Interview Questions - Advanced Java
73.
What is the difference between the String and StringBuffer classes?
String objects are constants. StringBuffer objects are not constants.
74.
If a variable is declared as private, where may the variable be accessed?
A private variable may only be accessed within the class in which it is declared.
75.
What is an object's lock and which object's have locks?
An object's lock is a mechanism that is used by multiple threads to obtain synchronized access to the object. A thread may execute a synchronized method of an object only after it has acquired the object's lock.
All objects and classes have locks. A class's lock is acquired on the class's Class object.
76.
What is the Dictionary class?
The Dictionary class provides the capability to store key-value pairs.
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