DigiSprint Solutions Senior Software Developer Interview Questions and Answers for Experienced

Q1. Explain react life cycle
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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
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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
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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?
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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
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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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Q1. What Micro services design pattern used
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The microservices design pattern used is the API Gateway pattern.
• API Gateway pattern is used to provide a single entry point for clients to access multiple microservices.

• It helps in routing requests, load balancing, authentication, and monitoring.

• Examples include Netflix Zuul and Amazon API Gateway.
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Q2. Spring boot project internal working
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Q1. Hash map internal working
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Hash map is a data structure that stores key-value pairs and uses a hash function to map keys to their corresponding values.
• Hash map uses a hash function to determine the index of the key-value pair in the underlying array.

• Collisions can occur when multiple keys hash to the same index, which can be resolved using techniques like chaining or open addressing.

• Hash maps have O(1) average time complexity for insertion, dele
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Q1. What is entity framework
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Entity Framework is an ORM (Object-Relational Mapping) framework for .NET applications.
• ORM framework for .NET applications

• Maps database tables to classes in code

• Provides a way to query and manipulate data using LINQ

• Supports various database providers such as SQL Server, MySQL, etc.
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Q2. What is CTE in SQL
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CTE stands for Common Table Expression in SQL, used to create temporary result sets that can be referenced within a query.
• CTEs are defined using the WITH keyword

• They can be recursive or non-recursive

• CTEs improve readability and maintainability of complex queries

• Example: WITH cte AS (SELECT * FROM table_name) SELECT * FROM cte
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Q1. What are solid principles
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SOLID principles are a set of five design principles for writing maintainable and scalable object-oriented code.
• Single Responsibility Principle (SRP) - a class should have only one reason to change

• Open/Closed Principle (OCP) - classes should be open for extension but closed for modification

• Liskov Substitution Principle (LSP) - objects of a superclass should be replaceable with objects of its subclasses without affectin...read more
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Q2. What are design patterns
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Design patterns are reusable solutions to common problems in software design.
• Design patterns provide a template for solving recurring design problems in software development.

• They help in making code more maintainable, scalable, and efficient.

• Examples include Singleton, Factory, Observer, and Strategy patterns.
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Q1. Why you would like to join company
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Q2. Why shouild we select you
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Core java , colletions

Q1. Basic Java topics
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Q2. System design topics
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