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J2SE Interview Questions and Answers
What is member ?
A field or method of a class. Unless specified otherwise, a member is
not static.
What is method ?
A function defined in a class. See also instance method, class method.
Unless specified otherwise, a method is not static.
What is multithreaded ?
Describes a program that is designed to have parts of its code execute
concurrently. See also thread.
What is native ?
A Java keyword that is used in method declarations to specify that the
method is not implemented in the same Java source file, but rather in
another language.
What is new ?
A Java keyword used to create an instance of a class.
What is null ?
The null type has one value, the null reference, represented by the
literal null, which is formed from ASCII characters. A null literal is
always of the null type.
What is object ?
The principal building blocks of object-oriented programs. Each object
is a programming unit consisting of data (instance variables) and
functionality (instance methods). See also class.
What is object-oriented design ?
A software design method that models the characteristics of abstract or
real objects using classes and objects.
What is octal What is object-oriented design ?
The numbering system using 8 as its base, using the numerals 0-7 as its
digits. In programs written in the Java programming language, octal
numbers must be preceded with 0. See also hexadecimal.
What is optional packages ?
The set or sets of APIs in a Java platform edition which are available
with and may be supported in a compatible implementation. Over time,
optional packages may become required in an edition as the marketplace
requires them.
What is ORB ?
Object Request Broker. A library than enables CORBA objects to locate
and communicate with one another.
What is OS principal ?
A principal native to the operating system on which the Java platform is
executing.
What is OTS ?
Object Transaction Service. A definition of the interfaces that permit
CORBA objects to participate in transactions.
What is overloading ?
Using one identifier to refer to multiple items in the same scope. In
the Java programming language, you can overload methods but not
variables or operators.
What is overriding ?
Providing a different implementation of a method in a subclass of the
class that originally defined the method.
What is package ?
A group of types. Packages are declared with the package keyword.
What is peer ?
In networking, any functional unit in the same layer as another entity.
What is persistence ?
The protocol for transferring the state of a bean between its instance
variables and an underlying database.
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