Perhaps. It has nothing to do with being poverty striken, though. Clearly the Barak I on Viraat is much younger than the ship is, so it would be a waste - silly! - to toss the Barak launchers on her when she's retired. I doubt it would be a good idea to keep VIraat in service when Vikki has been delivered (she would be of marginal operational value). Plus, I think those few SHARs may also not last.
Most likely a pair of AK 630 and 2x8 or 2x16 Barak 1, pretty much that standard sellf defence fit in the IN these days...
No it isn't, provided you check the sources of any wiki (and hence don't use sourceless wiki's). Wiki is weak is a lame argument.