1). Piggy backing is a technique for

a) Flow control b) sequence c) Acknowledgement d) retransmission

Ans: c piggy backing

2). The layer in the OST model handles terminal emulation

a) session b) application c) presentation d) transport

Ans: b application

3. there is an employer table with key feilds as employer no. data in every n'th row are needed for a simple following queries will get required results.

a) select A employe no. from employe A , where exists from employe B where A employe no. >= B employe having (count(*) mod n)=0

b) select employe no. from employe A, employe B where A employe no. >= B employ no. grouply employe no. having (count(*) mod n=0 )
c) both a& b
d) none of the above

4. type duplicates of a row in a table customer with non uniform key field customer no. you can see

a) delete from customer where customer no. exists ( select distinct customer no. from customer having count )
b) delete customer a where customer no. in (select customer b where customer no. equal to b customer no. ) and a rowid > b rowid
c) delete customer a where customer no. in ( select customer no. from customer a, customer b )
d) none of the above

5.6*12*15 is the volume of some material. How many cubes can be inserted into that?


6.Two pipes can fill a tank in 10 1nd 12 hours while third pipe will make the tank empty in 20 hours. If all three pipes operate simultaneously, in how many hours the tank will be filled ? 

Ans.7hours 30 minutes.

7.Diameter of a beaker is 7cm. Mambler(some instrument) dia is 1.4cm. How many mamblers has to be put to increase the water level by 5.6cm.

8.Cost of an item is x. It's value increases by p% and decreases by p% Now the new value is 1 rupee, what is the actual value.


9.A right circular cylinder and a cone are there. Base radius of cone is equal to radius of cylinder. What is the ratio of height to slant side.

10.Distance between two poles is 50 meters. A train goes by 48 kmph in one minute. How many poles will be crossed by the train.

11.A pole seen from a certain distance at an angle of 15 degrees and 100 meters ahead by 30 degrees. What is the height of pole.

12.15 people--each has to pay Rs.20.. 20 people--each has to pay Rs.18.. for 40 people--how much has to pay ?

13.if p=2q then q=r*r, if p-odd then q is even, whether we decide r is even or odd ? 

a) first condition is sufficient
b) second condition is sufficient
c) both are sufficient
d) both are not sufficient

14.What is the value of m given that

i) m is divided by 2
ii) m is divided by 5
Ans: none of these

15.If he sells 40 mangoes, he will get the selling price of 4 mangoes extra, What is his % increase in profit ?

Ans: 25%