Mountblue Technologies Full Stack Developer Interview Questions and Answers

On campus aptitude test

Q1. About oops concepts and java questions
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Q1. Discussion about location and why virtusa
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Quantitative , figure ,mcq question based on tech stack and 2 coding question which are basic. 90 minute time limit.

Q1. Angular question
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Q2. .net question and sql question
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Q1. Duplicate value in a array
Ans. 
Finding duplicate values in an array of strings
• Iterate through the array and store each element in a hash set

• If an element is already in the hash set, it is a duplicate

• Return the duplicate values found
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Q1. Generators In Javascript
Ans. 
Generators in JavaScript are functions that can be paused and resumed, allowing for asynchronous programming.
• Generators are defined using function* syntax.

• They use the yield keyword to pause execution and return a value.

• Generators can be iterated over using a for...of loop.

• They are commonly used for asynchronous operations and managing state.
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Q2. Flatten a array without using inbuild functions
Ans. 
Flatten an array without using inbuilt functions
• Create a recursive function to iterate through the array elements

• Check if each element is an array, if so, call the function recursively

• Concatenate the elements into a new array
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Regarding To My Full Stack

Regarding To My Full Stack

Q1. What Is Python And Discuss With Some Questions
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Q2. In that Case Studies
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Q1. Difference between authentication and authorization
Ans. 
Authentication verifies the identity of a user, while authorization determines what a user can access.
• Authentication confirms the user's identity through credentials like passwords or biometrics

• Authorization controls the user's access to resources or features based on their identity and permissions

• Example: Logging into a website with a username and password is authentication, while being able to view/edit specific page
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Q2. What is promises
Ans. 
Promises are objects 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() to handle success and .catch() to handle errors.
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Q3. What is rxjs and its uses
Ans. 
RxJS is a library for reactive programming using Observables to handle asynchronous data streams.
• RxJS stands for Reactive Extensions for JavaScript.

• It allows you to work with asynchronous data streams and handle events.

• RxJS provides operators to transform, filter, combine, and create observables.

• Example: Using RxJS to handle user input events in a web application.
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Q1. Explain architecture of project
Ans. 
The project architecture follows a microservices design pattern with separate front-end and back-end components.
• Utilizes microservices architecture for scalability and flexibility

• Separate front-end and back-end components for modularity

• May include technologies like Docker for containerization and Kubernetes for orchestration
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Q2. Async and await difference
Ans. 
Async and await are keywords in JavaScript used for handling asynchronous operations.
• Async is used to define a function as asynchronous, allowing it to use the await keyword.

• Await is used to pause the execution of an async function until a Promise is settled.

• Async functions always return a Promise, which resolves with the value returned by the function.

• Using async/await makes asynchronous code easier to read and write
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