Chaincode Consulting Senior Node Js Developer Interview Questions and Answers

Q1. All javascript core concepts and react hooks
Add your answer

Find the max values, promises, async await

Q1. Tell me about yourself?
Add your answer
Q2. What is your work visa status?
Add your answer
Q3. How early can you interview?
Add your answer

Q1. What is callback function in NodeJS?
Ans. 
A callback function in NodeJS is a function that is passed as an argument to another function and is executed later.
• Callback functions are commonly used in asynchronous programming in NodeJS.

• They allow us to handle the result of an asynchronous operation once it is completed.

• Callback functions can be defined inline or as separate named functions.

• They are often used with functions like setTimeout, readFile, and database...read more
Answered by AI
Add your answer
Q2. What would be the output of the setTimeOut JS functions?
Ans. 
The setTimeout function in JavaScript is used to schedule a task to be executed after a specified delay.
• The setTimeout function takes two parameters: a callback function and a delay time in milliseconds.

• The callback function is executed after the specified delay.

• The setTimeout function returns a unique identifier (timer ID) that can be used to cancel the execution of the callback function using the clearTimeout functio...read more
Answered by AI
Add your answer
Q3. What is OAuth and how you implement it?
Ans. 
OAuth is an open standard for authorization that allows users to grant access to their data without sharing their credentials.
• OAuth is used to authenticate and authorize users in applications.

• It allows users to grant limited access to their data to third-party applications.

• OAuth uses tokens to grant access instead of sharing credentials.

• The OAuth flow involves the client, server, and the authorization server.

• Popular OA...read more
Answered by AI
Add your answer
Q4. What are the MongoDB code to connect from NodeJS backend?
Ans. 
To connect to MongoDB from NodeJS backend, use the 'mongodb' package and the 'MongoClient' class.
• Install the 'mongodb' package using npm: npm install mongodb

• Require the 'mongodb' package in your NodeJS file: const MongoClient = require('mongodb').MongoClient

• Create a connection URL with the appropriate MongoDB server details: const url = 'mongodb://localhost:27017/mydatabase'

• Use the 'MongoClient' class to connect to the...read more
Answered by AI
Add your answer
Q5. Write a SQL command to get the TOP 3 list in a data set?
Ans. 
SQL command to get the TOP 3 list in a data set
• Use the SELECT statement to retrieve data from the table

• Use the ORDER BY clause to sort the data in descending order

• Use the LIMIT clause to limit the result set to 3 rows
Answered by AI
Add your answer
Q6. How you use Terraform?
Ans. 
Terraform is used to automate infrastructure provisioning and management.
• Terraform is a tool for defining and provisioning infrastructure as code.

• It allows you to create, modify, and destroy infrastructure resources using declarative configuration files.

• Terraform supports various cloud providers like AWS, Azure, and GCP.

• You can define infrastructure resources such as virtual machines, networks, and storage using Terraf...read more
Answered by AI
Add your answer
Q7. How you implemented Docker and Kubernetes?
Ans. 
I implemented Docker and Kubernetes to containerize and orchestrate my NodeJS applications.
• I used Docker to create containers for my NodeJS applications, ensuring consistency and portability.

• I wrote Dockerfiles to define the environment and dependencies for each application.

• I used Docker Compose to define and manage multi-container applications.

• I used Kubernetes to orchestrate and manage the deployment, scaling, and mo...read more
Answered by AI
Add your answer
Q8. What is AWS Mesh?
Ans. 
AWS Mesh is a service mesh that provides secure communication between microservices in a containerized application.
• AWS Mesh is built on top of AWS App Mesh, which is a managed service for service mesh architecture.

• It allows developers to easily monitor and control the communication between microservices.

• AWS Mesh provides features like traffic routing, load balancing, service discovery, and observability.

• It supports var...read more
Answered by AI
Add your answer

Q1. Routing protocols
Add your answer

React js Assessments

Q1. No questions has been asked , panel members were not joined.
Add your answer
Q2. No questions has been asked
Add your answer