Some examples from this set of practice questions
1.
write a simple java program?
Answer: Simple.java class Simple { public static void main(String args[]){ System.out.println(\"Hello Java\"); } }
2.
write about Java OOPs Concepts?
Answer: OOPs (Object-Oriented Programming System) Object means a real-world entity such as a pen, chair, table, computer, watch, etc. Object-Oriented Programming is a methodology or paradigm to design a program using classes and objects. It simplifies software development and maintenance by providing some concepts: Object Class Inheritance Polymorphism Abstraction Encapsulation
3.
What is an object in Java?
Answer: object in Java An entity that has state and behavior is known as an object e.g., chair, bike, marker, pen, table, car, etc. It can be physical or logical (tangible and intangible). The example of an intangible object is the banking system. An object has three characteristics: State: represents the data (value) of an object. Behavior: represents the behavior (functionality) of an object such as deposit, withdraw, etc. Identity: An object identity is typically implemented via a unique ID. The value of the ID is not visible to the external user. However, it is used internally by the JVM to identify each object uniquely.
4.
object in java?
Answer: An object is an instance of a class. A class is a template or blueprint from which objects are created. So, an object is the instance(result) of a class. Object Definitions: An object is a real-world entity. An object is a runtime entity. The object is an entity which has state and behavior. The object is an instance of a class.
5.
what is class in java?
Answer: A class is a group of objects which have common properties. It is a template or blueprint from which objects are created. It is a logical entity. It can\'t be physical. A class in Java can contain: Fields Methods Constructors Blocks Nested class and interface
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