1. If 2 persons work in 24 hours. One person work in 10 hours ,how many hours other person work?

2. A cylinder of height 30 feet and diameter 8feet is made out of steel sheet .. How much sheet will be required to make it ?

Answer :  272

3. How can u represent 64Kb

a) 8 8bit words    b)4 4bit words          c)2 16bit words     

Answer :   8 8bit words

4. How do u represent a negative number in ones complement?

Answer : complement and add 1

5. If the angle of incidence is less than angle of critical angle,then there is loss in cladding due to

a) Rayleigh's scattering            b) scattering            c) absorption             d) bending

6. The smallest unit in memory is

Answer : bit

7. Which is not a search engine?

a) google        b) lycos              c) altavista       d) none of these      

8. There are 12 black mouse and 1 white mouse in a circle.The counting starts from one white mouse. The cat start eating the mouse and begins with black mouse then it eats 13th mouse. From which no. it should start eating so that the last mouse is white?

Answer : 5

9. What does the command shutdown do?

Answer : log out all the processes of the computer

10. Which is a type of primary memory?

a) RAM and ROM             b) HDD         c) CDROM            d) none of these     

Answer : a) RAM and ROM

11. Which hardware implements stack operation in 8085/8086

a) ROM                 b) PROM            c) RAM             d) none of these   

Answer : RAM

12. Two trains of lengths 200 and 100m if moving in same direction takes 30 sec to cross . If moving in opposite directions take 20 sec. What are the speeds of the trains?

Answer : 22.5 and 7.5 m/s

13. What is runlevel 6 in unix?

Answer :  reboot

14. Command for reboot in unix

Answer : init 6

15. One man took Rs. 600 to complete the work and one woman took Rs. (…) to complete the work. If the daily wages of the man is Rs. 60 and for woman is Rs. 15.Find how much wages will be required when both works together?

Answer : Rs. 450

16. U can weigh x times on a balance ,there were nine coins from which one was fake coin with higher weight.Find x to find out the false coin.

Answer : 3