Answer / pp

SNAPDEAL QUESTIONS


1. A train is going at a speed of 60kmph towards Delhi
and returned back at a speed of 30kmph. What is its average
speed?
ANS : (2*30*60)/(30+60) = 40kmph
2. How many different 4 letter words can be framed that
have at least one vowel?
ANS : 264 - 214 (total no of 4 digits words – no of words
with no vowels)
3. Write an algorithm to find out a number from an
array of numbers where only one number occurs once and rest
all occurs twice.
ANS : XOR all the numbers ,you will get the number with
single occurrences .
4. Which among the following have the product of the
distance between opposite sides of a regular polygon and it
side equals one fourth of the area.
A. hexagon
B. octagon
C. n=16
D. n=18
ANS : n=16.(area of regular polygon = apothem*perimeter/2
Apothem = distance between opposite
sides/2
Area = (opp_side_dist * n * a )/4
Product of opp_side_dist and side of reg. polygon =
opp_side_dist * a
For n= 16 the ration becomes 1:4
5. Which of the following cannot be a relation between two
variables?







ANS = 4th diagram.

6.what will be the output of this program

Void print (int n)
{
If (n>0)
{
printf(“hello”);
print(n-1);
}
printf(“world”);
}
ANS : N times hello followed by N+1 times world.

7. Which among the following cannot be used for future
prediction?










ANS : 4th Diagram.

8. There are 25 horses. We have to find out the fastest 3
horses In one race maximum 5 horses can run. How many such
races are required in minimum to get the result.
ANS : 7 races (A. first run all horses = 5 races, eliminate
4th 5th of all races.
B. Run horses who came 1st in those
5 races = 1 race , the horse coming first is the fastest
Run horses
a. 2nd and 3rd with the fastest horse (in first time
race A)
b. 2nd and 3rd coming horse in B.
c. The horse who came 2nd with the horse(who came 2nd
in race B) in race A
You will have the fastest 3 horses.)


9. In a game of rolling dice you are given 2 dice and you
have to roll them. Whatever is the outcome the player will
win that many dollars. What should the game owner charge
each player (optimum) so that he doesn’t have to bear any
loss?
ANS : $7

10. We have a function REV(“string”,m,n).This function is
capable of reversing the caharacters in the string from mth
location to nth location.
e.g. REV(“abcd”,2,3)  the output will be acbd
We need to swap a string from a position,e.g.
SWAP(“abcdefg”,4)  output needs to be
efgabcd.
How can the REV function used do this.

ANS : L = string length,N= position given in SWAP function.
SWAP(“abcdefg”,4) = REV(REV(REV(“abcdefg”,N+1,L),1,N),1,L).

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