Hello, Kajal,
You are definitely qualified for the SCJA ... overqualified actually.
As you already have the SCJP and SCWCD certifications there is no need for you to acquire the SCJA. It sounds more like
you should be heading towards the Architect (SCEA) or another Developer certification (
SCJD, SCBCD, SCDJWS, or SCMAD).
SCJA is an introductory certification for aspirants who are new to the Java language and tests knowledge based on the language's basic syntax, functionality, and uses. You have already been certified to a much higher level of these requirements.
Cheers,
Geoff.