Microprocessors - Engineering

Q1:

Consider the following statements about Java variables
  1. Java variable must start with a letter or underscore or dollor sign.
  2. Java variable can not start with a digit.
  3. After the first character the variable can have any combination of letters or numbers.
  4. Capitalization of letters must be consistent.
Which of the above are correct?

A All

B 1, 2 and 3 only

C 2, 3, 4 only

D 1, 2 and 4 only

ANS:A - All

All these are correct for Java variables.