Topic: Java Collection Interview Question 6 ?

Java Interview Questions 

What is a platform?

 
A platform is the hardware or software environment in which a program runs. Most platforms can be described as a combination of the operating system and hardware, like Windows 2000/XP, Linux, Solaris, and MacOS.
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What is the main difference between Java platform and other platforms?
The Java platform differs from most other platforms in that it's a software-only platform that runs on top of other hardware-based platforms.
The Java platform has two components:
*The Java Virtual Machine (Java VM)
*The Java Application Programming Interface (Java API)

Topic: Java Collection Interview Question

Q:   What is the Collections API?
A:   The Collections API is a set of classes and interfaces that support operations on collections of objects.

Q:   What is the List interface?
A:   The List interface provides support for ordered collections of objects.

Q:   What is the Vector class?
A:   The Vector class provides the capability to implement a growable array of objects. 

Java Interview Questions 4

What is a virtual function in C++?

Simply put, the virtual keyword enables a function to be 'virtual' which then gives possibility for that function to be overridden (redefined) in one or more descendant classes. It is a good feature since the specific function to call is determined at run-time. In other words, a virtual function allows derived classes to replace the implementation provided by the base class.

Topic: JAVA INTERVIEW QUESTIONS-3?

Java Interview Questions-3

What is the difference between an Interface and an Abstract class?

An Abstract class declares have at least one instance method that is declared abstract which will be implemented by the subclasses. An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior.

Topic: JAVA INTERVIEW QUESTIONS-2?

Java Interview Questions-2?

Q:What is the difference between an Interface and an Abstract class?
A:   An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior and all methods are implicitly abstract. An interface has all public members and no implementation. An abstract class is a class which may have the usual flavors of class members (private, protected, etc.), but has some abstract methods.
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Topic: JAVA INTERVIEW QUESTIONS?

Java Interview Questions

What is a virtual function in C++?

Simply put, the virtual keyword enables a function to be 'virtual' which then gives possibility for that function to be overridden (redefined) in one or more descendant classes. It is a good feature since the specific function to call is determined at run-time. In other words, a virtual function allows derived classes to replace the implementation provided by the base class.