Which technologies support distributed computing in Java?

Which technologies support distributed computing in Java?

• A. JDBC and Servlets
• B. RMI (Remote Method Invocation) and EJB (Enterprise Java Beans)
• C. JVM and JRE
• D. JIT compiler and garbage collection

Answer: (B)

Distributed computing in Java hinges on mechanisms that let objects and services run on different machines coordinate as a single application. RMI (Remote Method Invocation) fits this by allowing a Java program to call methods on a remote object as if it were local, handling the network communication, parameter marshaling, and return values across JVMs. EJB (Enterprise JavaBeans) complements this by providing a server-side component model designed for scalable, distributed business applications; it exposes business logic via remote interfaces, while the container manages distribution concerns like transactions, security, and lifecycle. By contrast, JDBC is mainly for database access, Servlets handle web components, and the JVM/JRE are runtime environments rather than distributed computing technologies; JIT compilation and garbage collection are performance features. So the technologies that directly support distributed computing in Java are RMI and EJB.

Distributed computing in Java hinges on mechanisms that let objects and services run on different machines coordinate as a single application. RMI (Remote Method Invocation) fits this by allowing a Java program to call methods on a remote object as if it were local, handling the network communication, parameter marshaling, and return values across JVMs. EJB (Enterprise JavaBeans) complements this by providing a server-side component model designed for scalable, distributed business applications; it exposes business logic via remote interfaces, while the container manages distribution concerns like transactions, security, and lifecycle. By contrast, JDBC is mainly for database access, Servlets handle web components, and the JVM/JRE are runtime environments rather than distributed computing technologies; JIT compilation and garbage collection are performance features. So the technologies that directly support distributed computing in Java are RMI and EJB.