Donyati Interview Questions and Answers

Types of keys include primary keys, foreign keys, unique keys, and composite keys.

• Primary key: uniquely identifies each record in a table, must be unique and not null.

• Foreign key: links two tables together, enforces referential integrity.

• Unique key: ensures that all values in a column are unique.

• Composite key: combination of two or more columns to uniquely identify a record.

Functional testing focuses on the specific functionality of the software, while non-functional testing focuses on performance, usability, and security.

• Functional testing ensures that the software functions as expected based on the requirements.

• Non-functional testing evaluates aspects like performance, usability, reliability, and security.

• Examples of functional testing include unit testing, integration testing, and system testing.

• Examples of non-functional testing include load...read more

Regression testing is testing the entire application after changes, while retesting is testing a specific bug fix.

• Regression testing is done to ensure that new code changes do not affect existing functionality.

• Retesting is done to verify that a specific bug or issue has been fixed.

• Regression testing involves testing the entire application, while retesting focuses on a specific area.

• Examples: After adding a new feature, regression testing is done to check if existing features ...read more

Selenium is a popular open-source tool used for automating web browsers.

• Selenium is used for automating web browsers to test web applications.

• It supports multiple programming languages like Java, Python, C#, etc.

• Selenium WebDriver is the most commonly used component for writing automation scripts.

• Selenium Grid allows running tests on different machines in parallel.

• Selenium IDE is a record and playback tool for creating simple automation scripts.

Agile is iterative and flexible, while waterfall is sequential and rigid.

• Agile involves continuous feedback and adaptation, while waterfall follows a linear approach.

• Agile allows for changes throughout the development process, while waterfall requires detailed planning upfront.

• Agile is better suited for projects with evolving requirements, while waterfall is ideal for projects with fixed requirements.

• Agile promotes collaboration and communication among team members, while wat...read more

Testing the functionality of an ATM machine by simulating various scenarios

• Test withdrawing money within account balance

• Test withdrawing money exceeding account balance

• Test depositing money into account

• Test checking account balance

• Test entering invalid PIN

• Test inserting damaged card