Paytm Money Sdet Engineer Interview Questions and Answers

Q1. Merge two sorted arrays
Ans. 
Merging two sorted arrays into a single sorted array
• Create a new array to store the merged result

• Iterate through both arrays simultaneously, comparing elements and adding the smaller one to the result array

• Handle cases where one array is longer than the other by appending the remaining elements
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Q2. Put patch and post in api testing
Ans. 
Patch and post are HTTP methods used in API testing to update and create resources, respectively.
• PATCH method is used to update an existing resource in the API

• POST method is used to create a new resource in the API

• Both methods are commonly used in RESTful APIs for CRUD operations

• Example: PATCH /api/users/123 to update user with ID 123

• Example: POST /api/users to create a new user
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Q3. Explain your automation framework
Ans. 
My automation framework is a data-driven framework using Selenium WebDriver and TestNG for test execution and reporting.
• Uses Selenium WebDriver for interacting with web elements

• Utilizes TestNG for test execution and reporting

• Follows a data-driven approach for test data management
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Merge 2 unsorted array

Selenium automation framework
Redt assured automation framework

Asked spiral matrix question and some map related questions and optimise the approach

Q1. Asked to automate ui of the provided screen and backed framework of api testing Asked about the project and related questions
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Q1. Asked about payment gateway related questions and how to deal with it
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JAVA,SQL,Testing Parameters

Q1. Concept of oops
Ans. 
Object-oriented programming paradigm that focuses on objects and classes for code organization and reusability.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

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

• Polymorphism: Ability to present the same interface for different data types
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Q2. Code to move 0's to extreme right position
Ans. 
Code to move 0's to extreme right position in an array of strings
• Iterate through the array and move all 0's to the end of the array

• Use two pointers approach to swap elements

• Example: Input array ['1', '0', '3', '0', '5'], Output array ['1', '3', '5', '0', '0']
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Q1. OOps,Hashmaps,Concept of Polymophism,Inheritance etc.
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Q2. Java collections
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Q1. Basic personality review and your past carrer experience. Since i was a campus candidate they asked me about working in my college projects.
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Round duration - 60 Minutes
Round difficulty - Medium

Normal intro followed by 1 DSA question

Q1. Alien Dictionary
Ninja is learning a new but strange language known as Alien Language. Alien language possesses the same alphabets as of English language, but their order is different. The order of letters...read more
Ans. 
The task is to check whether the given words are sorted lexicographically in an alien language.
• Read the number of test cases

• For each test case, read the number of words, the words themselves, and the order string

• Check if the words are sorted lexicographically based on the given order string

• Print 'YES' if the words are sorted, else print 'NO'
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Round duration - 60 Minutes
Round difficulty - Easy

This round was based on checking the knowledge on component breaking of any web page and data flow

Q1. System Design Question
Discuss the components breakdown of the play store home page.
Ans. 
The play store home page consists of various components that provide a user-friendly interface for browsing and discovering apps.
• Header section displaying the app logo, search bar, and navigation options

• Featured apps section showcasing popular or recommended apps

• Categories section for browsing apps based on different genres

• Top charts section displaying the most downloaded or highest-rated apps

• New releases section highl...read more
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Round duration - 60 minutes
Round difficulty - Easy

This round was focused on how the developer is going to contribute to designing the better user experience

Q1. System Design Question
Design the wireframe of ledger management user interface
Ans. 
Design a wireframe for a ledger management user interface.
• Include a navigation bar for easy access to different sections of the ledger

• Design a table layout to display the ledger entries with columns for date, description, debit, credit, and balance

• Add filters and search functionality to easily find specific entries

• Include options to add, edit, and delete ledger entries

• Consider adding visual indicators for different typ...read more
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1st Round.
Two DS problem from leetcode.
1.Array next permutation
2. Max share profit

Q1. OOPS, Threads, System Design
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