Grade 12 Computers Quiz

What is the difference between an abstract class and an interface in Java?

• An abstract class cannot have any methods, while an interface can have both abstract and non-abstract methods.

• An abstract class and an interface are the same thing in Java.

• The main difference is that an abstract class can have both abstract and non-abstract methods, while an interface can only have abstract methods.

• An abstract class can only have abstract methods, while an interface can have both abstract and non-abstract methods.

Explain the concept of method overloading in Java.

• Method overloading is a feature that allows a method to have different return types.

• Method overloading allows a class to have more than one method having the same name and same parameter list.

• Method overloading allows a class to have more than one method having the same name if their parameter lists are different.

• Method overloading is not supported in Java.

What is the purpose of JSP in web development?

• To manage databases in web development.

• To create dynamic web pages with Java technology.

• To design static web pages with HTML technology.

• To create interactive web pages with Python technology.

How do you include a JSP page in another JSP page?

• <% import file='includedPage.jsp' %>

• <% include file='includedPage.jsp' %>

• <%@ import file='includedPage.jsp' %>

• <%@ include file="includedPage.jsp" %>

What are the key features of the Spring framework?

• Java, C++, and Python

• Frontend, Backend, and Fullstack development

• Object-Oriented Programming (OOP), Functional Programming, and Procedural Programming

• Inversion of Control (IoC), Aspect-Oriented Programming (AOP), and Spring MVC are key features of the Spring framework.

Explain the concept of dependency injection in Spring.

• Dependency injection is a design pattern in which a class receives its dependencies from external sources rather than creating them itself.

• Dependency injection is a design pattern in which a class only receives dependencies from internal sources.

• Dependency injection is a design pattern in which a class creates its own dependencies.

• Dependency injection is a design pattern in which a class does not use any dependencies.

Write a SQL query to retrieve all the records from a table named 'employees'.

• DISPLAY employees_data;

• SELECT * FROM employees;

• SHOW employees;

• SELECT * FROM employee_table;

What is the purpose of the Junit testing framework?

• Perform system testing for Java applications

• Perform unit testing for Java applications

• Perform integration testing for Java applications

• Perform regression testing for Java applications

Explain the concept of test fixtures in Junit.

• Test fixtures in JUnit are a set of preconditions that are used to ensure that the test environment is set up properly before the actual test is executed.

• Test fixtures in JUnit are used to clean up the test environment after the test is executed.

• Test fixtures in JUnit are not necessary and can be skipped for most tests.

• Test fixtures in JUnit are only used for debugging purposes.

How do you integrate Junit with Jenkins for continuous integration?

• Install JUnit plugin in Jenkins

• Configure Jenkins to run JUnit tests as part of the build process

• Use a separate tool to integrate JUnit with Jenkins

• Manually run JUnit tests after the build process