FabIT Mean Mern Stack Developer Interview Questions and Answers

Q1. Javascript questions were mainly there like closures , currying Objects and promises , then they started with React
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Q2. In react they asked about hooks, difference between props and state, version , useMemo , axios working , microservices
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Q1. Why do u want to join us , u already holding an offer
Ans. 
I am drawn to your company's innovative projects and collaborative work environment.
• I am impressed by the cutting-edge technologies and projects your company is working on.

• I value the opportunity to work in a collaborative and supportive team environment.

• I believe that joining your company will provide me with the chance to further develop my skills and contribute meaningfully to impactful projects.
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Q2. How do u prioritize your task
Ans. 
I prioritize tasks based on deadlines, importance, and dependencies.
• I create a list of all tasks and categorize them based on deadlines.

• I identify tasks that are critical to the project's success and prioritize them accordingly.

• I consider dependencies between tasks and prioritize those that are dependent on others being completed first.

• I regularly reassess priorities and adjust as needed based on changing circumstances...read more
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Q1. Arrays reverse in js
Ans. 
Use the built-in reverse() method to reverse an array in JavaScript.
• Use the reverse() method on the array to reverse its elements in place.

• Example: let arr = ['apple', 'banana', 'cherry']; arr.reverse(); // ['cherry', 'banana', 'apple']
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Q2. String question various conditions
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Q1. React common questions
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Q2. Spring boot and microservices questions
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Q3. Sql questions like second highest salary
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Q4. Java streams interview questions like second highest
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Good morning sir have a you sir my name is hemant Ramchandra narkhede

Java script simple frame

Q1. What are the different data types present in javascript?
Ans. 
JavaScript has several data types including string, number, boolean, object, function, undefined, and null.
• String: 'hello', '123'

• Number: 123, 3.14

• Boolean: true, false

• Object: { key: 'value' }

• Function: function() { }

• Undefined: undefined

• Null: null
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Q2. Difference between var and let keyword in javascript.
Ans. 
var is function-scoped while let is block-scoped in JavaScript.
• var keyword is function-scoped, meaning it is accessible throughout the function it is declared in.

• let keyword is block-scoped, meaning it is only accessible within the block it is declared in.

• Using var can lead to variable hoisting issues, while let provides more predictable behavior.

• let allows for better variable scoping and reduces the risk of unintended
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Q1. What are the advantages of pair programming?
Ans. 
Pair programming promotes collaboration, knowledge sharing, and code quality.
• Enhances code quality through immediate code review and feedback

• Promotes knowledge sharing and learning from each other

• Fosters collaboration and teamwork

• Reduces the likelihood of bugs and errors

• Increases productivity by leveraging two minds on the same problem

• Helps in breaking down complex problems into smaller tasks

• Improves communication skil
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Q2. How do you handle constructive feedback about your full-stack development projects?
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Q1. How do you identify bugs in your code?
Ans. 
I use a combination of manual testing, unit testing, and debugging tools to identify bugs in my code.
• Perform manual testing by running the code and checking for any unexpected behavior or errors.

• Write unit tests to verify the functionality of individual components and catch any issues early on.

• Utilize debugging tools like breakpoints, logging, and stack traces to track down the root cause of bugs.

• Collaborate with team ...read more
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Q2. How long have you been coding primarily in Python?
Ans. 
I have been coding primarily in Python for 5 years.
• I started learning Python in college and have been using it extensively in my professional career.

• I have worked on various projects using Python, including web development, data analysis, and automation.

• I am proficient in Python libraries such as NumPy, Pandas, and Django.
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HR round full stack developer experience

Best atitude round questions

Q1. ES6 new features
Ans. 
ES6 introduces new features like arrow functions, classes, template literals, let and const declarations, and more.
• Arrow functions provide a more concise syntax for writing functions.

• Classes allow for easier object-oriented programming in JavaScript.

• Template literals enable easier string interpolation and multiline strings.

• let and const declarations provide block-scoped variables.

• ES6 also introduces features like destr...read more
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Q2. Closure and their coding questions
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Q3. Lazy loading and redux working in react
Ans. 
Lazy loading is a technique used to defer loading of non-essential resources until they are actually needed, while Redux is a state management library for React applications.
• Lazy loading in React involves dynamically importing components or modules only when they are required, improving performance by reducing initial load times.

• Redux is used in React applications to manage the state of the application in a predictable...read more
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Q4. Call by value & call by reference, object-related, hoisting etc
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Q5. How do we optimize the API and rendering in React?
Ans. 
Optimizing API and rendering in React involves reducing unnecessary API calls, using memoization, lazy loading, and code splitting.
• Reduce unnecessary API calls by batching requests or using GraphQL to fetch only required data.

• Use memoization techniques like useMemo and useCallback to prevent unnecessary re-renders.

• Implement lazy loading for components that are not immediately needed, improving initial load time.

• Utilize...read more
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Q1. Write program using stream API
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Q2. Create Immutable class
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Q1. Abstract and interface difference
Ans. 
Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.
• Abstract classes can have constructors, fields, and non-abstract methods.

• Interfaces can only have abstract methods and constants.

• A class can implement multiple interfaces but can only inherit from one abstract class.
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Q2. Multiple inheritance
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Q1. Tell me about yourself
Ans. 
I am a Full Stack Developer with experience in front-end and back-end technologies, passionate about creating innovative solutions.
• Experienced in HTML, CSS, JavaScript for front-end development

• Proficient in Node.js, Express, MongoDB for back-end development

• Skilled in creating responsive and user-friendly web applications

• Strong problem-solving and communication skills
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Q2. Package discussion
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Python SQL related questions

Python SQL related coding test

Q1. Why are you applying for this job
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Q2. Why should we hire you
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Q3. Why did you leave last job
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Q4. What is more important to you the money or the work
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Q5. Would do you know about this organization
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