Objective Java Multiple Choice Questions Part 8

71. Who is Consumer in Topic..?

       Topic Destruction.

       Topic subscriber

       Topic Messages.

       Topic publisher.

       Topic consumer.

72      @version is used in  beans that change less frequently.

True

false

73.  MDBs are like ______

Stateless beans

74.     A large code regarding bean managed transaction (check for the comments)

The answer is the option “ut=sc.getTransaction(); // to get transaction from sessioncontext”

75. MDBs used which of the annotations

a.       Postconstruct

b.       Predestroy

     @Resource @MessageDriven

76. Select one of the options dat best describes Entity beans(so many options with large codes will be given)

 The answer is mostly “IT’S A POJO CLASS WITH ANNOTATIONS”

77. Diff between stateless and stateful bean:

Stateful can use return values of one method in another but stateless cant do it

78.     Which is not a valid bean state?

a.       Does Not Exist

b.       Ready

c.       Pooled

d.       No State

79. Which is a client of a session bean implementing local interface?

a.       Session,entity and MDB

b.       Stateless bean

c.       Stateful bean

d.       Client class must have a jndi lookup

e.   mdb(could be)

80.     How to convert an MDB from stateless to stateful.

a.      Cannot be done