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Node Js Developer Interview Questions

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930 node js developer interview questions shared by candidates

Q. Diff between arrow functions and normal function Q. javascript prototype function and defining new function Q. prototype bind and apply Q. node js class constructor and functional constructor Q. middleware next() error handling. Q. cluster module uses in node js Q. small code snippets on promise handling Q. scope of let and var etc
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Node Js Developer

Interviewed at Walmart Global Tech

3.6★
Jul 22, 2022

Q. Diff between arrow functions and normal function Q. javascript prototype function and defining new function Q. prototype bind and apply Q. node js class constructor and functional constructor Q. middleware next() error handling. Q. cluster module uses in node js Q. small code snippets on promise handling Q. scope of let and var etc

About yourself Project details and your KRAs Event Emitters, Middlewares and ExpressJs. Multitasking, async and await, Callbacks. What authorization technique you follow to secure an API. One logical questions "If someone stolen your JWT token how will you secure." JS practical questions. Diff between map, reduce and filter functions let str="Sehdev" //count characters occurence //output {s:1, e:2, h:1, d:1, v:1}
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Node Js Developer

Interviewed at R Systems

3.9★
Nov 11, 2021

About yourself Project details and your KRAs Event Emitters, Middlewares and ExpressJs. Multitasking, async and await, Callbacks. What authorization technique you follow to secure an API. One logical questions "If someone stolen your JWT token how will you secure." JS practical questions. Diff between map, reduce and filter functions let str="Sehdev" //count characters occurence //output {s:1, e:2, h:1, d:1, v:1}

- Evaluation of test by sharing screen. - Acid properties, Transactions and locking. - Why node is single threaded. - How can you scale a node js app vertically. - Do you consider Node js for cpu intensive tasks ? - Employee and Department and with 1 to many relation - Employee and Department and with many to many relation - Write a query to display all the departments having having no employee assigned w.r.t many to many relation.
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Node Js Developer

Interviewed at Deel

4.4★
Feb 13, 2024

- Evaluation of test by sharing screen. - Acid properties, Transactions and locking. - Why node is single threaded. - How can you scale a node js app vertically. - Do you consider Node js for cpu intensive tasks ? - Employee and Department and with 1 to many relation - Employee and Department and with many to many relation - Write a query to display all the departments having having no employee assigned w.r.t many to many relation.

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