. How many flip flops are needed for a 4 bit counter?
(a) 3
(b) 4
(c) 6
(d) None of these
Answer : 4
8. Which of the following is not a HIGH LEVEL computer programming language?
(a) COBOL
(b) FORTRAN
(c) MODEM
(d) None of these
Answer : COBOL
9. A device with slowest switching speed is :
(a) Nixie tubes
(b) LED
(c) LCD
(d) None of these
Answer : LCD
10. The connecting leads in an IC chip are made of :
(a) Aluminium
(b) Silicon
(c) Calcium
(d) None of these
Answer : Aluminium
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11. A memory used for storing variable quantities is :
(a) RAM
(b) EPROM
(c) ROM
(d) PROM
Answer : RAM
12. Which of the following is the minimum error code?
(a) Gray code
(b) Octal code
(c) Binary code
(d) None of these
Answer : Gray code
13. Which of the following is a temporary memory?
(a) ROM
(b) RAM
(c) Both
(d) None of these
Answer : RAM
14. Which of the following uses the least power?
(a) ECL
(b) CMOS chip
(c) TTL
(d) None of these
Answer : CMOS chip
15. The decimal equivalent of the hexadecimal number ES is:
(a) 327
(b) 229
(c) 279
(d) None of these
Answer : 229
16. Which logic gate is similar to the function of two parallel switches?
(a) NAND
(b) AND
(c) OR
(d) NOR
Answer : OR
17. A type of memory chip whose contents can be quickly changed by the computer at any time is called:
(a) VDT
(b) RUM
(c) ROM
(d) RAM
Answer : RAM
18. The number of levels in a digital signal is
(a) One
(b) Two
(c) Four
(d) None of These
Answer : Two
19. A device that converts from decimal to binary number is called :
(a) Encoder
(b) Decoder
(c) Converter
(d) None of these
Answer : Encoder
20. ‘Mega Bytes’ is the unit for measuring which of the following :
(a) Density of population
(b) Intensity of earthquakes
(c) Memory capacity of a computer
(d) None of these
Answer : Memory capacity of a computer
21. The radix of a decimal system is :
(a) 8
(b) 3
(c) 16
(d) 2
Answer : 8
22. The logic circuit corresponding to – ‘sign’ is :
(a) NAND gate
(b) AND gate
(c) NOR gate
(d) OR gate
Answer : NOR gate
23. When family of logic circuits circuits uses field effect transistors?
(a) CMOS
(b) Both ‘A’ or ‘B’
(c) TTL
(d) None of these
Answer : CMOS
24. Which of the following stands for one million floating point operations a second?
(a) Floating Point
(b) Megaflops
(c) Nanflops
(d) Speed
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