Absolute Must Have

Below are must have topics that you must know:

Algorithms Data Structures Concepts
Breadth First Search (BFS) Linked Lists Bit Manipulation
Depth First Search (DFS) Binary Trees Single Design Pattern
Binary Search Tries Factory Design pattern
Merge Sort Stacks Memory (Heap, Stack)
Quick Sort Queues Recursion
Trees Insert, find, delete etc ArrayList, Vectors Complexity, Big-O Notation
Hash Table

Table of Power of 2

This table will be helpful in remembering the units, specially in scalability interviews.

Power off 2 Value Value Name MB, GB,...
6 64
7 128
8 256
10 1024 One Thousand 1 KB
16 65,536 64 KB
20 1048,536 1 million 1 MB
30 1073,741,824 1 billion 1 GB
32 4294,967,296 4 GB
40 1099,511,627,776 1 trillion 1 TB