OBJECTIVE GENERAL KNOWLEDGE - COMPUTER AWARENESS(PART-01)

 OBJECTIVE GENERAL KNOWLEDGE - COMPUTER AWARENESS

1. If 4 in binary system is 100 , then 8 will be :
1. 111
2. 100
3. 1000
4. 10
2. High voltage level of a digital signal in positive logic is :
1. 0
2. 1
3. either 0 or 1
4. none of these
3. Boolean expression for NAND gate is :
1. Y=A+B
2. Y=AB
3. Y=A
4. A=A
4. Octal 6 is equals to decimal :
1. 14
2. 15
3. 16
4. 13
5. In decimal system the base or radix is :
1. 1
2. 0
3. 10
4. none of these
6. Which logic gate is similar to the function of two series switches?
1. NOR
   
2. OR
3. AND
4. NAND
7. How many flip fops are needed for a 4 bit counter?
1. 3
2. 4
3. 6
4. none of these
8. Which of the following is not a high level computer programming language?
1. COBOL
2. FORTRAN
3. MODEM
4. non of these
9. A device with slowest switching speed is :
1. Nixie tubes
2. LED
3. LCD
4. none of these
10. The connecting leads in an IC chip are made of :
1. Aluminium
2. Silicon
3. Calcium
4. Copper
11. A memory used for storing variable quantities is :
1. RAM
2. EPROM
3. ROM
4. PROM
12. Which of the following is the minimum error code?
1. Gray code
2. Octal code
3. Binary code
4. none of these
13. Which of the following is a temporary memory?
1. ROM
2. RAM
3. both
4. none of these
14. Which of the following uses the least power?
1. ECL
2. CMOS chip
3. TTL
4. none of these
15. Out of LCD and LED which display consumes the least power?
1. LED
2. LCD
3. both consumes same power
4. none of these
16. The decimal equivalent of the hexadecimal number ES is :
1. 327
2. 229
3. 279
4. 278
17. Which logic gate is similar to the function of two parallel switches?
1. NAND
2. AND
3. OR
4. NOR
18. The binary number 101100.110 in octal number will be :
1. 145.6
2. 174.6
3. 152.6
4. 154.4
19. The number of levels in digital signal is :
1. 1
2. 2
3. 4
4. 3
20. A device that converts from decimal to binary number is called :
1. Encoder
2. Decoder
3. Convertor
4. none of these