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Chapter 12: Common Coding Mistakes in Interviews
Last Updated: March 30, 2026
Ashish Pratap Singh
8 min read
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Chapter 12: Common Coding Mistakes in Interviews...
Off-by-One Errors
Forgetting Base Cases in Recursion
Modifying a Collection While Iterating
Integer Overflow
Not Handling Null
Using == Instead of .equals() for Objects
Infinite Loops from Wrong Updates
Forgetting to Update Pointers in Linked Lists
Wrong Variable Scope
Returning the Wrong Type or Value
Common Mistakes Quick Reference
A Debugging Mindset for Interviews
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