Common Interview Questions for Coding Interviews

Preparing for coding interviews can be overwhelming, especially when deciding which questions to revise. Here’s a curated list of 35 essential questions covering key topics like Arrays, Strings, Trees, Graphs, and Dynamic Programming to help you focus your revision.

Arrays

1. Two Sum – https://lnkd.in/dWDJFCrk
2. Best Time to Buy and Sell Stock – https://lnkd.in/dbfXdHcc
3. Maximum Subarray – https://lnkd.in/dA3e79e7
4. Container with Most Water – https://lnkd.in/derBVWA2
5. Rotate Array – https://lnkd.in/d3iAd_ye

Strings

1. Reverse String – https://lnkd.in/dSYxrHkt
2. Valid Palindrome – https://lnkd.in/dNTpQFit
3. Longest Substring Without Repeating Characters – https://lnkd.in/dMYzuAY4
4. Group Anagrams – https://lnkd.in/dZAMtWYM
5. Longest Palindromic Substring – https://lnkd.in/dnk7bi7m

Linked List

1. Reverse Linked List – https://lnkd.in/drbzn2b6
2. Merge Two Sorted Lists – https://lnkd.in/d7dPE39P
3. Remove Nth Node From End of List – https://lnkd.in/dhwSrxbu
4. Linked List Cycle – https://lnkd.in/dvymdefx
5. Intersection of Two Linked Lists – https://lnkd.in/dfJKZ2dZ

Trees

1. Maximum Depth of Binary Tree – https://lnkd.in/dCMEXszH
2. Validate Binary Search Tree – https://lnkd.in/dZVA-vNR
3. Symmetric Tree – https://lnkd.in/ddx6A8Zw
4. Binary Tree Level Order Traversal – https://lnkd.in/diR5nX4U
5. Lowest Common Ancestor of a Binary Tree – https://lnkd.in/dFkJwkaV

Graphs

1. Number of Islands – https://lnkd.in/drj5P3bf
2. Course Schedule – https://lnkd.in/duvfs54r
3. Word Ladder – https://lnkd.in/dmTspiu3
4. Clone Graph – https://lnkd.in/dXYJsBMY
5. Network Delay Time – https://lnkd.in/d3WVx_JP

Searching & Sorting

1. Merge Sort – https://lnkd.in/d5TVqNCE
2. Quick Sort – https://lnkd.in/d5TVqNCE
3. Binary Search – https://lnkd.in/dQNu5M-V
4. Search in Rotated Sorted Array – https://lnkd.in/dWMGpD4e
5. First Bad Version – https://lnkd.in/dBpRdqwt

Dynamic Programming

1. Fibonacci Number – https://lnkd.in/dJqY369E
2. Climbing Stairs – https://lnkd.in/dK8UxFsq
3. Longest Increasing Subsequence – https://lnkd.in/dSkJXnDp
4. Maximum Subarray Sum – https://lnkd.in/dA3e79e7
5. Coin Change – https://lnkd.in/d-ByK5Fx

You Should Know:

Here are some essential Linux and Windows commands to help you in technical interviews:

Linux Commands for Coding & Debugging

– `grep -r “pattern” /path/` – Recursively search for a pattern in files.
– `strace -e trace=open,read,write ./program` – Trace system calls.
– `valgrind –leak-check=yes ./program` – Detect memory leaks.
– `gdb -tui ./executable` – Debug with a text-based interface.
– `time ./program` – Measure execution time.

Windows Commands for Developers

– `tasklist | findstr “process_name”` – Find a running process.
– `wmic process get name,processid` – List all processes with IDs.
– `chkdsk /f` – Check and repair disk errors.
– `sfc /scannow` – Scan and repair system files.
– `netstat -ano` – Display active network connections.

What Undercode Say:

Mastering these coding questions and understanding debugging tools will significantly boost your interview performance. Combine theoretical knowledge with hands-on practice using Linux/Windows commands to troubleshoot efficiently.

Expected Output:

A structured revision plan with direct links to coding problems and essential debugging commands for technical interviews.

References:

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