Meta Interview Questions and Answers

Develop a user-centric search product by analyzing needs, defining features, and iterating based on feedback.

• Conduct user research to understand search behavior and preferences, e.g., surveys or interviews with potential users.

• Define key features such as personalized results, filters, and advanced search options based on user needs.

• Create wireframes and prototypes to visualize the product and gather early feedback...read more

Find the Kth largest element in an unsorted array using various methods.

• Use a max-heap to extract the largest elements until reaching K. Example: For [3, 2, 1, 5, 6, 4] and K=2, result is 5.

• Sort the array in descending order and return the K-1 index. Example: For [3, 2, 1, 5, 6, 4] and K=2, sorted array is [6, 5, 4, 3, 2, 1].

• Use Quickselect algorithm for average O(n) time complexity. Example: For [3, 2, 1, 5, 6, 4...read more

Implement an LRU (Least Recently Used) cache to efficiently store and retrieve data with limited capacity.

• Use a hash map for O(1) access to cache items.

• Use a doubly linked list to maintain the order of usage.

• When adding a new item, check if it exceeds capacity; if so, remove the least recently used item.

• Example: If cache capacity is 2, adding (1,1) and (2,2) then (3,3) removes (1,1).

• Implement 'get' and 'put' metho...read more

Find the longest palindromic subsequence from a string, ensuring lexicographical order for ties.

• A palindrome reads the same forwards and backwards, e.g., 'racecar'.

• Use dynamic programming to find the longest palindromic subsequence.

• Example: For 'abcbda', the longest palindromic subsequence is 'aba'.

• If multiple longest palindromes exist, return the lexicographically smallest one, e.g., 'aa' from 'aabbaa'.

Effective problem-solving involves identifying issues, analyzing options, and implementing solutions systematically.

• Define the problem clearly: Understand what the issue is and its impact.

• Gather relevant information: Collect data and insights related to the problem.

• Analyze potential solutions: Evaluate different approaches and their feasibility.

• Implement the chosen solution: Execute the plan while monitoring progr...read more

A valid palindrome reads the same forwards and backwards, ignoring spaces, punctuation, and case.

• Consider only alphanumeric characters: 'A man, a plan, a canal: Panama' is a valid palindrome.

• Ignore case sensitivity: 'Racecar' is the same as 'racecar'.

• Use two-pointer technique: Compare characters from start and end moving towards the center.

Your company is a leading provider of innovative IT solutions, focusing on enhancing business efficiency and customer satisfaction.

• Founded in 2005, the company has grown to serve over 500 clients globally.

• Specializes in cloud computing, cybersecurity, and data analytics.

• Recent projects include a successful migration to cloud services for a major retail client, improving their operational efficiency by 30%.

• Committe...read more

I worked on a modular architecture for a renewable energy system, enhancing efficiency and scalability.

• Designed a modular solar panel system that can be easily expanded based on energy needs.

• Implemented a centralized control unit for monitoring and optimizing energy output.

• Utilized CAD software for precise modeling and simulation of the energy system.

• Collaborated with cross-functional teams to ensure integration w...read more