Skip to contentSkip to footer

Node Interview Questions

Salaries
Interviews

1,043 node interview questions shared by candidates

Write a function that will recursively merge two objects with the following conditions: 1.) If a[field] is an array, and b[field] is defined and is not an array, add b[field] to the array 2.) If a[field] is an array an b[field] exists but is undefined or null, set a[field] to an empty array 3.) If a[filed] is an array and b[field] is an array, set a[field] to b[field] 4.) If a[field] exists and b[field] exists but is undefined, delete a[field] 5.) If b[field] is a non-complex type (number, string, boolean, et cetera), copy to a[field] Example: var a = { first_name: 'Bob', last_name: 'Joness', email: 'bob@gmail.com', address: { line_1: '1234 Main St', line_2: 'Apt 413', city: 'Los Angeles', state: 'CA', zip: '90048' }, logins: [ { date: '10/22/2012', ip: '192.168.0.1' }, { date: '10/21/2012', ip: '192.168.0.1' } ], photos: [ 'IMG-1985.jpg', 'IMG-1987.jpg' ] } var b = { last_name: 'Jones', active: true, address: { line_1: '2143 South Main St', line_2: undefined }, logins: { date: '10/23/2012', ip: '192.168.0.1' }, photos: undefined } Result: { first_name: 'Bob', last_name: 'Jones', active: true, email: 'bob@gmail.com', address: { line_1: '2143 South Main St', city: 'Los Angeles', state: 'CA', zip: '90048' }, logins: [ { date: '10/22/2012', ip: '192.168.0.1' }, { date: '10/21/2012', ip: '192.168.0.1' }, { date: '10/23/2012', ip: '192.168.0.1' } ], photos: [] } Assumptions: 1.) You can assume you are working in node; e.g. you have access to array methods such as .some and .forEach, and you do not have to worry about browser compatibility issues 2.) You do not have access to utilities such as lodash or underscore
avatar

Senior Node JS Developer

Interviewed at GlobalLogic

3.8★
Jun 19, 2022

Write a function that will recursively merge two objects with the following conditions: 1.) If a[field] is an array, and b[field] is defined and is not an array, add b[field] to the array 2.) If a[field] is an array an b[field] exists but is undefined or null, set a[field] to an empty array 3.) If a[filed] is an array and b[field] is an array, set a[field] to b[field] 4.) If a[field] exists and b[field] exists but is undefined, delete a[field] 5.) If b[field] is a non-complex type (number, string, boolean, et cetera), copy to a[field] Example: var a = { first_name: 'Bob', last_name: 'Joness', email: 'bob@gmail.com', address: { line_1: '1234 Main St', line_2: 'Apt 413', city: 'Los Angeles', state: 'CA', zip: '90048' }, logins: [ { date: '10/22/2012', ip: '192.168.0.1' }, { date: '10/21/2012', ip: '192.168.0.1' } ], photos: [ 'IMG-1985.jpg', 'IMG-1987.jpg' ] } var b = { last_name: 'Jones', active: true, address: { line_1: '2143 South Main St', line_2: undefined }, logins: { date: '10/23/2012', ip: '192.168.0.1' }, photos: undefined } Result: { first_name: 'Bob', last_name: 'Jones', active: true, email: 'bob@gmail.com', address: { line_1: '2143 South Main St', city: 'Los Angeles', state: 'CA', zip: '90048' }, logins: [ { date: '10/22/2012', ip: '192.168.0.1' }, { date: '10/21/2012', ip: '192.168.0.1' }, { date: '10/23/2012', ip: '192.168.0.1' } ], photos: [] } Assumptions: 1.) You can assume you are working in node; e.g. you have access to array methods such as .some and .forEach, and you do not have to worry about browser compatibility issues 2.) You do not have access to utilities such as lodash or underscore

Its kind of pair programming, the interviewer asked to build a component in react for showing progress bar, next asked to write code for downloading data from external api and converting the files with yaml extension to json.
avatar

React.Js with Node

Interviewed at Wipro

3.6★
Mar 21, 2024

Its kind of pair programming, the interviewer asked to build a component in react for showing progress bar, next asked to write code for downloading data from external api and converting the files with yaml extension to json.

Viewing 1021 - 1030 interview questions

Glassdoor has 1,043 interview questions and reports from Node interviews. Prepare for your interview. Get hired. Love your job.