The answer
Yes. Many companies ask about the Event Loop, Call Stack, concurrency, Streams, Buffers, and asynchronous execution.
What Level of Node.js Is Required for Backend Jobs?
Do backend interviews ask Node.js internals?
More FAQs in What Level of Node.js Is Required for Backend Jobs?
Most junior roles require Node.js fundamentals, Express.js, REST APIs, databases, authentication, and basic deployment knowledge.
Express.js is important, but many companies also expect knowledge of async programming, databases, authentication, security, and Node.js internals.
Databases are extremely important because backend developers are responsible for storing, retrieving, and managing application data efficiently.
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