Off-campus referral, backend role: DynamoDB internals + DSA, then heavy system design (image upload), then culture fit

Off campus opportunity
Applied via referal
SDE 1 role - Backend

Round 1:

• Tell me something about urself. [5 minutes ]
• Discussion about internship and follow ups. How would you scale the work you did during internship. Discussion around internal working of DynamoDB and follow ups [40 minutes ]
• DSA question : brute to optimised [10 minutes ]
  Similar to : https://leetcode.com/problems/kth-largest-element-in-an-array/

Round 2:

• Interviewer gave his intro and told about his work, and asked questions on that. How would you approach/ what is benefit of doing this/ Why we should do this/ How would we take care of this situation type question related to Zomato. [ 35 minutes ]
• My intro [ 2 minutes]
• System design question - Design an image upload system [45 minutes]
• what protocol will you use?
• Write code for CRUD Api's
• Status code, request payload , response payload , headers, authentication applications
• SQL query related to above system ( related to joins)
• Optimise query
• indexing ( implementation and applications)

Round 3

• Cultural fit round at Zomato HQ Gurgaon [30 minutes]
• Normal discussion, why do you want to join zomato, your expectations

Verdict : SELECTED

Note: Both technical rounds happened on Google doc
Focus on DSA Leetcode (Medium - Hard ) , DBMS and System design
They did not asked me much DSA, but they deep dived into System design in both rounds.
Hope for best, prepare for worst.

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