Company: Cognizant Technology Solutions

The Naughty `C’
For Novice and Intermediate C Programmers
To get the answer highlight the answer line ( It may not be there )

Find MAXIMUM of three distinct integers using a single C statement
Ans : d= (a>b) ? ((a>c) ? a : c)) : ((b>c) ? b : c ))

Swap two variables without using any extra variable
Ans : a=a+b;b=a-b;a=a-b;

Construct a doubly linked list using a single pointer in each node
Ans :
int i=0; while(i=0) printf(“%d”,++i); Guess the output
Ans : The Loop is not executed, since the assignment statement returns the assigned value zero which is equivalent to false in C
int i=0; while(i=1) printf(“%d”,++i); Guess the output
Ans : The Loop is executed forever always printing 2, since the assignment statement returns the assigned value one which is equivalent to true in C
int x=2, y=6, z=6; x=y==z; printf(“%d”,x); Guess the output
Ans : The == has higher precedance than

COGNIZENT PAPER 2nd

1.
A says ” the horse is not black”.

B says ” the horse is either brown or grey.”

C says ” the hoese is brown”

At least one is telling truth and atleast one is lying. tell the colour of horse?

2.
A son and father goes for boating in river upstream . After rowing for 1 mile son notices the hat of his fathe falling in the river.After 5 min. he tells his father that his hat has fallen. So they turn round and are able to pick the hat at the point from where they began boating after 5min.

Tell the speed of river?

Ans…6 miles/hr

3.
A+B+C+D=D+E+F+G=G+H+I=17 where each letter represent a number from 1 to 9. Find out what does letter D and G represent if letter A=4. (8 marks)

Ans. D=5 G=1

4.

Argentina had football team of 22 player of which captain is from Brazilian team and goalki from European team. For remainig palayer they have picked 6 from argentinan and 14 from european. Now for a team of 11 they must have goalki and captain so out of 9 now they plan to select 3 from rgentinian and 6 from European. Find out no. of methods
avilable for it. (2 marks)

Ans : 160600( check out for right no. 6C3 * 14C6)

5.
Three thives were caught stealing sheep, mule and camel.

A says ” B had stolen sheep ”

C says ” B had stolen mule”

B says he had stolen nothing.

The one who had stolen horse is speaking truth. the one who had stolen camel is lying . Tell who had stolen what? (5 marks)

Ans. A- camel ;B- mule ;C- horse

6.
A group of friends goes for dinner and gets bill of Rs 2400 . Two of them says that they have forgotten their purse so remaining make an extra contribution of Rs 100 to pay up the bill. Tell the no. of person in that group. (3 marks)

Ans – 8 person

7.
In acolony there are some families. Each of them have children but different in numbers.Following are conditions:

A) No of adult no of sons no of daughters no of families.

B) Each sister must have atleast one brother and should have at the most 1 sister.

C) No of children in one family exceeds the sum of no of children in the rest families.

Tell the no of families.(5 marks)

Ans : 3 families

8.
There are 6 people W,H,M,C,G,F who are murderer , victim , judge , police, witness, hangman. There was no eye witness only circumtancial witness. The murderer was sentenced to death.
Read following statement and determine who is who.

1. M knew both murderer and victim.
2. Judge asked C to discribe murder incident.
3. W was last to see F alive.
4. Police found G at the murder site.
5 H and W never met.
( 8 marks)

The above mentioned questions are of 37 marks rest I don’t rememberas they had no of condition. One which mentions about hundustani music Gazals ect. is tobe solved through venn diagram. Its of 8
marks. and another was grading 5 student which was of 5 marks.