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10+ TikTok Interview Questions and Answers

Updated 5 Nov 2024

Q1. What is the underlying database of mysql?

Ans.

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.

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Q2. How does computer connect with each other IP/TCP?

Ans.

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

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Q3. CTR looks weak, what are the thingsyou looking for to fix that?

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Q4. Design search for top k

Ans.

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).

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Q5. How would you structure a performance campaign for this client?

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Q6. What are the metrics to judge a successful Lead campaign?

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Q7. Tiny url design

Ans.

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

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Q8. 3 SUM, return array elements which sum to a target

Ans.

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

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Q9. How can you implement a HashMap

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Q10. What metrics do you track

Ans.

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

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Q11. What sourcing tools you use

Ans.

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

  • LinkedIn Recruiter

  • Indeed

  • Niche job boards

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Q12. Word search II from leetcode

Ans.

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.

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Q13. What are LLM's,

Ans.

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).

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Q14. Design an alerting and monitoring system

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Q15. Design whatsapp

Ans.

Design a messaging app similar to WhatsApp

  • Include features like text messaging, voice messaging, video calling, group chats, and file sharing

  • Implement end-to-end encryption for user privacy and security

  • Allow users to set status updates and profile pictures

  • Provide options for users to customize chat backgrounds and notification settings

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