I applied through an employee referral. The process took 1 week. I interviewed at PayPal (Bengaluru) in Apr 2022
Interview
Easy, comfortable, good process. Was completed in one day. Getting an interview took a while though. They get a lot of applicants. They have good interviewers, patient, in-depth questions asked.
Interview questions [1]
Question 1
1. Array reverse, Expression tree and Binary tree. Simple In-Memory cache.
2. Merge 2 sorted arrays into a single one. Find duplicates no. in an array of natural no.
3. Function to return true if array contains three elements whose sum is X
4. When do you use HashMap vs TreeMap vs LinkedHashMap?
5. ArrayList vs LinkedList. How HashMap works internally.
6. Reverse a stack using just push and pop no extra space.
7. Design LLD for Instagram/ photo-sharing app, Design A Cron Job scheduler.
8. Design HLD for Twitter system/ automated parking lot to minimize the entry and exit times.
