Caterpillar Inc Interview Questions and Answers

Sanity testing is a subset of regression testing that quickly checks if the major functionalities of the software are working as expected.

• Sanity testing is performed after a software build to ensure its basic functionality is intact.

• It focuses on testing the critical features and functionalities of the software.

• It is a quick and shallow form of testing to determine if further testing is required.

• Sanity testing is not exhaustive and does not cover all possible test cases.

• It he...read more

Automation testing is the use of software tools to execute test cases and compare actual outcomes with expected outcomes.

• Automation testing involves writing scripts or using tools to automate repetitive tasks.

• It helps in reducing human errors and increases efficiency.

• It is used to test software applications, websites, and systems.

• Examples of automation testing tools include Selenium, Appium, and JUnit.

OOPs concepts are the fundamental principles of Object-Oriented Programming that help in designing and implementing software systems.

• Encapsulation: Wrapping data and methods into a single unit

• Inheritance: Acquiring properties and behavior of a parent class

• Polymorphism: Ability of objects to take on multiple forms

• Abstraction: Hiding implementation details and showing only functionality

• Examples: Java, C++, Python, Ruby

Regression testing is the process of testing changes made to a software application to ensure that existing functionality still works.

• It is performed after making changes to the software application

• It ensures that existing functionality is not affected by the changes

• It helps to identify any new defects introduced by the changes

• It can be automated to save time and effort

• Examples include testing after bug fixes, new feature additions, and software upgrades

Access specifier defines the scope of a class member.

• Access specifiers are public, private, and protected.

• Public members can be accessed from anywhere.

• Private members can only be accessed within the class.

• Protected members can be accessed within the class and its subclasses.

• Access specifiers help in encapsulation and data hiding.

Agile methodology is an iterative approach to software development that emphasizes flexibility and customer satisfaction.

• Agile methodology values individuals and interactions over processes and tools

• It emphasizes working software over comprehensive documentation

• It involves frequent collaboration with customers and stakeholders

• It allows for changes and adjustments to be made throughout the development process

• Examples of agile methodologies include Scrum, Kanban, and Extreme Pr...read more