FAANG / Big Tech interview question · Most asked
How do you find the longest substring without repeating characters?
Summary
Sliding window with a map of last indices; expand right, shrink left on duplicates; track max length.
Longer Answer
Sliding window with a map of last indices; expand right, shrink left on duplicates; track max length. Classic sliding window.
Key Points
- Sliding window with a map of last indices; expand right, shrink left on duplicates; track max length
- Classic sliding window
- Relevant areas: Dsa, Strings
- Use the answer to connect the concept back to a realistic production or interview scenario for 'How do you find the longest substring without repeating characters?'
Comparison / Tradeoffs
| Aspect | Notes |
|---|---|
| Core idea | Sliding window with a map of last indices; expand right, shrink left on duplicates; track max length. |
| Practical tradeoff | Classic sliding window. |
Explanation
Summary
Classic sliding window.
Longer Answer
Classic sliding window. Focus on the practical implications across Dsa, Strings.
Key Points
- Classic sliding window
- Focus on the practical implications across Dsa, Strings
- Relevant areas: Dsa, Strings
- Use the answer to connect the concept back to a realistic production or interview scenario for 'How do you find the longest substring without repeating characters?'
Comparison / Tradeoffs
| Aspect | Notes |
|---|---|
| Core idea | Classic sliding window. |
| Practical tradeoff | In an interview, relate 'How do you find the longest substring without repeating characters?' to implementation decisions, tradeoffs, and operational impact. |
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