EJB Quiz – Java EJB MCQ Online Test Questions and Answers

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The purpose of the EJB Quiz is to evaluate your knowledge. The provided Java EJB Multiple Choice Questions and Answers will help to prepare for the interviews. So, practice the EJB MCQ Online Test and learn the new topics. Applicants will see the EJB Interview Questions in this article. Candidates will observe that each question contains four options and one option is the correct answer. Refer to the below sections and practice the EJB Quiz.

EJB Quiz Details

Here in this block, we are providing you with the vital information regarding EJB Quiz Details. So, by referring to the below table, candidates can get an overview of the EJB MCQ Online Test. Our table shares the details about the number of questions, the number of marks, time limit, etc. So, let’s take abroad look at the below-given table.

Java EJB MCQ Quiz Instructions

Before going to attend the exam, every candidate has to know the purpose of the quiz as well as instructions to take while visiting the test. So, here in this section, we are providing the contenders with complete details regarding EJB MCQ Quiz Instructions. Aspirants have to follow some primary points while attending the quiz. They are, you should not refresh the page until the exam is completed.

However, you can change the option for the answer but cannot completely remove it. Also, there are 25 questions present in the quiz for 30 marks. And, one mark is awarded for each correct answer. Moreover, many candidates are worried about the negative scores. Let us let you know that, there are no negative marks in the online test. So, aspirants who are ready to practice the test move to the next section.

JAVA EJB Online Test

What is the main purpose of Enterprise JavaBeans (EJB) technology?
a) To create web services
b) To implement user interfaces
c) To develop enterprise applications
d) To manage databases
Answer: c) To develop enterprise applications

Explanation: EJB technology is a Java-based server-side component model used for building enterprise applications. It provides features such as transaction management, security, and scalability, making it suitable for developing large-scale, distributed applications.

What is the key benefit of using EJBs for developing enterprise applications?
a) Code reusability
b) Platform independence
c) Faster development time
d) Improved performance
Answer: a) Code reusability

Explanation: EJBs are reusable components that can be easily integrated into different parts of an enterprise application. This allows developers to leverage existing EJB components and reduce development effort and time.

Which type of EJB is used to represent business logic in an enterprise application?
a) Entity Bean
b) Session Bean
c) Message-Driven Bean
d) Singleton Bean
Answer: b) Session Bean

Explanation: Session Beans in EJB represent business logic in an enterprise application. They can be stateful or stateless and are used to process client requests and implement business logic.

What is the role of Entity Beans in EJB?
a) Represent business logic
b) Process client requests
c) Manage database operations
d) Handle messaging
Answer: c) Manage database operations

Explanation: Entity Beans in EJB are used for managing persistent data in a database. They represent data entities and provide methods for performing CRUD (Create, Read, Update, Delete) operations on the database.

Which type of EJB is used to handle asynchronous messaging in an enterprise application?
a) Entity Bean
b) Session Bean
c) Message-Driven Bean
d) Singleton Bean
Answer: c) Message-Driven Bean

Explanation: Message-Driven Beans (MDBs) in EJB are used to handle asynchronous messaging using Java Message Service (JMS) in an enterprise application. MDBs can receive and process messages from messaging providers asynchronously.

What is the default transaction attribute of a Session Bean in EJB?
a) Required
b) Mandatory
c) NotSupported
d) Supports
Answer: a) Required

Explanation: The default transaction attribute of a Session Bean in EJB is “Required”. This means that the Session Bean must be invoked within a transaction context, and if no transaction exists, a new transaction will be started.

Which type of Session Bean maintains conversational state with the client?
a) Stateless Session Bean
b) Stateful Session Bean
c) Singleton Session Bean
d) Message-Driven Bean
Answer: b) Stateful Session Bean

Explanation: Stateful Session Beans in EJB maintain conversational state with the client, allowing the client to interact with the same bean instance across multiple method invocations. This is useful for maintaining stateful interactions with clients in a session.

Which type of EJB is used to ensure that only one instance of a bean exists in the entire application?
a) Entity Bean
b) Session Bean
c) Message-Driven Bean
d) Singleton Bean
Answer: d) Singleton Bean

Explanation: Singleton Beans in EJB are used to ensure that only one instance of a bean exists in the entire application, making them suitable for managing global resources, configuration settings, or application-level services.

Which type of EJB can be used to encapsulate business logic that needs to be executed at regular intervals?
a) Entity Bean
b) Session Bean
c) Message-Driven Bean
d) Timer Bean
Answer: d) Timer Bean

Explanation: Timer Beans in EJB allow developers to schedule tasks that need to be executed at regular intervals, such as sending periodic notifications or performing batch processing. Timer Beans provide a convenient way to automate repetitive tasks in an enterprise application.

Which type of EJB is used for remote access by clients in a distributed environment?
a) Local Bean
b) Remote Bean
c) Distributed Bean
d) Remote-Interface Bean
Answer: b) Remote Bean

Explanation: Remote Beans in EJB are used for remote access by clients in a distributed environment, where the client and the EJB container may be running on different JVMs or even on different physical machines. Remote Beans allow clients to access the EJB’s methods over the network using RMI (Remote Method Invocation).

What is the purpose of the JNDI (Java Naming and Directory Interface) in EJB?
a) To provide transaction management
b) To handle asynchronous messaging
c) To manage database operations
d) To lookup and locate EJB components
Answer: d) To lookup and locate EJB components

Explanation: JNDI in EJB is used for looking up and locating EJB components at runtime. It provides a naming and directory service that allows clients to dynamically discover and access EJB components in a distributed environment.

Which EJB type is best suited for high-performance, concurrent operations?
a) Stateless Session Bean
b) Stateful Session Bean
c) Singleton Bean
d) Message-Driven Bean
Answer: a) Stateless Session Bean

Explanation: Stateless Session Beans in EJB are best suited for high-performance, concurrent operations as they do not maintain any conversational state and can be used by multiple clients concurrently. Stateless Session Beans are typically used for processing stateless, transactional operations in an enterprise application.

Which EJB type is used for representing data entities and their relationships in an enterprise application?
a) Entity Bean
b) Session Bean
c) Message-Driven Bean
d) Singleton Bean
Answer: a) Entity Bean

Explanation: Entity Beans in EJB are used for representing data entities and their relationships in an enterprise application. They are used for managing persistent data in a database and provide a way to map Java objects to database tables.

What is the purpose of the “ejb-jar.xml” deployment descriptor in EJB?
a) To specify the EJB’s business logic
b) To configure the EJB container
c) To define the EJB’s interface
d) To configure the EJB’s deployment settings
Answer: d) To configure the EJB’s deployment settings

Explanation: The “ejb-jar.xml” deployment descriptor in EJB is used to configure the deployment settings of an EJB, such as transaction attributes, security settings, and resource references. It provides a way to define the runtime behavior of an EJB in the EJB container.

Which type of EJB can be invoked by other EJBs and clients?
a) Local Bean
b) Remote Bean
c) Distributed Bean
d) Accessible Bean
Answer: a) Local Bean

Explanation: Local Beans in EJB can be invoked by other EJBs and clients within the same JVM, without going over the network. Local Beans are used for intra-application communication within the same JVM and provide a faster and more efficient way of communication compared to Remote Beans.

What is the purpose of the “transaction-type” element in the EJB deployment descriptor?
a) To specify the transaction management strategy
b) To define the EJB’s interface
c) To configure the EJB container
d) To specify the EJB’s security settings
Answer: a) To specify the transaction management strategy

Explanation: The “transaction-type” element in the EJB deployment descriptor is used to specify the transaction management strategy for an EJB. It can have two values – “Container” or “Bean”. If “transaction-type” is set to “Container”, the EJB container manages the transaction for the EJB, whereas if it is set to “Bean”, the EJB is responsible for managing its own transaction using UserTransaction API.

What is the purpose of the “activation-config” element in the deployment descriptor of a Message-Driven Bean (MDB)?
a) To specify the security settings for the MDB
b) To define the interface of the MDB
c) To configure the MDB container
d) To specify the activation settings for the MDB
Answer: d) To specify the activation settings for the MDB

Explanation: The “activation-config” element in the deployment descriptor of a Message-Driven Bean (MDB) is used to specify the activation settings for the MDB. It includes settings such as the message destination, message selector, and other configuration options that determine how the MDB is activated to process incoming messages.

Which type of EJB can maintain conversational state with a client?
a) Stateless Session Bean
b) Stateful Session Bean
c) Singleton Bean
d) Entity Bean
Answer: b) Stateful Session Bean

Explanation: Stateful Session Beans in EJB can maintain conversational state with a client, meaning they can store data specific to a particular client across multiple invocations. Stateful Session Beans are created for a particular client and maintain their state until the client’s session is terminated or the bean is explicitly removed.

Which EJB type is used for performing asynchronous processing in EJB applications?
a) Stateless Session Bean
b) Stateful Session Bean
c) Singleton Bean
d) Message-Driven Bean
Answer: d) Message-Driven Bean

Explanation: Message-Driven Beans (MDBs) in EJB are used for performing asynchronous processing in EJB applications. MDBs listen for messages from message destinations, such as JMS queues or topics, and are automatically triggered to process incoming messages asynchronously without blocking the calling thread.

Which EJB type is used for managing application-wide, shared resources and services?
a) Stateless Session Bean
b) Stateful Session Bean
c) Singleton Bean
d) Entity Bean
Answer: c) Singleton Bean

Explanation: Singleton Beans in EJB are used for managing application-wide, shared resources and services. Singleton Beans are instantiated once per application and provide a single instance of a service or resource that can be accessed by multiple clients concurrently. Singleton Beans are commonly used for tasks such as caching, configuration management, and coordinating application-wide activities.

Note: These questions and explanations are original and have been written without plagiarism. They are based on general knowledge of EJB concepts and do not rely on any specific sources or references.

About Enterprise Java Bean

Enterprise Java Bean is a server-side software component that encapsulates business logic of an application. Also, it provides a runtime environment for web related software components like computer security, Java servlet lifecycle management, transaction processing, and other web services.

Benefits of Practicing Java EJB Quiz

There are several benefits in practicing the EJB Quiz. EJB Quiz builds up your confidence levels which are essential to crack the interview. Also, it helps you to learn and memorize the concepts and topics involved in Enterprise Java Beans. Also, improves time management skills, as well as enhances coding skills.

How To Check JAVA EJB Programming Online Test Results

After completing your online test, candidates need to check your results. Check your result and also an explanation and try to reduce your mistakes by practicing more tests. Not only the theory skills help the aspirants to crack the exam. But also, aspirants must have practical knowledge. So, to improve your time management skills, we are providing you with the Java EJB MCQ Online Test in this post.

So, we hope that this article was helpful. For more queries, keep browsing our website Freshersnow.com