What is use of this keyword in Java Mcq?

What is not the use of this keyword in Java?

2 Answers. The correct answer to the question “What is not the use of ‘this’ keyword in Java” is, option (d). Passing itself to the method of the same class. This is one of the most important keywords in Java and is used to distinguish between local variables and variables that are passed in the methods as parameters.

What does this keyword mean in Java?

this is a keyword in Java. Which can be used inside method or constructor of class. It(this) works as a reference to a current object whose method or constructor is being invoked. this keyword can be used to refer any member of current object from within an instance method or a constructor.

What is the purpose of using keyword in Java?

Java keywords are also known as reserved words. Keywords are particular words that act as a key to a code. These are predefined words by Java so they cannot be used as a variable or object name or class name.

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What are the six ways to use this keyword in Java?

What are the 6 ways to use this keyword in Java?

  1. this can be used to get the current object.
  2. this can be used to invoke current object’s method.
  3. this() can be used to invoke current class constructor.
  4. this can be passed as a parameter to a method call.
  5. this can be passed as a parameter to a constructor.

Is overriding possible in Java?

In Java, methods are virtual by default. We can have multilevel method-overriding. Overriding vs Overloading : … Overriding is about same method, same signature but different classes connected through inheritance.

What are the main uses of this keyword?

The this keyword refers to the current object in a method or constructor. The most common use of the this keyword is to eliminate the confusion between class attributes and parameters with the same name (because a class attribute is shadowed by a method or constructor parameter).

What is super () in Java?

The super keyword in Java is a reference variable which is used to refer immediate parent class object. Whenever you create the instance of subclass, an instance of parent class is created implicitly which is referred by super reference variable. … super() can be used to invoke immediate parent class constructor.

What is true constructor?

What is true about constructor? Explanation: Constructor returns a new object with variables defined as in the class. Instance variables are newly created and only one copy of static variables are created. … Explanation: No instance can be created of abstract class.

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Is bytecode a class?

3 Answers. Yes, a Java class file is a file containing Java bytecode that can be executed on the Java Virtual Machine (JVM). A Java class file is usually produced by a Java compiler from Java programming language source files (.

What are the important keywords in Java?

Java Keyword List

Keyword Description
import Used to include or reference other packages/classes into the program.
instanceof Used to check if the given object is an instance of another class.
int Data type to hold a 32-bit integer value.
interface Used for declaring an interface.

What is use of final keyword in Java?

Java final keyword is a non-access specifier that is used to restrict a class, variable, and method. If we initialize a variable with the final keyword, then we cannot modify its value. If we declare a method as final, then it cannot be overridden by any subclasses.

Is Main a keyword in Java?

main: It is the name of Java main method. It is the identifier that the JVM looks for as the starting point of the java program. It’s not a keyword.

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