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NES.TECH Node Js Backend Developer Interview Questions and Answers
NES.TECH Node Js Backend Developer Interview Experiences
1 interview found
Anonymous
I applied via tophire and was interviewed in Aug 2023. There were 2 interview rounds.
(4 Questions)
- Q1. What is node js ?
- Ans.
Node.js is a runtime environment that allows you to run JavaScript on the server side.
Node.js is built on Chrome's V8 JavaScript engine.
It uses an event-driven, non-blocking I/O model.
Node.js is commonly used for building scalable network applications.
- Q2. Node js async/await vs promised
- Ans.
Async/await simplifies asynchronous code in Node.js by using promises under the hood.
Async/await is syntactic sugar built on top of promises in Node.js
Async/await makes asynchronous code look synchronous, making it easier to read and write
Promises are still used under the hood with async/await, providing better error handling and chaining
- Q3. Javascript script concepts
- Q4. Code optimization techniques
- Ans.
Code optimization techniques improve performance and efficiency of code.
Use efficient data structures and algorithms
Minimize the number of database queries
Avoid unnecessary loops and function calls
Optimize memory usage by avoiding memory leaks
Use caching to reduce redundant computations
(1 Question)
- Q1. What is the expected income?
- Ans.
The expected income for a Node Js Backend Developer can vary depending on factors such as experience, location, and company size.
Income can range from $60,000 to $150,000+ per year.
Factors influencing income include years of experience, level of expertise, and the specific industry.
Location can also play a significant role in determining salary, with higher salaries typically found in tech hubs like Silicon Valley.
Work...
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Interview Questionnaire
2 Questions
- Q1. Self introduction
- Q2. What is java
- Ans.
Java is a high-level programming language known for its platform independence and object-oriented approach.
Java is widely used for developing desktop, web, and mobile applications.
It is known for its robustness, security, and scalability.
Java programs are compiled into bytecode that can run on any Java Virtual Machine (JVM).
It supports multithreading, exception handling, and automatic memory management.
Popular framewor...
Skills evaluated in this interview
I applied via Campus Placement and was interviewed before Aug 2020. There were 4 interview rounds.
Interview Questionnaire
4 Questions
- Q1. What is collections
- Ans.
Collections are data structures that store and manipulate groups of objects.
Collections provide a way to organize and manage large amounts of data
They can be used to perform operations on groups of objects, such as sorting or searching
Examples of collections include arrays, lists, sets, and maps
- Q2. What are the new features in java 8
- Ans.
Java 8 introduces lambda expressions, functional interfaces, streams, and default methods.
Lambda expressions allow functional programming in Java
Functional interfaces enable the use of lambda expressions
Streams provide a concise way to perform operations on collections
Default methods allow interfaces to have implementation
Date and Time API improvements
Nashorn JavaScript engine
- Q3. What is the use of spring boot
- Ans.
Spring Boot is a framework for building standalone, production-grade Spring-based applications.
Spring Boot simplifies the process of creating and deploying Spring-based applications.
It provides a pre-configured environment with a set of opinionated defaults.
It includes embedded servers like Tomcat, Jetty, and Undertow.
It supports a wide range of data sources and data access technologies.
It enables easy integration with...
- Q4. What is JPA
- Ans.
JPA stands for Java Persistence API, a specification for object-relational mapping in Java applications.
JPA is used to map Java objects to relational database tables.
It provides a set of annotations to define the mapping between Java classes and database tables.
JPA also supports querying data using the Java Persistence Query Language (JPQL).
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Skills evaluated in this interview
I applied via Referral and was interviewed before Jun 2020. There were 3 interview rounds.
Interview Questionnaire
1 Question
- Q1. Technical questions.
Interview Preparation Tips
If you are lucky you will get project with new technologies and you can learn.
I applied via Company Website and was interviewed in Dec 2020. There were 3 interview rounds.
Interview Questionnaire
1 Question
- Q1. Apti & programming
Interview Preparation Tips
Aarthi R
I applied via Company Website and was interviewed before Dec 2020. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. 1. Data structure questions
Interview Preparation Tips
I applied via Campus Placement and was interviewed before May 2021. There were 4 interview rounds.
VERBAL QUANT DI/LR and Picture based test
(1 Question)
- Q1. Write a fibonaci series in c++ or C?
- Ans.
Fibonacci series can be easily implemented using loops in C++ or C.
Declare variables for first two numbers of the series
Use a loop to calculate and print the next number in the series
Repeat the loop until desired number of terms are printed
(1 Question)
- Q1. Informed about the policies and made us sign a document
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Skills evaluated in this interview
I appeared for an interview before Sep 2020.
Round duration - 90 minutes
Round difficulty - Easy
This round was held during university hours and consisted of 2 coding questions.
(1 Question)
Round duration - 120 minutes
Round difficulty - Easy
Make sure you do no cutting and are clear about the approach you'd be following.
- Q1. What is the running median of an input stream?
- Ans.
Running median of an input stream is the median value of the numbers seen so far in a continuous stream of data.
Maintain two heaps - a max heap for the lower half of the numbers and a min heap for the upper half.
Keep the number of elements in the two heaps balanced or differ by at most 1.
If the total number of elements is odd, the median is the root of the max heap. If even, it is the average of the roots of the two he...
Interview Preparation Tips
Prepare for company-wise interview questions according to the company in which you are applying. Try to write the code yourself and if got stuck in between then take help from the internet. I recommend you Codezen of Coding Ninjas for practicing Data Structures and Algorithms based questions.
Application resume tips for other job seekersBe sure 100% of what you write in your resume and prepare for that before the interview what is written on resume.
Final outcome of the interviewSelectedSkills evaluated in this interview
I applied via Company Website and was interviewed before Oct 2021. There were 5 interview rounds.
Basic Aptitude with some difficult questions
3 set of coding question were asked 1 easy ,1 medium ,1 hard
(1 Question)
- Q1. This was personal technical interview asking all related to my cv and the one they are looking for
(1 Question)
- Q1. Basic personality questions
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Interview Questionnaire
1 Question
- Q1. Why Infosys
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