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Codinova Technologies Fullstack Javascript Developer Interview Questions and Answers
Codinova Technologies Fullstack Javascript Developer Interview Experiences
1 interview found
Anonymous
(2 Questions)
- Q1. What is maps, reduce, hoisting, strings, var, let, const
- Ans.
Maps, reduce, hoisting, strings, var, let, const are important concepts in JavaScript development.
Maps: Used to transform elements in an array without changing the original array.
Reduce: Used to reduce an array to a single value by applying a function to each element.
Hoisting: Refers to the behavior in JavaScript where variable and function declarations are moved to the top of their containing scope.
Strings: Data type ...
- Q2. Implement custom hook
- Ans.
Custom hook is a reusable function in React that allows you to extract component logic into a separate function.
Create a function starting with 'use' keyword (e.g. useCustomHook)
Use useState, useEffect, useContext, or other hooks inside the custom hook
Return the necessary values or functions from the custom hook
Skills evaluated in this interview
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Interview questions from similar companies
Devi Pushpa
(2 Questions)
- Q1. What is Promise in JS?
- Ans.
Promise in JS is an object representing the eventual completion or failure of an asynchronous operation.
Promises are used to handle asynchronous operations in JavaScript.
They can be in one of three states: pending, fulfilled, or rejected.
Promises can be chained using .then() method to handle success and failure cases.
Example: new Promise((resolve, reject) => { ... }).then(result => { ... }).catch(error => { ... });
- Q2. What is Call back?
- Ans.
A callback is a function passed as an argument to another function to be executed later.
Callback functions are commonly used in asynchronous programming to handle responses or events.
Callbacks can be synchronous or asynchronous.
Example: setTimeout function in JavaScript takes a callback function as an argument to be executed after a specified time.
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in Jan 2024. There was 1 interview round.
(1 Question)
- Q1. 1. Is .map and .filter pure functions ? 2. What should not be blocked in Node.js ? 3. Is For.. in.. loop for iterating through object or arrays ?
- Ans.
1. Yes, .map and .filter are pure functions. 2. Network calls should not be blocked in Node.js. 3. For..in.. loop is for iterating through objects.
1. Yes, .map and .filter are pure functions as they do not modify the original array and always return a new array with the desired transformations or filtered elements.
2. Network calls should not be blocked in Node.js as it can lead to performance issues and hinder the even...
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via Company Website and was interviewed in May 2023. There were 5 interview rounds.
(2 Questions)
- Q1. What are this aws
- Ans.
AWS (Amazon Web Services) is a cloud computing platform that offers a wide range of services for businesses and individuals.
Provides services such as computing power, storage, databases, machine learning, and more
Allows users to scale resources up or down based on demand
Offers a pay-as-you-go pricing model
Popular services include EC2 (Elastic Compute Cloud), S3 (Simple Storage Service), and RDS (Relational Database Ser
- Q2. What are the cloud providers
- Ans.
Cloud providers are companies that offer cloud computing services, allowing users to access and store data and applications on remote servers.
Amazon Web Services (AWS)
Microsoft Azure
Google Cloud Platform
IBM Cloud
Oracle Cloud
What are the tools on devops
(2 Questions)
- Q1. Who was first used on aws
- Ans.
The first service used on AWS was Amazon Elastic Compute Cloud (EC2).
Amazon EC2 was launched in 2006 as one of the first services offered by AWS.
It allows users to rent virtual servers on which to run their own applications.
EC2 provides scalable computing capacity in the cloud.
Many other AWS services, such as S3 and RDS, rely on EC2 instances for their functionality.
- Q2. Netflix company
(1 Question)
- Q1. What are the cloud computing models
- Ans.
Cloud computing models include SaaS, PaaS, and IaaS.
Software as a Service (SaaS) - applications hosted on cloud and accessed via web browser (e.g. Gmail)
Platform as a Service (PaaS) - platform and tools provided to develop, test, and deploy applications (e.g. AWS Elastic Beanstalk)
Infrastructure as a Service (IaaS) - virtualized computing resources like servers, storage, and networking (e.g. AWS EC2)
Interview Preparation Tips
- AWS
Skills evaluated in this interview
I applied via Job Portal and was interviewed in Jun 2023. There were 3 interview rounds.
Exam used to determine an individual's skill or propensity to succeed in a given activity
(2 Questions)
- Q1. An interview to assess your technical ability for the role, and the depth and breadth of your knowledge in your chosen field.
- Q2. Coding, Data analysis, etc. Technical interviews differentiate from general interviews and focus solely on the technical skills of the candidates.
Selected
I applied via Company Website and was interviewed in Nov 2023. There were 3 interview rounds.
Yes, Aptitude test is so think and great full in my knowledge
The coding test is for HTML CSS for the frontend backend for the javascript
Interview Preparation Tips
- Javascript
- C
- Java
- C++
I applied via Job Portal and was interviewed in Aug 2022. There were 2 interview rounds.
(6 Questions)
- Q1. What is vpc and scerious
- Ans.
VPC stands for Virtual Private Cloud, a virtual network dedicated to an AWS account. SCERIOUS is not a recognized term in AWS.
VPC is used to create isolated virtual networks within AWS
It allows users to define their own IP address range, subnets, and route tables
VPC provides control over network traffic, security, and connectivity options
- Q2. S3 name unique or nonuniqe
- Ans.
S3 bucket names are globally unique.
S3 bucket names must be unique across all AWS accounts.
Bucket names can contain lowercase letters, numbers, and hyphens.
Bucket names cannot contain underscores, uppercase letters, or periods.
Example of a valid bucket name: my-bucket-123
Example of an invalid bucket name: My_Bucket
- Q3. Different between bound and unbound
- Ans.
Bound refers to a variable that is assigned to a specific value, while unbound refers to a variable that has not yet been assigned a value.
Bound variables have a specific value assigned to them, while unbound variables do not.
Bound variables are used in programming to store and manipulate data, while unbound variables are used to represent unknown values.
Examples of bound variables include constants and variables that ...
- Q4. What are usecase of slave and master
- Ans.
Slaves and masters are used in distributed systems for load balancing and fault tolerance.
In a distributed system, the master node controls and coordinates the work of the slave nodes.
Slaves perform tasks assigned by the master and report back their results.
Masters can be used for load balancing, where they distribute tasks evenly among slaves.
Masters can also be used for fault tolerance, where they can detect when a s...
- Q5. About container which tools using container in aws devops
- Q6. Explain Aws and brefi
- Ans.
AWS is a cloud computing platform that provides a wide range of services for building and deploying applications.
AWS offers services such as compute, storage, databases, and more
It allows users to easily scale their applications and pay only for what they use
Brefi is a serverless PHP runtime for AWS Lambda
Interview Preparation Tips
- Aws devops
- Python
- Ec2
- Vpc
- Instance
- Github
- Docker
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in Feb 2022. There were 4 interview rounds.
They gave some user story according to our coding skills.
(2 Questions)
- Q1. Core python concepts basic and advance both.
- Q2. Questiins regarding AWS skills like IAM Role, S3, EC2, Redshift, Lambda, Kinesis, SES, SNS, SQS, CloudWatch, Glu.
(1 Question)
- Q1. Duscussion for the salary package.
Interview Preparation Tips
2. Keep active on job seekers platform like LinkedIn and Noukri.
3. Keep gaining knowledge.
4. Prepare your resume from novoresume.
5. Keep update your skills.
I applied via Company Website and was interviewed in Apr 2022. There were 2 interview rounds.
Interview Preparation Tips
I applied via Company Website and was interviewed in Mar 2022. There were 2 interview rounds.
(1 Question)
- Q1. Why should we hire you?
Interview Preparation Tips
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