upGrad Senior Software Developer Interview Questions and Answers

Q1. Explian oops concepts
Ans. 
Object-oriented programming concepts that focus on classes and objects for better code organization and reusability.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation det...read more
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Q2. Types of waits in selenium
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Types of waits in Selenium include implicit, explicit, and fluent waits.
• Implicit wait: Waits for a certain amount of time before throwing a NoSuchElementException.

• Explicit wait: Waits for a certain condition to occur before proceeding further in the code.

• Fluent wait: Waits for a condition to be true with a specified frequency of checking.

• Example: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
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Q1. Salary dsicussion
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Q2. Previous company details
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Two dynamic programming challenges at the hard level on LeetCode and 10 medium-level SQL challenge.

Given one couple of DSA questions and asked to solve them

Q1. React state management
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Q1. Tell me about your project?
Ans. 
Developed a web application for tracking personal fitness goals and progress.
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end functionality

• Utilized MongoDB for database management
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Q2. What is useState, useEffect, useRedux?
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useState, useEffect, useRedux are hooks in React for managing state and side effects.
• useState is a hook used for managing state in functional components.

• useEffect is a hook used for handling side effects in functional components.

• useRedux is not a built-in hook, but a common convention for using Redux with React.
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Q3. Tell me the changes too place in 2015 EcMascript?
Ans. 
In 2015, EcmaScript 6 (ES6) was released with significant updates and new features.
• Introduction of let and const for block-scoped variables

• Arrow functions for more concise syntax

• Classes for object-oriented programming

• Template literals for string interpolation

• Enhanced object literals and destructuring assignments
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Q4. Explain the flow about how API works?
Ans. 
API works by allowing different software applications to communicate with each other through a set of rules and protocols.
• API receives a request from a client application

• API processes the request and interacts with the server

• API sends back a response to the client application

• Examples: REST API, SOAP API
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Q1. Basic Questions based on pervious project
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Q1. Tell me abt your self
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Q1. Sdlc lifecycle of components and architecture.
Ans. 
SDLC lifecycle involves planning, designing, developing, testing, deploying, and maintaining software components and architecture.
• SDLC (Software Development Life Cycle) includes phases like planning, designing, coding, testing, and maintenance.

• Components are designed, developed, tested, and integrated into the overall architecture.

• Architecture involves defining the structure, behavior, and interactions of software comp...read more
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Q1. Role and responsibility my tasks and questions on project
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Q1. Tell me about yourself
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Q2. Coding Question
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Q1. Tell me about yourself
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Q2. Salary discussion
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