Zoom Meeting | SDE-2 | Remote

Applied through career page. Received email from recuriter after 3 days for online assesment.
Round 1: Online Assesment:
10 MCQ
2 Question for code review
1 Coding question
Arrange all the even numbers on left and all the odd numbers on right side of array.

Round 2: Coding intervew
Level: Easy

Interviewer asked 5 questions:

1. Create custom hashmap
2. Ceaser Cipher
   2.1) Write code to encrypt/ decrypt lowercase englsh characters.
   2.2) Modify existing method to accept uppercase and lowercase english characters. All other characters should remain same.
3. Valid parenthises
4. Factory pattern
5. Singelton class without using synchronized

Round 3: System Design
Level: Hard
HLD question: Design a scalable, fault-tolerant system for a social media platform that can handle millions of users concurrently. Consider the architecture, data storage, load balancing, and security aspects of the system.