Test Yantra Software Solutions Software Developer Interview Questions and Answers

Use GROUP BY clause in MSSQL to group data based on a specific column.

• Use GROUP BY followed by the column you want to group by

• Can be used with aggregate functions like COUNT, SUM, AVG, etc.

• Example: SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name

SDLC process test involves testing the software at various stages of the software development life cycle.

• Testing is done at each stage of SDLC - requirements, design, implementation, and maintenance.

• It helps in identifying defects early in the development process.

• Types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Testing ensures that the software meets the specified ...read more

Object-Oriented Programming (OOP) principles are essential for software development, enhancing code reusability and maintainability.

• Encapsulation: Bundling data and methods that operate on the data within one unit, e.g., a class in Java.

• Inheritance: Creating new classes based on existing ones, e.g., a 'Dog' class inheriting from an 'Animal' class.

• Polymorphism: Allowing methods to do different things based on the o...read more

A View is a virtual table created by a query that can be used to retrieve and display data from one or more tables.

• A View is not a physical table, but rather a result set of a stored query.

• Views can simplify complex queries by storing them as a reusable object.

• Views can also provide an additional layer of security by restricting access to certain columns or rows.

• Examples: 'CREATE VIEW vw_employee AS SELECT * FROM ...read more

DevOps architecture is a set of practices that combines software development (Dev) and IT operations (Ops) to shorten the systems development life cycle.

• DevOps architecture focuses on collaboration, automation, and monitoring throughout the software development lifecycle.

• It aims to increase the speed of software delivery, improve reliability, and build scalable systems.

• Examples of DevOps tools include Jenkins, Doc...read more

Event loop is a mechanism in programming that allows for asynchronous execution of code by continuously checking for events and executing associated callbacks.

• Event loop is commonly used in JavaScript to handle asynchronous operations.

• It continuously checks the call stack for any pending tasks and executes them in a non-blocking manner.

• Event loop allows for efficient handling of I/O operations without blocking the...read more

View defines the user-interface by determining how data is presented to the user.

• View is responsible for displaying data and receiving user input.

• It includes elements like buttons, text fields, and images.

• Views can be designed using XML layouts in Android development.

• Views can be styled using CSS in web development.