Jio Senior Software Developer Interview Questions and Answers

Q1. Streams and all features of Java 8
Ans. 
Java 8 introduced Streams API for processing collections of data in a functional style.
• Streams provide a way to work with sequences of elements in a declarative manner.

• Features include map, filter, reduce, and collect operations.

• Streams can be parallelized to improve performance.

• Example: List<String> names = Arrays.asList("Alice", "Bob", "Charlie"); Stream<String> stream = names.stream();

• Example: int sum = ...read more
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Q2. Basic questions for Spring Boot, like annotation and one question on inner join
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Full stack developer

Q1. Sql performance optimication how to deal
Ans. 
SQL performance optimization involves indexing, query optimization, and database design improvements.
• Use indexes on frequently queried columns to speed up search operations.

• Optimize queries by avoiding unnecessary joins, using appropriate data types, and limiting the number of rows returned.

• Consider denormalizing the database schema for better performance in read-heavy applications.

• Regularly monitor and analyze query p...read more
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Q2. Al tools can be used in net how
Ans. 
Various tools like Visual Studio, ReSharper, Git, and Jira can be used in .NET development.
• Visual Studio is a popular IDE for .NET development

• ReSharper is a code analysis tool that can be used with Visual Studio

• Git is a version control system commonly used in .NET projects

• Jira is a project management tool that can be integrated with .NET development workflows
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Q1. Communication between microservices
Ans. 
Communication between microservices is typically done through APIs, message queues, or event-driven architecture.
• Use RESTful APIs for synchronous communication between microservices

• Implement message queues like RabbitMQ or Kafka for asynchronous communication

• Utilize event-driven architecture with tools like Apache Kafka or AWS SNS/SQS

• Consider gRPC for high-performance communication between microservices
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Q2. Collectionin java
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Q1. How you will takle esculation
Ans. 
I will tackle escalations by first understanding the issue, prioritizing tasks, communicating effectively, and seeking help from senior team members if needed.
• Understand the root cause of the escalation

• Prioritize tasks based on urgency and impact

• Communicate effectively with stakeholders

• Seek help from senior team members if needed
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Q1. Redux and hooks concepts
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Q2. Html5 and css3 concepts
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Q1. Azile methodology and javascript and react advanced concepts
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Q1. Do you know microfrontend
Ans. 
Microfrontend is a software architectural style where a frontend application is decomposed into smaller, more manageable pieces.
• Microfrontend allows teams to work on different parts of the frontend independently.

• Each microfrontend can be developed, tested, and deployed separately.

• Microfrontend architecture helps in scaling large frontend applications.

• Examples of microfrontend frameworks include single-spa, Webpack Modu
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Q2. How to setup env in angular app, pipes asynch pure impure, subject and subject behavior only theory
Ans. 
Setting up environment in Angular app, understanding pipes, async, pure/impure, Subject and BehaviorSubject in theory
• Setting up environment in Angular app involves configuring environment files for different environments like development, production, etc.

• Pipes in Angular are used for transforming data in templates. Async pipes are used for handling asynchronous data streams.

• Pure pipes are stateless and only recompute w...read more
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Q1. What is MVC and explain how it works?
Ans. 
MVC stands for Model-View-Controller, a software design pattern that separates the application into three main components.
• Model: Represents the data and business logic of the application.

• View: Represents the UI components of the application.

• Controller: Acts as an intermediary between Model and View, handling user input and updating the Model accordingly.

• MVC helps in organizing code, improving maintainability, and promo...read more
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Q2. What is Index Fragmentation in SQL
Ans. 
Index fragmentation in SQL occurs when the logical order of pages in an index does not match the physical order in the data file.
• Index fragmentation can lead to decreased query performance as the database engine has to scan more pages to retrieve data.

• Fragmentation can be caused by frequent insertions, deletions, or updates on the indexed columns.

• Rebuilding or reorganizing indexes can help reduce fragmentation and impr...read more
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Q3. Explain about myself
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Q1. About My Company and Project
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Q2. Asked to write SQL query to find the 2nd highest salary of an employee
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Questions from Resume, solving code snippets, DSA Algo

Q1. Explain GCD, Core Data, Higher Order Functions, ARC
Ans. 
GCD, Core Data, Higher Order Functions, ARC are key concepts in iOS development.
• GCD (Grand Central Dispatch) is a technology for managing concurrent operations.

• Core Data is a framework for managing the model layer objects in an application.

• Higher Order Functions are functions that operate on other functions, taking them as arguments or returning them.

• ARC (Automatic Reference Counting) is a memory management technology
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Q2. Weak Unowned, iOS App States
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