Infosys Assistant Software Developer Interview Questions and Answers

Yes, OOPs concepts are fundamental to object-oriented programming and include inheritance, encapsulation, abstraction, and polymorphism.

• Inheritance allows a class to inherit properties and methods from a parent class.

• Encapsulation is the practice of hiding data and methods within a class to prevent direct access.

• Abstraction is the process of simplifying complex systems by breaking them down into smaller, more manageabl...read more

I have used database systems extensively in my projects.

• Designed and implemented database schema for various applications

• Used SQL queries to retrieve and manipulate data

• Integrated databases with web applications using ORM frameworks like Hibernate

• Optimized database performance by indexing and query optimization

• Implemented data migration scripts to move data between databases

• Used NoSQL databases like MongoDB for scalabl

Query to retrieve a particular value from data

• Identify the table and column where the value is stored

• Use SELECT statement with WHERE clause to filter the data

• Specify the value to retrieve in the SELECT statement

Networking is the practice of connecting devices together to share resources and information.

• Networking involves the use of hardware and software to connect devices together.

• It allows for the sharing of resources such as printers and files.

• Networking also enables communication between devices, such as sending emails or accessing websites.

• Examples of networking technologies include Ethernet, Wi-Fi, and Bluetooth.

We used a variety of technologies including Java, Spring Boot, React, and MySQL.

• Java was used for the backend development

• Spring Boot was used to create RESTful APIs

• React was used for the frontend development

• MySQL was used as the database management system

Server and client are two entities in a client-server architecture where the server provides services to the client.

• Server is a computer program or device that provides services to other computer programs or devices, known as clients.

• Client is a computer program or device that requests services from a server.

• Examples of servers include web servers, mail servers, and file servers.

• Examples of clients include web browsers

The HashMap class is used to represent key-value pairs in Java.

• HashMap is a part of the Java Collections Framework.

• It allows null values and only one null key.

• It provides constant-time performance for basic operations like get and put.

• Example: HashMap map = new HashMap<>();

Abstraction is the process of simplifying complex systems by focusing on essential details and hiding unnecessary complexities.

• Abstraction allows us to create models or representations of real-world objects or systems in software.

• It helps in managing complexity by breaking down a system into smaller, more manageable parts.

• Abstraction provides a level of indirection, allowing changes to be made in one part of the system...read more

try-catch is used in Java to handle exceptions and prevent program crashes.

• try-catch blocks are used to catch and handle exceptions that may occur during program execution.

• It allows the program to gracefully handle errors and prevent the program from crashing.

• The try block contains the code that may throw an exception, and the catch block handles the exception.

• Multiple catch blocks can be used to handle different types...read more

The statement to use for selecting based on integer inputs is the 'switch' statement.

• The 'switch' statement allows for multiple cases to be evaluated based on the value of an integer input.

• Each case represents a possible value of the input, and the corresponding code block is executed if the value matches.

• The 'switch' statement also provides a 'default' case which is executed if none of the cases match the input value.

• ...read more

Web wrapping is the process of displaying a website within another website or application.

• It involves embedding a website within an iframe or a div element.

• Web wrapping is commonly used in mobile apps to display web content without leaving the app.

• It can also be used to display content from a different domain on a website.

• Web wrapping can be done using JavaScript or server-side scripting languages.

• Examples of web wrapp...read more

VBA effects on software development

• VBA can automate repetitive tasks in software development

• VBA can be used to create custom functions and add-ins in Excel

• VBA can interact with other Microsoft Office applications

• VBA can be used to create user interfaces for data entry and analysis

• VBA can be used to manipulate data in databases

• VBA can be used to create macros in software applications