Java Application Lifecycle and Annotations MCQs Questions

1

What is the purpose of the `@WebServlet` annotation in a Java web application?

A) To declare a servlet and its mapping B) To define JavaBean properties C) To execute SQL queries D) To create JavaBeans

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Answer & Solution

Answer: Option A

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2

In a Java web application, what is the role of the `ServletContext` object?

A) It creates JavaBeans B) It executes SQL queries C) It defines JavaBean properties D) It provides access to application-wide information and resources

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Answer & Solution

Answer: Option D

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3

What is the primary purpose of the `@PostConstruct` annotation in Java EE applications?

A) To define JavaBean properties B) To execute SQL queries C) To specify a method to be executed after an instance is created and its dependencies are injected D) To create JavaBeans

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Answer & Solution

Answer: Option C

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4

In Java EE applications, what is the purpose of the `@Resource` annotation?

A) To execute SQL queries B) To specify a resource to be injected into a component C) To create JavaBeans D) None of These

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Answer & Solution

Answer: Option B

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5

What is the `web.xml` deployment descriptor used for in a Java web application?

A) To create JavaBeans B) To execute SQL queries C) To configure web application settings and servlet mappings D) To define JavaBean properties

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Answer & Solution

Answer: Option C

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6

In a Java web application, what is the purpose of the `@WebListener` annotation?

A) To define JavaBean properties B) To execute SQL queries C) To create JavaBeans D) To declare a listener class for various events in the web application

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Answer & Solution

Answer: Option D

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7

What is the role of the `ServletContextListener` interface in Java web applications?

A) To listen for context initialization and destruction events B) To define JavaBean properties C) To execute SQL queries D) To create JavaBeans

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Answer & Solution

Answer: Option A

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8

Which annotation is used to specify that a method should be invoked after a session is invalidated in a Java web application?

A) `@WebListener` B) `@Resource` C) `@PostConstruct` D) `@PreDestroy`

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Answer & Solution

Answer: Option D

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9

What is the purpose of the `@PreDestroy` annotation in Java EE applications?

A) To define JavaBean properties B) To execute SQL queries C) To specify a method to be executed before an instance is removed by the container D) To create JavaBeans

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Answer & Solution

Answer: Option C

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10

In a Java EE application, what is the role of the `@EJB` annotation?

A) To execute SQL queries B) To inject an EJB (Enterprise JavaBean) component C) To create JavaBeans D) None of These

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Answer & Solution

Answer: Option B

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Java Application Lifecycle and Annotations MCQs Questions | Java Program MCQs