Unicode Systems Software Developer Trainee Interview Questions and Answers

Q1. What is the difference between== and === in javascript?
Ans. 
In JavaScript, == is used for loose equality comparison, while === is used for strict equality comparison.
• == checks for equality after type coercion, while === checks for equality without type coercion

• === is more strict and recommended for use to avoid unexpected behavior

• Example: 1 == '1' will return true, but 1 === '1' will return false
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Q2. == refers to only value comparison and === refers to both data type and value comparison
Ans. 
True. == compares only values, while === compares both values and data types.
• == is used for value comparison, while === is used for both value and data type comparison

• Example: 5 == '5' will return true, but 5 === '5' will return false

• Example: 5 === 5 will return true, as both value and data type are the same
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5 technical questions were asked out of which 3 tests are to be cleared

Q1. What is NVM?
Ans. 
NVM stands for Node Version Manager, a tool used to manage multiple versions of Node.js on a single machine.
• NVM allows developers to easily switch between different versions of Node.js for different projects.

• It helps in avoiding conflicts between different projects that require different versions of Node.js.

• NVM is commonly used in development environments where different projects have different Node.js version requirem
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Q2. Node version Manager where we can handle higher node js version in a lower node js version
Ans. 
Node Version Manager (NVM) allows managing multiple Node.js versions on the same machine.
• NVM allows you to easily switch between different Node.js versions on your machine.

• It helps in handling higher Node.js versions in a lower Node.js version environment.

• You can install, uninstall, and switch between Node.js versions using NVM.

• Example: 'nvm install 12.18.3' to install a specific Node.js version.
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The company came on campus, and it was the very first round in which it was not a group discussion, more it was like an individual interview within a group of 10 people of my college, the interviewer asked question on Polymorphism, Inheritance and difference between class and structure and told everyone to not to speak same answer as the groupmate it was all live and was proctored.
I was the only Person out of sixty one students who were shortlisted for face to face interview in Noida add the company's office itself I reached there add two in the noon There was no receptionist I waited for like 57 minutes on the sofa I knocked the gate nobody answered it again knocked the gate there was a developer standing over I asked him to come out and I had a word with him and what the statement he gave me I was in shock he asked me why are you here and for what purpose you are here I was like bro is this for real I told him I had an interview scheduled and I came all the way from a particular place which is 280 kilometers one side from their office and I started 4 in the morning.

They gave me a coding question paper in which there were two questions number one was reverse a string and input sample input was Helo and we have to reverse that and the next question was of matrix in which the question was there is a matrix of M Cross N Rows you have to spiral traverse it in clockwise direction and output the elements in one day array form this was the question so I had to solve this I solved both the questions but the 1st 1 was absolutely easy I cleared it very easily and the second question it was little bit tricky and it was of medium level so I attempted it and 15 to 20% I made some logic and gave the paper to the HR that I am done with the paper you can give it to the concerned developer and After my paper got checked the developer came It was that developer only Whom I have mentioned in the very first paras he was from Bihar he came to me he told me Explain both the programs I explained him the first one very easily and I explained him the 2nd one program's approach as welI I did knew that it was not absolutely right but yeah I told him the approach that I used so he told me to explain me the very first program which was reversing of string without using the logic which I used the logic that I used was of slicing he said me that he told me that I don't have to use this logic And neither I have to use a direct function he told me you have to solve this program by a logic in which you don't have to define a new variable I was like I asked him questions back and forth for 5 to 7 minutes we had a discussion and I gave him the code in python he said no so I gave him the code in C++, in C++ when I used the loop so I have to initialize i that means I have initialized a new variable I gave him the paper I made my hands up I was like no sir I'm not able to do it if you can do it would be very appreciable so he took the pen and wrote the code and the funniest thing I found about that when he wrote the entire code he defined 3 new variables and I was like you told me not to do that and you're doing it by yourself and I asked the interviewer very politely sir you have defined 3 new variables so he told me no no no the question that I wanted to ask you that there should be low space complexity I was like what the heck bro he didn't ask me this question and to defend his answer he told me that we can erase these things these 3 things I was like if I would have done that you weren't allowing me to erase that and if you did then you can erase that bravo!!! well done this entire process was completed in less than 5 minutes then the HR came she told me we will intimate me the result through my WhatsApp but I asked her again she told me we will intimate you through WhatsApp and when I came out of the office I knew it because they didn't have my WhatsApp number I knew it so moral of the story is I wasted my 20 hours of single day because I traveled back to the same place from where I started I lost my 20 hours just for the sake of 5 minute interview and how on Earth you can judge a software developer trainee interviewe in less than 5 minutes.

Q1. So you have prior experience with Javascript ?
Ans. 
Yes, I have prior experience with Javascript.
• I have worked on various projects using Javascript.

• I am familiar with popular Javascript libraries and frameworks like React and Node.js.

• I have experience in writing clean and efficient Javascript code.

• I have used Javascript for both front-end and back-end development.
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In the previous round, they give you a link to freecodecamp course - basic javascript.
In this round (Coding) every single question is asked from the exact same course, as is.

Q1. The HR discusses salary and commutation and other things
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C, C++, Java, Object-Oriented Programming (OOP), and aptitude questions.(online)

Two coding questions involve strings and arrays, specifically the buy and sell stock problem, followed by a focus on binary, and then another string-related question.

Q1. All the questions are came from resume and mysql , sql , nosql ,habit , java basics, projects, html tags , project flow chart. , what is spring orm etc 45 minutes one on one round
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Q2. Difference between mysql and nosql and sql
Ans. 
MySQL is a relational database management system, NoSQL is a non-relational database management system, and SQL is a query language used to interact with databases.
• MySQL is a traditional relational database that uses structured query language (SQL) for querying and managing data.

• NoSQL databases are non-relational and can handle unstructured data. They are more flexible and scalable than MySQL.

• SQL is a language used to ...read more
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Q3. What is the uses of this project
Ans. 
This project is used for managing and tracking software development tasks and projects.
• Helps in organizing tasks and deadlines

• Allows team collaboration and communication

• Tracks progress and milestones

• Generates reports for project analysis
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Q4. Write 10 html tag
Ans. 
List of 10 HTML tags commonly used in web development
• <html>

• <head>

• <title>

• <body>

• <div>

• <p>

• <a>

• <img>

• <ul>

• <li>
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Q5. Why you use microservices
Ans. 
Microservices offer scalability, flexibility, and easier maintenance in software development.
• Scalability: Microservices allow for individual components to be scaled independently, leading to better resource utilization.

• Flexibility: Each microservice can be developed, deployed, and updated independently, allowing for faster innovation and adaptation to changing requirements.

• Easier maintenance: With smaller, more focused...read more
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Basic String and Array related questions.

A project will be assigned, a basic CRUD operation.

Q1. Which will you prefer MySQL or Mongo for your database and why?
Ans. 
I would prefer MySQL for structured data and complex queries, while MongoDB for unstructured data and scalability.
• MySQL is better for structured data and complex queries

• MongoDB is better for unstructured data and scalability

• MySQL supports ACID transactions, while MongoDB is eventually consistent

• MySQL is widely used in traditional relational databases, while MongoDB is popular for NoSQL databases
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Q2. What is Virtual Dom and explain?
Ans. 
Virtual DOM is a lightweight copy of the actual DOM in memory, used for efficient updates in web development.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• When changes are made to the virtual DOM, a diffing algorithm is used to identify the minimal changes needed to update the actual DOM.

• This approach reduces the number of updates needed and improve
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Q1. Java Questions Basically
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There were 5 coding questions in which you have to score minimum 3 to qualify for the next rounds.

An assignment was give which we have to complete it with in 7 days.

Q1. About project tech stacks.
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Q2. Php, laravel, MySQL
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Q1. What is Laravel Middleware?
Ans. 
Laravel Middleware is a filter that is executed before or after an HTTP request enters the application.
• Middleware can modify the request before it reaches the route handler.

• It can also modify the response before it is sent back to the client.

• Middleware can be used for authentication, logging, CORS, etc.

• Example: 'auth' middleware in Laravel checks if the user is authenticated before allowing access to a route.
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Q2. What is Laravel Sanctum?
Ans. 
Laravel Sanctum is a lightweight package for API authentication using tokens in Laravel applications.
• Provides a simple API token authentication system for SPAs and mobile apps

• Uses API tokens to authenticate users without the need for passwords

• Supports token abilities for fine-grained access control

• Easy to integrate and use in Laravel applications
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