What are some common algorithm interview questions?

What are some common algorithm interview questions I should prepare for?

Some common algorithm interview questions include:

1. How would you find the longest substring without repeating characters?
2. Can you explain the difference between depth-first search and breadth-first search?
3. How do you detect a cycle in a linked list?

Can you explain how to solve the longest substring problem?

Sure! To solve the longest substring without repeating characters, you can use a sliding window approach. Start with two pointers and a set to track characters. Expand the window by moving the right pointer and check for duplicates. If a duplicate is found, move the left pointer to shrink the window until there are no duplicates.

What about the cycle detection in a linked list?

For cycle detection in a linked list, you can use Floyd's Tortoise and Hare algorithm. Use two pointers: one moves one step at a time (tortoise) and the other moves two steps at a time (hare). If there's a cycle, they will eventually meet; if not, the hare will reach the end of the list.

Thanks! Any tips for preparing for these interviews?

Practice coding problems on platforms like LeetCode or HackerRank, and review data structures and algorithms regularly. Mock interviews can also help!