Paytm Payments Bank Associate Interview Questions and Answers

They will share one link .. in that we have few multiple choise questions and 3 coding problems. one java, one HTML and one SQL

Q1. Hibernate type of caches ?
Ans. 
Hibernate supports two types of caches: Level 1 (session) cache and Level 2 (SessionFactory) cache.
• Level 1 cache is associated with the session object and is enabled by default.

• Level 2 cache is shared across sessions and requires configuration.

• Level 2 cache can be implemented using various providers like Ehcache, Infinispan, Hazelcast, etc.
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Q2. How to implement REST API (steps)?
Ans. 
To implement REST API, follow these steps:
• Define the resources and their URIs

• Define the HTTP methods (GET, POST, PUT, DELETE)

• Implement the methods using a programming language

• Test the API using tools like Postman

• Document the API using tools like Swagger
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Q3. Transaction Management in springboot?
Ans. 
Spring Boot provides transaction management support through the use of @Transactional annotation.
• Spring Boot uses the @Transactional annotation to manage transactions.

• The @Transactional annotation can be applied to methods or classes.

• Spring Boot supports both programmatic and declarative transaction management.

• Programmatic transaction management involves using the TransactionTemplate class.

• Declarative transaction manag...read more
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Q4. CrudRepository v/s JpaRepository ?
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Q5. What is n+1 issue in hybernate ?
Ans. 
n+1 issue in Hibernate refers to the problem of excessive database queries being executed due to lazy loading.
• Occurs when a query fetches an entity and its associated entities one at a time instead of all at once

• Can be solved by using eager loading or batch fetching

• Can also be solved by using a join fetch query

• Can lead to performance issues and slow down the application
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Q6. Write small code using @OneToMany and @ManyToOne ?
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Example code using @OneToMany and @ManyToOne annotations
• Create two entities, one with @OneToMany and the other with @ManyToOne annotation

• Use mappedBy attribute in @OneToMany to specify the relationship

• Use joinColumn attribute in @ManyToOne to specify the foreign key column

• Example: User has many Posts, Post belongs to one User
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Q1. HR will discuss about your Salary and other things ?
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Haker rank,..........,...........

Q1. Ds alogortithns,........
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Q1. Complete Unix sql Java
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Q2. Sql basics and Unix
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Q3. Unix basics and commands
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Q1. Question on REST architecture and Java
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Q2. Find output of java programs
Ans. 
Java programs output can be determined by running the code and observing the console or log files.
• Compile the Java code using a compiler like javac

• Run the compiled code using the Java Virtual Machine (JVM)

• Observe the output in the console or log files

• Output can be text, numbers, or other data types
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Q1. Basics of Spring Framework
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Q2. Java 8 Features and uses
Ans. 
Java 8 introduced several new features including lambda expressions, streams, and functional interfaces.
• Lambda expressions allow for functional programming and simplify code

• Streams provide a way to process collections of data in a functional way

• Functional interfaces allow for the use of lambda expressions

• Default methods allow for adding methods to interfaces without breaking existing implementations

• Date and time API im
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Q3. Streams and their applications
Ans. 
Streams are a sequence of data elements that can be processed in parallel or sequentially. They are used in various applications.
• Streams are used for data processing, such as filtering, mapping, and reducing.

• They are also used for I/O operations, such as reading and writing files or network sockets.

• Streams can be parallelized to improve performance on multi-core systems.

• Examples of stream-based APIs include Java 8 Stre
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Q4. Find second largest number using stream
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Using stream, find the second largest number.
• Sort the stream in descending order and return the second element.

• Use the reduce() method to compare and find the second largest number.

• Create a priority queue and add elements to it. Pop the second largest element from the queue.
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Q1. Spring Boot features and uses
Ans. 
Spring Boot is a framework for building standalone, production-grade Spring-based applications.
• Provides a simplified way to create Spring applications with minimal configuration

• Includes an embedded Tomcat, Jetty or Undertow server for easy deployment

• Supports auto-configuration, which automatically configures Spring based on dependencies

• Offers a wide range of starter dependencies for common use cases

• Enables easy integra...read more
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Q2. Questions on previous projects and technical challenges
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Q1. Salary structure and benefits were explained
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Q1. Tell me about yourself
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Q1. What is selenium
Ans. 
Selenium is an open-source automation testing tool used for web application testing.
• Selenium supports multiple programming languages like Java, Python, C#, etc.

• It can automate web browsers like Chrome, Firefox, Safari, etc.

• Selenium can perform various testing types like functional, regression, and load testing.

• It can also interact with web elements like buttons, text fields, etc.

• Selenium can be integrated with other to...read more
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Q1. What is UAT testing
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UAT testing is the process of testing a software application by the end-users to ensure its usability, functionality, and compatibility.
• UAT stands for User Acceptance Testing

• It is the final phase of testing before the software is released to the market

• It is performed by the end-users to ensure that the software meets their requirements

• It focuses on the usability, functionality, and compatibility of the software

• It helps...read more
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