plz tell me where can i get general computer awareness questions(or relevant matter,any website etc), topics  like data representation(conversion between binary to hexdecimal etc......) and computer architecture(USB,input device etc ..) for MCA entrance exam.its urgent.i have exam on 29th (PGCET).

thnx

The NCERT book for Information practices/computer science at 10+2 level  is good enough to cater your needs