upGrad Senior Software Engineer Interview Questions and Answers

Q1. Explian oops concepts
Add your answer
Q2. Types of waits in selenium
Ans. 
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);
Answered by AI
Add your answer

Q1. Salary dsicussion
Add your answer
Q2. Previous company details
Add your answer

Two Medium DSA problem to solve

Q1. Design scalable Streaming pipeline and
Add your answer

Q1. LLD round , write classes and its methods
Ans. 
Design classes for a simple library management system with methods for adding, borrowing, and returning books.
• Class Book: Attributes include title, author, ISBN, and availability status.

• Class User: Attributes include userID, name, and borrowedBooks (array of Book).

• Class Library: Methods include addBook(Book), borrowBook(User, Book), returnBook(User, Book).

• Example of addBook: library.addBook(new Book('1984', 'George Orw...read more
Answered by AI
Add your answer

Q1. Salary and benefits discussion
Add your answer

2.5 Hours 2 Coding que and sql query and topin tech platform

Q1. Based on boolean matrix
Add your answer
Q2. Find k closest node of given given node in a BST.
Ans. 
Find k closest nodes to a given node in a BST.
• Perform an inorder traversal of the BST to get a sorted list of nodes.

• Use a priority queue to keep track of the k closest nodes based on their absolute difference with the target node.

• Populate the priority queue with the first k nodes from the inorder traversal.

• For each subsequent node, calculate its absolute difference with the target node and compare it with the top eleme...read more
Answered by AI
Add your answer

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
Add your answer
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...read more
Answered by AI
Add your answer
Q3. Explain about compose way of thinking.
Ans. 
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
Answered by AI
Add your answer
Q4. Difference between presenter and viewmodel
Add your answer
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.
Answered by AI
Add your answer

Q1. Polyfills and Logical
Add your answer
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
Answered by AI
Add your answer

Q1. Q1 difference between let and const
Add your answer
Q2. Q2 what are closures?
Add your answer
Q3. Q3. What is typeof null
Ans. 
typeof null returns 'object' in JavaScript.
• typeof null is 'object' in JavaScript

• This is a historical bug in JavaScript that has not been fixed for backward compatibility

• Example: console.log(typeof null) will output 'object'
Answered by AI
Add your answer

Q1. Q1. Find palindrome strings in an array of strings.
Add your answer
Q2. Q2. Explain debouncing with example.
Add your answer

Q1. What is react, diff between react and angular, deep copy shallow copy, hoisting, diff between props and state
Ans. 
React is a JavaScript library for building user interfaces. It is different from Angular in various ways.
• React is a library while Angular is a framework

• React uses virtual DOM while Angular uses real DOM

• React is more flexible and easier to learn than Angular

• Deep copy creates a new object with the same values while shallow copy creates a new reference to the same object

• Hoisting is a JavaScript mechanism where variables a...read more
Answered by AI
Add your answer
Q2. Implement custom hooks and array flat method
Ans. 
Implement custom hooks and array flat method
• Custom hooks are reusable functions that allow you to extract component logic into reusable functions

• Array flat method is used to flatten an array of nested arrays into a single array

• To implement custom hooks, create a function that uses the useState and useEffect hooks

• To implement array flat method, use the reduce method to flatten the array
Answered by AI
Add your answer