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Class notes NA3550 (NA3550) Core Java : Complete Reference for the Really Impatient.
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.Class notes Java Core Java : Complete Reference for the Really Impatient.
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Available practice questions
JAVA Flashcards
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Some examples from this set of practice questions
1.
What is the difference between procedural and object-oriented programs?
Answer: a) In procedural program, programming logic follows certain procedures and the instructions are executed one after another. In OOP program, unit of program is object, which is nothing but combination of data and code. b) In procedural program, data is exposed to the whole program whereas in OOPs program, it is accessible with in the object and which in turn assures the security of the code.
2.
What are Encapsulation, Inheritance and Polymorphism?
Answer: ENCAPSULATION is the mechanism that binds together code and data it manipulates and keeps both safe from outside interference and misuse. INHERITENCE is the process by which one object acquires the properties of another object. POLYMORPHISM is the feature that allows one interface to be used for general class actions.
3.
What is OOPs?
Answer: Object oriented programming organizes a program around its data, i. e. , objects and a set of well defined interfaces to that data. An object-oriented program can be characterized as data controlling access to code.
4.
What are Class, Constructor and Primitive data types?
Answer: Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.
5.
What is the most important feature of Java?
Answer: Java is a platform independent language.
Content preview
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