10 Common Coding Interview Mistakes
After conducting 100+ interviews, here are the most common mistakes I see candidates make.
1. Not Clarifying Requirements
Always ask clarifying questions before coding.
2. Jumping to Code Too Quickly
Think through your approach first.
3. Silent Coding
Communicate your thought process.
4. Ignoring Edge Cases
Consider empty inputs, single elements, duplicates.
5. Not Testing Your Code
Walk through examples before submitting.
6. Poor Variable Naming
Use descriptive names, not i, j, k everywhere.
7. Forgetting Time/Space Complexity
Always analyze and optimize.
8. Not Handling Follow-ups
Be prepared for "what if" questions.
9. Giving Up Too Easily
Show problem-solving persistence.
10. Poor Communication
Practice explaining your thinking clearly.
How to Improve
- Do mock interviews
- Record yourself coding
- Get feedback from experienced engineers
Avoid these mistakes and your interview performance will improve dramatically!