Lenditt Interview Questions, Process, and Tips

Q1. Explain Event loop in node.js
Ans. 
Event loop is the core of Node.js runtime that handles asynchronous operations and ensures non-blocking I/O.
• Event loop is responsible for executing callbacks and handling I/O operations.

• It allows Node.js to handle multiple requests concurrently.

• Event loop uses an event-driven architecture to efficiently manage resources.

• Callbacks are added to different queues based on their type and priority.

• Event loop continuously che...read more
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Q2. Is Node.js Single threaded or Multi threaded?
Ans. 
Node.js is single threaded, but it can support concurrency through event loop and non-blocking I/O operations.
• Node.js runs on a single thread and uses an event-driven, non-blocking I/O model.

• It can handle multiple requests concurrently by leveraging the event loop.

• Node.js uses callbacks or promises to handle asynchronous operations.

• The event loop allows Node.js to efficiently handle I/O operations without blocking the ...read more
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Q3. How can we make use of multiple threads with node.js
Ans. 
Node.js is single-threaded, but we can utilize multiple threads using worker threads module.
• Node.js is designed to be single-threaded for better performance and scalability.

• However, we can make use of the worker threads module to run JavaScript code in separate threads.

• Worker threads allow us to perform CPU-intensive tasks without blocking the event loop.

• We can create new worker threads using the Worker class from the ...read more
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Q4. Difference between find and filter method in js
Ans. 
find method returns the first element that satisfies the condition, while filter method returns all elements that satisfy the condition.
• find method returns the first element that satisfies the condition

• filter method returns all elements that satisfy the condition

• find method stops iterating once it finds a match

• filter method iterates through the entire array

• find method returns undefined if no element satisfies the condi...read more
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It was a phonebook project.
Where each user will have a phonebook,
And user's contact should be encrypted before stored and it should be unique.