Hike Interview Questions, Process, and Tips

Usage history of an application can be analyzed by tracking user actions and behavior.

• Collect data on user interactions with the application

• Analyze the frequency and duration of usage

• Identify patterns and trends in user behavior

• Use data visualization tools to present findings

• Consider user feedback and reviews for additional insights

Reverse alternate levels of a binary tree

• Traverse the tree level by level

• Reverse the nodes of alternate levels

• Use a queue or stack to keep track of nodes at each level

• Recursively apply the same process to the children of reversed nodes

Design a thread-safe LRU cache that can be scaled.

• Use a ConcurrentHashMap to ensure thread safety.

• Implement a doubly linked list to keep track of the least recently used items.

• Use a HashMap to store the cache items for fast retrieval.

• Implement a size limit for the cache and remove the least recently used item when the limit is reached.

• To scale the cache, use a distributed cache like Redis or Memcached.

Design a file sharing mechanism between two users

• Use a secure protocol like HTTPS or SFTP

• Implement access control to ensure only authorized users can access the files

• Consider implementing encryption to protect the files during transit and at rest

• Provide a user-friendly interface for uploading and downloading files

• Implement version control to track changes made to the files

• Consider implementing a notification system to