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Microprocessors - Engineering

Q1:

Consider the following
  1. The first letter of a Java variable is lower case.
  2. Each successive word in Java variable begins with a capital letter.
  3. All other letters are lower case.
  4. A Java variable can have a digit as first character.
Which of the above are correct?

A All

B 1, 2, 3 only

C 1, 2, 4 only

D 2, 3, 4 only

ANS:B - 1, 2, 3 only

Digit as first character is not allowed.