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Lattice Innovations Node JS Developer Interview Questions and Answers
Lattice Innovations Node JS Developer Interview Experiences
1 interview found
Anonymous
I applied via Internshala and was interviewed before Mar 2021. There were 3 interview rounds.
1. Building APIs for a healthcare system
2. Coding assignment on pen & paper
Expectations from first assignment was to write efficient mysql queries and follow standard auth protocols.
(1 Question)
- Q1. What are joins in mysql ? what is middleware ? what is JWT ? Difference between POST, PUT and GET ? Difference between RDBMS and No-sql DBMS ? And a lot.... Every question was related to my assignment and...
- Ans.
Questions related to backend development concepts and technologies.
Joins in MySQL are used to combine data from two or more tables based on a related column.
Middleware is software that acts as a bridge between different applications or systems.
JWT (JSON Web Token) is a standard for securely transmitting information between parties as a JSON object.
POST is used to submit data to be processed, PUT is used to update exist...
(2 Questions)
- Q1. What are your strengths and weaknesses?
- Ans.
My strengths include strong problem-solving skills and a deep understanding of Node.js. My weaknesses include a tendency to be overly critical of my own work.
Strength: Strong problem-solving skills
Strength: Deep understanding of Node.js
Weakness: Overly critical of my own work
- Q2. Tell me about yourself.
- Ans.
I am a Node JS Developer with 5 years of experience in building scalable and efficient web applications.
5 years of experience in Node JS development
Proficient in building scalable and efficient web applications
Strong knowledge of JavaScript and related frameworks
Experience with RESTful APIs and database management
Familiarity with front-end technologies such as HTML, CSS, and React
Ability to work in a team and meet proj
Interview Preparation Tips
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
I was interviewed in Jul 2017.
Interview Questionnaire
6 Questions
- Q1. What is autoboxing and unboxing
- Ans.
Autoboxing is the automatic conversion of primitive data types to their corresponding object wrapper classes.
Autoboxing is useful when working with collections that require objects instead of primitives.
Example: int i = 5; Integer j = i; //autoboxing
Unboxing is the opposite of autoboxing, where an object of a wrapper class is converted back to its corresponding primitive type.
Example: Integer j = 5; int i = j; //unboxi
- Q2. What is typecasting UP AND DOWN
- Ans.
Typecasting up and down refers to converting a variable of one data type to another data type of higher or lower precision.
Typecasting up involves converting a variable of lower precision to a variable of higher precision, such as converting an int to a double.
Typecasting down involves converting a variable of higher precision to a variable of lower precision, such as converting a double to an int.
Typecasting can resul...
- Q3. How do you iterate map
- Ans.
To iterate a map in Java, use a for-each loop or an iterator.
Use the entrySet() method to get a set of key-value pairs
For-each loop: for(Map.Entry
Iterator: Iterator
Use hasNext() and next() methods to iterate through the map
- Q4. Types of synchronisation in java
- Ans.
Types of synchronization in Java
Synchronized methods
Synchronized statements
ReentrantLock
Semaphore
CountDownLatch
- Q5. Access modifiers in method overriding
- Ans.
Access modifiers in method overriding
Access modifiers in the overriding method cannot be more restrictive than the overridden method
The access modifier can be less restrictive or the same as the overridden method
Private methods cannot be overridden
Examples: public method can be overridden by public or protected method, but not by private method
- Q6. Covarient return type
Skills evaluated in this interview
Sakthivel B
I was interviewed in Jun 2017.
Interview Preparation Tips
Experience: They asked java basics,
what we wrote in resume will ask
about project
Tips: please prepare basics things
Interview Questionnaire
1 Question
- Q1. Abstraction
I applied via Naukri.com and was interviewed in Aug 2018. There were 5 interview rounds.
Interview Questionnaire
4 Questions
- Q1. 1.Core java 2.Spring 3. Hibernate 4. Spring Boot 5. SQL 6. AngularJS
- Ans.
The question is asking about the candidate's knowledge in Core Java, Spring, Hibernate, Spring Boot, SQL, and AngularJS.
Core Java is the foundation of Java programming language.
Spring is a popular framework for building Java applications.
Hibernate is an ORM tool used for mapping Java objects to database tables.
Spring Boot is a framework for building microservices.
SQL is a language used for managing relational databases...
- Q2. 1. How to connect 2 DBs from spring boot application
- Ans.
To connect 2 DBs from a Spring Boot application, configure multiple data sources and use JdbcTemplate or EntityManager for each DB.
Configure multiple data sources in the application.properties file
Create separate configuration classes for each data source
Use JdbcTemplate or EntityManager to interact with each DB
Specify the appropriate data source in the repository or service classes
- Q3. 2. Difference between abstract method implementation and default method
- Ans.
Abstract method implementation is mandatory while default method is optional.
Abstract method has no implementation in the abstract class and must be implemented by the subclass.
Default method has a default implementation in the interface and can be overridden by the implementing class.
Abstract method is used to enforce a contract while default method is used to provide a default behavior.
Example: abstract method - publ...
- Q4. 1. About salary and expectation
Interview Preparation Tips
Experience: Technical written test
General Tips: Terrible interview. HR told to give 11% hike with 6% variable and 5% fixed. I kicked off the company.
Skills: Web Technologies, Java Application Development
Duration: 1-4 weeks
Skills evaluated in this interview
Interview Preparation Tips
Experience: I almost sove 130 question
Duration: 2 hours
Total Questions: 150
Round: Group Discussion
Experience: Problem Solving Algorithms
Duration: 3 hours
vishali ravichandran
I was interviewed in Jun 2017.
Interview Questionnaire
2 Questions
- Q1. The questions are about fully java
- Q2. About myself, and something about java, then the questions about general topic
Interview Preparation Tips
Experience: Most of the questions is new for me but I were manage
Tips: Good preparation
Round: HR Interview
Experience: Most of the questions is new for me but I were manage
Tips: Good preparation
College Name: Avvm spc, thanjavur
I was interviewed in Feb 2017.
Interview Questionnaire
3 Questions
- Q1. Basic Java questions, OOPs questions, Questions on abstract, Inteface classes, Spring questions, Hibernate questions, Tomcat server questions.
- Q2. Related to Project in you worked, work experience, how many technology you know about
- Q3. Hobbies, aspirations, your family background, what you like dislike, Salary negotiation.
Interview Preparation Tips
Experience: Interview was for 30 minutes duration. They have started with basic concepts like Abstract, Interface etc. Then they moved to core java. Some basic question on core java related to Exceptions, try-catch-finally blocks. Spring MVC basic questions, bean mapping questions. use of tomcat server in eclipse.
Tips: I was lucky at that day.
Interview was more likely of fresher level. I was first in the interview process, interviewer were not ready, so they directly asked few questions to me.
Level of interview was not up to the mark, I prepared for tougher interview, gone thru 500+ questions on core java, spring, hibernate, exceptions and try catch.
0-3 years in java is equivalent to fresher. But you have to be prepared for worst if you really wanted the job.
Before going to the interview, Do hands-on.
Round: Technical + HR Interview
Experience: They call it MR interview.
This interview was on call, after TR, same day. One HR dialed a no. for me.
The person asked about my previous experience in projects, How many technologies I have worked on. Why i am leaving my current employers as I have only 2 years of experience.
How much I am open up to new technologies.
Where i see myself after 5 years.
What are my career aspirations.
How much flexible I am with shifts and work loads.
Tips: Its simple round, You have to be sure why you want this job. give them a very valid reason of your own. Don't copy anybody else's answer. Be confident. If it is on call, speak clearly, maintain pace and voice. They may throw situations and puzzles. be calm, use your mind. Its fine if you don't know about anything. But don't tell directly that you don't know. Try to use all the positive words and phrases.
Round: HR Interview
Experience: They asked some question about myself. about family background. about hobbies and from your resume also, like how many projects you have done.How you are feeling in IT industry. Why this company.
At last salary negotiations. They have started with lowest, 10% hike. and i was expecting 40-50% hike.
I am getting 4 LPA right now, the offered me 5.2LPA at last. I had no options, so i agreed.
But i was very disappointed and tried my best to get more, but they convinced me that it is the best for my role.
Tips: Be confident and look happy, show the joy when you tell about your hobbies. It will lighten up the environment.
Don't insult your previous employer. Defend your current employer if the say something wrong, It a tricky ques
I applied via Naukri.com and was interviewed before May 2021. There was 1 interview round.
(1 Question)
- Q1. Basic java concepts like collection frame work, exception handling
Interview Preparation Tips
I applied via Campus Placement and was interviewed before Oct 2020. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. What is encapsulation ?
- Ans.
Encapsulation is the process of hiding implementation details and providing access to only necessary information.
Encapsulation helps in achieving data abstraction and information hiding.
It allows for better control over data and prevents unauthorized access.
In Java, encapsulation is achieved through the use of access modifiers such as private, public, and protected.
For example, a class may have private variables that c...
- Q2. What is the meaning of string.
- Ans.
A string is a sequence of characters used to represent text in programming.
Strings are often used for storing and manipulating text data.
In Java, strings are represented by the String class.
Strings can be concatenated using the + operator.
Strings are immutable, meaning they cannot be changed once created.
Examples of string literals include "hello world" and "42".
Interview Preparation Tips
Skills evaluated in this interview
Lattice Innovations Interview FAQs
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