Round 1: Q1:- Find peak element in 2D matrix Q2:- Follow-up :- modification of https://leetcode.com/problems/word-ladder/description/ The dictionary had all primes from 1000 to 9999 and in one operation one can change one digit (A->B) but both should still be primes , and then tell how can you reach from startNum to endNum Q3:- Project Discussion Q4:- what did you do in Internship Project

Round 2: Q1:- LLD – Design Chat App

Design a simplified version of a social media app called Chatter where users can:

Post updates.

Follow or unfollow other users.

Mute users (hide their posts without unfollowing).

Soft-delete updates (hide from feeds but keep for audit).

See their home feed with pagination (excluding muted or deleted updates).

Implement the Chatter class with the following methods:

Chatter() — Initializes the app.

void postUpdate(int userId, int updateId) — Posts a new update by userId.

List<Integer> getHomeFeed(int userId, String cursor, int limit) — Returns up to limit most recent visible update IDs from the user and followed users, newest first, excluding muted/deleted updates. Supports cursor-based pagination.

void follow(int followerId, int followeeId) — Follow another user.

void unfollow(int followerId, int followeeId) — Unfollow another user.