Question 46 :
What is core packages ?
The required set of APIs in a Java platform edition which must be supported in any and all compatible implementations.
Question 47 :
What is credentials ?
The information describing the security attributes of a principal. Credentials can be acquired only through authentication or delegation.
Question 48 :
What is critical section ?
A segment of code in which a thread uses resources (such as certain instance variables) that can be used by other threads, but that must not be used by them at the same time.
Question 49 :
What is declaration ?
A statement that establishes an identifier and associates attributes with it, without necessarily reserving its storage (for data) or providing the implementation (for methods). See also definition.
Question 50 :
What is default ?
A Java keyword optionally used after all case conditions in a switch statement. If all case conditions are not matched by the value of the switch variable, the default keyword will be executed.