Quiz for EJB (Enterprise JavaBeans)

Q1: What does EJB stand for?

A. Enterprise JavaBeans B. Enterprise JavaBridge C. Enterprise Java Backend D. Entity JavaBeans

Q2: Which types of EJBs are available in Java EE?

A. Stateful and Stateless B. Entity and Stateless C. Singleton and Stateless only D. All of the above

Q3: Which annotation marks a class as a stateless session bean?

A. @Stateful B. @Singleton C. @Stateless D. @EJB

Q4: What is the main feature of a stateless bean?

A. Maintains client state B. Does not maintain client state C. Persists to database D. Consumes messages only

Q5: Which EJB is best for storing user session data?

A. Singleton B. Stateless C. Message-Driven D. Stateful

Q6: Which bean is shared across all clients and is instantiated once?

A. Stateful B. Stateless C. Singleton D. Message-Driven

Q7: Which annotation is used to inject EJBs?

A. @Inject B. @Autowired C. @EJB D. @Bean

Q8: Which EJB type is used for asynchronous message handling?

A. Singleton Bean B. Stateful Bean C. Stateless Bean D. Message-Driven Bean

Q9: What is the default transaction type for EJB methods?

A. REQUIRES_NEW B. MANDATORY C. REQUIRED D. NEVER

Q10: Which interface is extended by remote EJBs?

A. Serializable B. Remote C. EJBRemote D. javax.ejb.EJBObject

Q11: Which file was previously required to configure EJBs in older versions?

A. web.xml B. ejb.xml C. application.xml D. beans.xml

Q12: Which container manages EJBs?

A. Servlet Container B. JVM C. EJB Container D. Web Container

Q13: Which lifecycle method is called after a stateless EJB is created?

A. postConstruct() B. init() C. ejbCreate() D. start()

Q14: Which annotation defines a local interface in EJB?

A. @LocalBean B. @Remote C. @Local D. @Interface

Q15: What does the @Timeout annotation do in EJB?

A. Schedules a timer task B. Destroys session bean C. Handles JMS D. Injects timer

Q16: Which scope applies to a stateless session bean?

A. Per-request B. Per-client C. Shared D. None

Q17: Which annotation is used to define EJB timers?

A. @Schedule B. @Timed C. @Cron D. @Interval

Q18: Which EJB is suitable for sending email on schedule?

A. Stateful Bean B. Message-Driven Bean C. Singleton Bean D. Timer Bean

Q19: What is the role of Interceptors in EJB?

A. Handle transactions B. Monitor memory C. Handle cross-cutting concerns D. Schedule jobs

Q20: Which EJB component is best suited for batch message processing?

A. Stateful Bean B. Stateless Bean C. Singleton Bean D. Message-Driven Bean