10 October 2015



The test predominantly consists of algorithm questions and a lot of questions on trees.

Some questions are:

C test:

Q1) linked list using recursion.
Q2) Find if a number is divisible my 3, without using %,/ or *. You can use atoi().
Q3) 2 integers A and B are given, find the no of bits that need to be flipped in A to get B. ( X-OR a and b and count the number of bits)
Q4)  Write a Rotate function for rotating elements in an array, using a reverse function.
Q5)  Given 2 sorted arrays A and B with duplicate elements, get C= A -B and does not have duplicates (use a variation of merging 2 arrays and then remove the duplicates.)
Q6) Some routines to swap int pointers.
Q7)  Subtraction of 2 base 13 numbers.
Q8) Min and max nodes of a quad tree.
Q9) Prove that in a tree no of internal nodes is one less than leaves.
Q10) A couple of Boolean logic proofs
Q11) Code to see if a binary tree is a BST or not.
Q12) Switch case program out put

Engineering test:

Most of it had algorithms( no code)
Q1) Given an array with some repeating numbers. Like 12,6,5,12,6
output:  12,12,6,6,5     12 should come before 6 since it is earlier in list. So cant use a dictionary.

Q2) Implement a dictionary manually with a littel overhead.
Q3)finding nth element from end in a list
Q4)inserting an element into a sorted linked list.

In the another part many questions were based on the rule that square root of 25 is +5/-5. Not just 5. Similarly for 1.
Geometry the questions were a littel bit tricky, but they are few that u can ignore them.

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