Bluestock ™ Backend Developer Interview Questions and Answers

Q1. Number of Islands leetcode
Ans. 
Count the number of islands in a 2D grid of '1's and '0's.
• Iterate through the grid and for each '1' encountered, perform a depth-first search to mark all connected '1's as visited.

• Increment the island count for each unvisited '1' encountered during the iteration.

• Example: Input grid = [['1','1','0','0'],['1','1','0','0'],['0','0','1','0'],['0','0','0','1']], Output = 3
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Q2. SQL queries based on group by
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Q3. Resume questions
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Hackerearth Coding Test

Q1. Technical Round with Senior Software Engineer around Java, DSA and APIs
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Q2. 1. Check Valid Parenthesis, 2. Given a problem design your own API and suitable URL for it Discussions about implementation and designing of the above two questions
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Q1. One-on-one round with Project manager
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Q2. Architecture and System design round, but interviewer given me Java Coding , some basic question and asked some questions on SQL then in the middle of the interview he told that we are not going forward wi...read more
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