Walmart Labs | SSE - Big data| | July | Reject

Experience: 8 years

Round 1:

1. DP based Leetcode Easy/Medium Problem. Similar to Frog Jump.
2. Question about Double Checked Locking in a Singleton class
3. SOLID principles
4. Design patterns - Factory, Singleton, Decorator etc

Round 2:

1. Bloom Filters
2. Hadoop Speculative execution
3. Kafka Internals - ISR, Message Delivery Guarantees, Consistencies
4. ArrayList Based Question - What happens when an element is deleted?
5. Few more Java based questions

Round 3:

1. Discussion about work/projects in current organization
2. Kerberos Authentication
3. Hadoop based questions
4. Role of Zookeeper in Kafka. Can Kafka function without Zookeeper?
5. Multithreaded Program - 1 thread prints even numbers and another thread prints odd numbers. Output should be numbers in consecutive order