Coding Index

Coding round: 2 questions / 30 minutes.

The highest ROI is arrays, strings, and number logic.

Notes

• [[Coding_Strategy]]
• [[Edge_Cases_Checklist]]
• [[C++_Templates]]
• [[Python_Templates]]
• [[Arrays_Problems]]
• [[Strings_Problems]]
• [[Number_Logic_Problems]]
• [[Coding_PYQ_Style_Set]]

What to practice first

1. Largest/smallest/second largest in array
2. Frequency count
3. Reverse array/string
4. Palindrome
5. Prime number
6. Fibonacci
7. GCD/LCM
8. Sum/reverse digits
9. Anagram
10. Pair sum

Score strategy

One fully accepted question is better than two broken solutions.

Attempt order:

1. Read both problems.
2. Solve easier one first.
3. Test with custom inputs.
4. Then attempt second.

Common mistake patterns

• Not handling duplicates
• Integer division errors
• Wrong loop boundary
• No input reading for all test cases
• Printing extra spaces/newlines
• Confusing character and integer
• Not handling n = 0 or n = 1