PayMate India Senior Software Engineer Interview Questions, Process, and Tips

Coding assessment in Code signal which is vedio proctored

Q1. Design a loan application system
Ans. 
Design a loan application system
• Collect applicant information such as personal details, employment history, and financial information

• Include a credit check process to assess applicant's creditworthiness

• Implement a system for loan approval/rejection based on set criteria

• Provide options for different types of loans and repayment plans

• Ensure security measures are in place to protect applicant's sensitive information
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Bank account creation, deposit money, withdraw money

Q1. Question around work experience and how a particular scenario or situation is handled
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Suggest system cost optimization based on given data set

Q1. Does Java support pass by reference?
Ans. 
Yes
• Java uses pass by value for all variables, including object references.

• When an object reference is passed as an argument, a copy of the reference is passed, not the actual object.

• Modifying the reference inside the method will not affect the original reference outside the method.

• However, modifications to the object's state inside the method will be visible outside the method.
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Q2. Explain Singleton Pattern
Ans. 
Singleton pattern restricts the instantiation of a class to a single object.
• Singleton pattern ensures that only one instance of a class exists throughout the application.

• It provides a global point of access to the instance.

• Commonly used in scenarios where a single instance needs to coordinate actions across the system.

• Example: Database connection manager, logger, configuration manager.
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Hacker earth , Rest api consuming and filtering response . 2 question

Q1. L1 Technical of 1 hour - Java , Spring Boot, OOPs
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Q2. JAVA 8 Features , OOPs Concept
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Q1. L2 technical , design , puzzle
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Q1. With CTO , recent projects , puzzle
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Q1. Directly discussion on expected
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Javascript,html, CSS and MySQL

Q1. Basic NodeJs and MySQL questions,scenario-based technical questions and basic interview questions
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Q2. What is an event loop, The second highest from the table
Ans. 
An event loop is a programming construct that waits for and dispatches events or messages in a program.
• Event loop is commonly used in asynchronous programming to handle tasks like I/O operations without blocking the main thread.

• It continuously checks for events in a queue and processes them one by one.

• Examples of event loops include Node.js event loop for handling asynchronous operations in JavaScript.

• Event loop helps ...read more
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Q1. Basic nodejs and SQL queries question
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Q1. Basic interview question and technology based
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70 mins 4 topics, 1/2 easy, 3 would be easy+, need detail orientation, 4 would be medium,

Easy case study, code review and find the bug

DSA coding round.
Graph based question, dp question.

Q1. 1. design service to download big file
Ans. 
Design a service to download large files.
• Use a scalable architecture to handle large file downloads.

• Implement resumable downloads to handle network interruptions.

• Use parallel downloading to speed up the download process.

• Implement authentication and authorization to ensure security.

• Provide progress updates to the user during the download process.
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Q1. Java based questions Spring beans
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