Berger Paints Interview Questions and Answers

A string literal is a sequence of characters enclosed in double quotes. One object is created on string initialization.

• String literals are used to represent constant values that cannot be modified.

• The object created on string initialization is stored in the string pool.

• String literals can be concatenated using the '+' operator.

• Example: String str = "Hello World";

Threading is a way of achieving multitasking in a single process by dividing it into smaller threads.

• Threads are lightweight processes that share the same memory space.

• They can run concurrently and independently of each other.

• Threading can improve performance by utilizing multiple CPU cores.

• Examples of threading include GUI applications, web servers, and video games.

Smoke testing checks basic functionality; sanity testing verifies specific functionalities after changes.

• Smoke testing is a preliminary test to check the basic functionality of an application.

• Sanity testing is a subset of regression testing focused on specific functionalities after changes.

• Example of smoke testing: Verifying that the application launches and the main features are accessible.

• Example of sanity testing: Checking if a newly implemented feature works correctly aft...read more

Waterfall is a linear approach, while Agile is iterative and flexible, focusing on collaboration and customer feedback.

• Waterfall follows a sequential design process: requirements, design, implementation, verification, maintenance.

• Agile promotes iterative development, allowing for changes based on feedback after each iteration.

• In Waterfall, all requirements are gathered upfront; in Agile, requirements evolve through collaboration.

• Waterfall is best for projects with well-define...read more

JVM stands for Java Virtual Machine. It is an abstract machine that enables a computer to run Java programs.

• JVM is responsible for interpreting the compiled Java code and executing it on the computer.

• It provides a platform-independent environment for Java programs to run on different operating systems.

• JVM has several components such as class loader, bytecode verifier, interpreter, and just-in-time compiler.

• Class loader loads the Java class files into the memory.

• Bytecode verif...read more

Lambda is a feature introduced in Java 8 that allows functional programming.

• Lambda is a concise way to represent a method as an expression.

• It enables functional programming by allowing functions to be passed as arguments.

• It reduces boilerplate code and makes code more readable.

• Example: (x, y) -> x + y is a lambda expression that adds two numbers.

Regression testing ensures that new code changes do not adversely affect existing functionalities.

• Verifies that recent code changes haven't introduced new bugs.

• Can be automated to save time and increase efficiency.

• Example: After adding a new feature, testing existing features to ensure they still work.

• Often performed after bug fixes or enhancements.

• Includes both manual and automated testing approaches.

Agile is an iterative software development process emphasizing flexibility, collaboration, and customer feedback.

• Focuses on delivering small, incremental updates to software.

• Encourages collaboration between cross-functional teams, such as developers and testers.

• Utilizes time-boxed iterations called sprints, typically lasting 1-4 weeks.

• Incorporates regular feedback loops through sprint reviews and retrospectives.

• Examples include Scrum and Kanban methodologies.