L1 Support Interview Questions

736 l1 support interview questions shared by candidates

Server Topics:- 1)what are server model you know ? 2)how get a remote access for a server? 3)what you client raised a ticket about my server not working! when i try to connect using ssh/remote desktop? Networking Topics:- 1)What Nat Protocol do? 2)what are the process will happen in background when you configured 3)DHCP on router ! me in my mobile i tried to connect on the router? 4)protocol port numbers for(DNS,SSH,SMTP,IMAP,POP)
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L1 Server Engineer

Interviewed at Photon

4.3
Jul 10, 2025

Server Topics:- 1)what are server model you know ? 2)how get a remote access for a server? 3)what you client raised a ticket about my server not working! when i try to connect using ssh/remote desktop? Networking Topics:- 1)What Nat Protocol do? 2)what are the process will happen in background when you configured 3)DHCP on router ! me in my mobile i tried to connect on the router? 4)protocol port numbers for(DNS,SSH,SMTP,IMAP,POP)

1) You are given an array of 1's and 0's. You need to segregate all 0's at one end and 1's at the another end. The time complexity should be O(n), Space Complexity O(1), In-Place Algorithm and Stable Algorithm. 2) Write a code for Level-Order Zig Zag Traversal of tree. 3) OOP Concepts 4) Commands from linux (grep,top,find etc.) 5) 7 SQL queries (Majorly Joins)
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Software Engineer L1

Interviewed at Gemini Solutions

3.5
Mar 19, 2019

1) You are given an array of 1's and 0's. You need to segregate all 0's at one end and 1's at the another end. The time complexity should be O(n), Space Complexity O(1), In-Place Algorithm and Stable Algorithm. 2) Write a code for Level-Order Zig Zag Traversal of tree. 3) OOP Concepts 4) Commands from linux (grep,top,find etc.) 5) 7 SQL queries (Majorly Joins)

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