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