Core Java - Interview Questions and Answers for 'Identifiers' | Search Interview Question

Core Java - Interview Questions and Answers for 'Identifiers' - 6 question(s) found - Order By Newest

Q1. What is the difference between keywords, identifiers and literals in java ?

Ans. Keywords are the reserved words that have a pre defined meaning for the compiler and hence are restricted to be used as identifiers.

Identifiers are the name assigned to different programming constructs like classes, interfaces, methods , variables etc.

Literals are the values that are assigned to Identifiers.

For example

int count = 0;

in the above statement "int" is a keyword, "count" is an identifier and "0" is a literal

Sample Code for keywords

Sample Code for identifiers

Sample Code for literals

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Q2. Is it a valid identifier in Java ?

int 123Abc = 5;

Core Java

Ans. No, identifier in java cannot start with a numeral.

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Q3. Is synchronized a keyword , modifier, identifier? what is it ?

Core Java

Ans. synchronized is a keyword and a modifier. The synchronized keyword is used to indicate that a method can be accessed exclusively by one thread at a time.

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Q4. What is a difference between Identifier and keyword ?

Core Java

Ans. Keyword is a reserved word that has a pre defined meaning for the compiler and hence cannot be used as an identifier, for example - final, private , for etc.

Identifier is the name given by the programmer to a programming construct, for example - class and method names etc.

java Keywords cannot be used as an identifier in java.

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Q5. Can we use java keywords as identifiers ?

Core Java

Ans. No, keyword has pre defined meaning for compiler and hence cannot be used as identifiers.

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Q6. Can we use true and false as identifiers in java ? Are they keywords in Java ?

Core Java

Ans. true and false are literals in java. No we cannot use them as identifiers.

Sample Code for literal

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