Online Quiz On Unit 3&4

Which of the following methods is used to establish a connection with the database in JDBC?

• connect()

• openConnection()

• DriverManager.getConnection()

• getConnection()

Which of the following is NOT a type of JDBC driver?

• Type-1 Driver

• Type-2 Driver

• Type-3 Driver

• Type-5 Driver

What does the executeQuery() method in JDBC do?

• Executes SQL update commands like INSERT, UPDATE, or DELETE

• Executes a SQL SELECT statement

• Closes the connection to the database

• Executes any SQL statement, including creating or dropping tables

Which interface is used to retrieve data from the database after executing a query?

• Statement

• ResultSet

• Connection

• PreparedStatement

What is the purpose of the RMI Registry?

• It acts as a database for storing remote objects.

• It manages the remote method invocations.

• It allows clients to locate remote objects by name.

• It is used to create remote objects.

What does a stub represent in RMI?

• It is an actual implementation of a remote object.

• It acts as a proxy on the client side to forward requests to the remote object.

• It manages the RMI Registry.

• It stores the remote object on the server side.

Which method is used by the client to locate and obtain a reference to a remote object from the RMI Registry?

• Naming.lookup()

• Naming.rebind()

• Registry.getReference()

• Remote.lookup()

Which of the following is true about Remote Method Invocation (RMI)?

• RMI allows communication between objects on the same JVM.

• RMI allows communication between objects on different JVMs.

• RMI is only used for database communication.

• RMI does not require a network connection.

In RMI, which interface is implemented by the server to expose remote methods to the client?

• RemoteInterface

• Serializable

• Remote

• RMIObject

In RMI, the server is responsible for:

• Binding the remote object to the RMI Registry.

• Looking up the remote object from the RMI Registry.

• Providing the client with a stub.

• Providing the skeleton to the client.