10+ TikTok Interview Questions and Answers

The underlying database of MySQL is InnoDB.

• InnoDB is the default storage engine for MySQL.

• It provides ACID-compliant transactions.

• Supports foreign keys for referential integrity.

• InnoDB is designed for high performance and scalability.

Computers connect with each other using IP/TCP through a series of protocols and addressing schemes.

• IP (Internet Protocol) assigns a unique address to each device on a network.

• TCP (Transmission Control Protocol) manages the transmission of data between devices.

• Devices communicate by sending packets of data over the network using IP addresses and port numbers.

• Routers and switches help route the packets to their destination based on the IP address.

• TCP ensures reliable delivery ...read more

Design a search algorithm to find the top k elements in a dataset.

• Use a priority queue to efficiently retrieve the top k elements.

• Implement a max heap to keep track of the top k elements.

• Consider using quickselect algorithm for optimal performance.

• Optimize the search algorithm for time complexity O(n log k).

Tiny URL design involves creating a shorter version of a long URL for easier sharing and tracking.

• Use a hashing algorithm to generate a unique short code for each long URL

• Store the mapping of short code to long URL in a database

• Redirect users from short URL to original URL when accessed

Find array elements that sum to a target value

• Use a nested loop to iterate through all possible pairs of elements

• Check if the sum of the pair equals the target value

• Return the pair if found, otherwise return an empty array

I track metrics such as time to fill, cost per hire, quality of hire, and candidate satisfaction.

• Time to fill - measures how long it takes to fill a job opening

• Cost per hire - calculates the total cost of hiring divided by the number of hires

• Quality of hire - assesses the performance and retention of new hires

• Candidate satisfaction - gathers feedback from candidates about their experience

I use a variety of sourcing tools including LinkedIn Recruiter, Indeed, and niche job boards.

• LinkedIn Recruiter

• Indeed

• Niche job boards

Word search II is a problem where you have to find all words from a given list in a 2D board of characters.

• Use a trie data structure to efficiently search for words in the board.

• Implement a backtracking algorithm to explore all possible paths in the board.

• Optimize the search by pruning branches that cannot lead to a valid word.

LLMs are Large Language Models used in natural language processing tasks.

• LLMs are advanced models that can generate human-like text based on input data.

• They are typically trained on large amounts of text data to learn patterns and relationships.

• Examples of LLMs include GPT-3 (Generative Pre-trained Transformer 3) and BERT (Bidirectional Encoder Representations from Transformers).