Which of the following are not valid Java identifiers? Why?

a. Factorial
b. anExtremelyLongIdentifierIfYouAskMe
c. 2ndLevel
d. level2
e. MAX_SIZE
f. highest$
g. hook&ladder


a. Factorial
Valid
b. anExtremelyLongIdentifierIfYouAskMe
Valid
c. 2ndLevel
Invalid because it begins with a digit
d. level2
Valid
e. MAX_SIZE
Valid
f. highest$
Valid
g. hook&ladder
Invalid because it contains an ampersand (&)

Computer Science & Information Technology

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