The valid keyword used in Java language for subclassing is “extends” not subclasses. 3. How many reserved keywords are there in Java language? Explanation: As of Java 1.5 there are 50 keywords out of which 48 are used(const and goto keywords are unusable keywords).
How many keywords are available in Java?
In the Java programming language, a keyword is any one of 52 reserved words that have a predefined meaning in the language; because of this, programmers cannot use keywords as names for variables, methods, classes, or as any other identifier. Of these 52 keywords, 49 are in use, 1 is in preview, and 2 are not in use.
Which is valid keyword in Java Mcq?
The correct answer to the question “Which is a valid Keyword in Java” is, option (a). interface.
Which one of the following is a Java keyword Mcq?
Explanation: In the above options, strictfp is the only reserved keyword of Java.
What is super keyword in Java Mcq?
Q) Super keyword in java is used to
Refer immediate parent class instance variables.
What are all the keywords in Java?
List of all Java Keywords
- abstract. Specifies that a class or method will be implemented later, in a subclass.
- assert. Assert describes a predicate placed in a java program to indicate that the developer thinks that the predicate is always true at that place.
- boolean. …
- break. …
- byte. …
- case. …
- catch. …
What is a keyword list some Java keywords?
A list of Java keywords or reserved words are given below: abstract: Java abstract keyword is used to declare an abstract class. … boolean: Java boolean keyword is used to declare a variable as a boolean type. It can hold True and False values only. break: Java break keyword is used to break the loop or switch statement.
How many reserved keywords are currently defined in Java language Mcq?
How many reserved keywords are there in Java language? Explanation: As of Java 1.5 there are 50 keywords out of which 48 are used(const and goto keywords are unusable keywords).
What is valid keyword?
Answer: A. interface is a valid keyword. Option B is wrong because although “String” is a class type in Java, “string” is not a keyword. … The keyword for the Java primitive is float.
Which of these is not a keyword in Java?
Note: true , false , and null are not keywords, but they are literals and reserved words that cannot be used as identifiers.
Which one of the following is a Java keyword?
Keywords in the Java programming language
What is the use of this keyword in Java Mcq?
Explanation: “this” is an important keyword in java. It helps to distinguish between local variable and variables passed in the method as parameters.
How many primitive data types are there in Java?
The eight primitive data types supported by the Java programming language are: byte: The byte data type is an 8-bit signed two’s complement integer. It has a minimum value of -128 and a maximum value of 127 (inclusive).
What is byte code in Java Mcq?
Q) Byte code is
Byte code is machine independent. This the reason we say that java is platform independent language. Compiler converts program to byte code (class file) and since this byte code is platform independent, it can be placed on any machine and by JVM program can be run.
What is the 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.
Which variable does this keyword differentiate?
1. this keyword is used to differentiate between instance and local variable. Ex: this.