Java Identifiers Quiz

Which of the following is a valid identifier in Java?

• 1stVariable

• variable-1

• variable_1

• variable@1

In Java, an identifier can start with which of the following?

• A digit (0-9)

• A letter (A-Z, a-z)

• A special character

• Any character

Which of the following identifiers is not allowed in Java?

• myVariable

• _myVariable

• my variable

• $myVariable

What is the maximum length of an identifier in Java?

• 64 characters

• 128 characters

• 255 characters

• There is no limit

Which of the following is true about Java identifiers?

• Identifiers can include spaces.

• Identifiers are case-sensitive.

• Identifiers can start with a digit.

• Identifiers can include special characters like @ and #.

Which of the following identifiers is a reserved keyword in Java?

• myVar

• class

• my_class

• ClassVariable

Which of the following is the correct way to declare a variable with a valid identifier?

• int 2ndVariable;

• int my-variable;

• int myVariable;

• int my variable;

Which of the following is a valid identifier for a constant in Java?

• MY_CONSTANT

• myConstant

• MyConstant

• my_constant

What will happen if an identifier is the same as a Java keyword?

• It will compile successfully.

• It will result in a compile-time error.

• It will be treated as a variable.

• It will overwrite the keyword.

Which of the following rules applies to identifiers in Java?

• Identifiers can contain spaces and special characters.

• Identifiers can be any length but should not start with a digit.

• Identifiers cannot be changed after declaration.

• Identifiers are case-insensitive.