upGrad Senior Software Engineer Interview Questions and Answers

Two Medium DSA problem to solve

Q1. Design scalable Streaming pipeline and
Ans. 
Design a scalable streaming pipeline for processing large volumes of data.
• Use a distributed streaming framework like Apache Kafka or Apache Flink for real-time data processing.

• Implement data partitioning and parallel processing to handle high data throughput.

• Utilize cloud services like AWS Kinesis or Google Cloud Pub/Sub for scalability and reliability.

• Include fault tolerance mechanisms like checkpointing and data repl...read more
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Q1. LLD round , write classes and its methods
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Q1. Salary and benefits discussion
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They give a standard application to develop in mvvm or clean architecture, don't forget to write unit tests

Q1. Mostly discuss on the implementation of the project you've done in round one
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Q2. Flutter is addon
Ans. 
Flutter is a UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.
• Flutter is an open-source framework developed by Google.

• It uses the Dart programming language.

• Flutter allows for hot reload, which enables developers to see changes instantly.

• It provides a rich set of pre-built widgets for building user interfaces.

• Flutter can be used to create apps for iOS, Android, w
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Q3. Explain about compose way of thinking.
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Compose way of thinking involves breaking down complex problems into smaller, manageable parts and then combining them to create a solution.
• Break down a problem into smaller components

• Solve each component individually

• Combine the solutions to create a complete solution

• Example: Using functions to break down a complex task into smaller functions and then combining them to achieve the desired outcome
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Q4. Difference between presenter and viewmodel
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Q5. Explain about lifecycle of view
Ans. 
Lifecycle of view refers to the stages a view goes through from creation to destruction in an application.
• Creation: View is initialized and loaded into memory.

• Layout: View is positioned and sized on the screen.

• Display: View is rendered and displayed to the user.

• Interaction: User interacts with the view through input events.

• Destruction: View is removed from memory when no longer needed.
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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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Q1. Why you want to join ?
Ans. 
I am excited about the opportunity to work on challenging projects and contribute to a talented team.
• Passionate about software development and problem-solving

• Interested in working on cutting-edge technologies

• Excited about collaborating with a talented team to create innovative solutions
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Linkedlist, tree, logical

Q1. Polyfills and Logical
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Q2. List in react and the input box
Ans. 
Answer on how to list in react and the input box
• Use the map function to create a list in React

• Use the state to store the input value

• Use onChange event to update the state when the input value changes

• Use onSubmit event to handle the form submission
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3 coding question around prime number arrays and strings

Q1. Introduce youself
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Q2. Question around project and skill in the resume and one coding question to solve
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Q1. Question on project and skill in resume
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Q2. 2 question arouond data structer and algorithm
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First round was coding test in online platform with 5 questions

Q1. Settings a server in Express JS
Ans. 
Setting up a server in Express JS involves creating an instance of the Express application and defining routes.
• Create an instance of the Express application using the 'express' module

• Define routes using the 'app.get', 'app.post', etc. methods

• Listen for incoming requests using the 'app.listen' method

• Configure middleware using the 'app.use' method

• Handle errors using the 'app.use' method with an error handling middleware
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Q2. What are all join table query and Write an example to join 2 tables.
Ans. 
Explaining join table query and providing an example of joining 2 tables.
• Join table query is used to combine data from two or more tables based on a related column between them.

• Types of join include inner join, left join, right join, and full outer join.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;
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Q1. Explain about Event loop
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Event loop is a mechanism that allows for asynchronous programming by handling events and callbacks.
• Event loop is responsible for handling and executing events and callbacks in a non-blocking manner.

• It continuously checks the event queue and processes events one by one.

• Event loop is commonly used in JavaScript for handling asynchronous operations like setTimeout, setInterval, and AJAX requests.
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Ask to create a database design and API for a todo list app

Q1. Why do you want to join Byjus
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