Technologies Coding Problems Bookmarks Learning Paths

Technologies Coding Problems Bookmarks Learning Paths

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Questions

6 of 9

1What are advantages of Node.js Being Single-Threaded?

2Discuss Exec method.

3Node js is single-threaded or multithreaded?

4Discuss Spawn() method.

5Why is node js single-threaded?

6What is process management?

7Describe fork, spawn and exec.

8How can we simulate multi-threading in node js?

9Discuss fork() method.

nodejs

File Operations

Performance Optimisation

06 / 09

What is process management?

Difficulty: 5/10

child_process, cluster, process monitoring

In a server-side application, multiple processes can be running simultaneously, each of which has its own memory space and runtime environment. Process management refers to the ways in which these processes are created, managed, and terminated.

There are three primary ways to create a child process in Node.js:

1
exec.
2
fork.
3
spawn.

Scenario Questions

0-2 years experience

1How would you spawn a child process in Node.js to run a shell command, and how would you capture its output?
2If a child process you started exits with a non‑zero code, what steps would you take in your Node.js code to handle it?
3What happens if you forget to call child.unref() on a detached process?

Follow-up Questions

What specific Node.js APIs would you use for that?
How would you test that your solution works under load?
What are the potential pitfalls you’d watch out for?

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2-5 years experience

1You added a new feature that uses child_process.exec to run a script, but the application sometimes hangs. How would you debug the issue?
2When using the cluster module to take advantage of multiple CPU cores, what trade‑offs do you consider regarding state sharing and graceful shutdown?
3Why might using exec instead of spawn cause memory problems in a high‑traffic Node service?

5-8 years experience

1Design a process management strategy for a Node.js microservice that must stay up 99.99% and handle traffic spikes, considering clustering, monitoring, and zero‑downtime restarts.
2How would you implement graceful shutdown of a Node.js server that has multiple worker processes handling in‑flight requests?
3Explain how you would decide between using the built‑in cluster module versus an external manager like PM2 in a large‑scale deployment.

8+ years experience

1At an organization level, how would you standardize process management across many Node.js services to ensure consistent observability, restart policies, and resource limits?
2Describe the architectural implications of moving from a monolithic Node.js app using cluster to a container‑orchestrated system (e.g., Kubernetes) that manages processes for you.
3What long‑term maintenance challenges arise from relying on custom process‑management code, and how would you mitigate them across teams?

What is process management? | Threads | nodejs Interview Questions | NextRound.in