Are you aiming for a FAANG company or want to crack your first tech interview? Data structures are the backbone of coding interviews. This subject shows your problem-solving, logic, and optimization ...

If you are just joining or still wrapping your head around time complexity, start with my first post on Big-O Notation. It explains how we think about performance and why it matters when writing ...

I invested 6+ hours to create this cheatsheet of 53 DSA problem-solving patterns & 265 problems of the 6 most commonly asked important data structures in interviews. (Problems are at the end) 1.

Big O - upper bound Big Omega - lower bound Big Theta - upper and lower bound - that's what's usually used but called Big O. An ArrayList is implemented with an array. When the array hits capacity, ...

BFS is an abbreviation for Breadth First Search. Breadth First Search is a traversal technique which implements queue data structure that follows FIFO (First In First Out) rule. One of the common ...