Round 1 -

Q1 - Find if a number is palindrome. Not allowed to use any string operations.
Q2 - For a given tree, find the sum of numbers formed by the node values. Eg

			2
		/    \
	3         1
/    \       / \
4    1    2    5

Expected output - 234 + 231 + 212 + 215 = 892

Cleared this round. Got an invite for the next round.

Round 2 -

Reverse a doubly linked list in groups of k, similar to this question.

https://leetcode.com/problems/reverse-nodes-in-k-group/

Could not solve this :(