Vention | Tech Call

After successfull call with recruiter, i was invited to have a 15-20 minute tech call. This was a resume check interview with Team Lead. Below i share some questions:

• What is S.O.L.I.D?
• Have you assigned task related to database optimization?
• What is the best candidate for indexing?
• Have you used EXPLAIN keyword in PostgreSQL?
• What is the difference between SQL and NoSQL?
• Can we create instance with private constructor?
• What is the difference between Runnable and Callable?