For computer awareness subject for IPU CET BCA exam -

You need to go through the following tips -

1. Structure of CPU
2. CPU Organisation
3. Memory and backup devices
4. Input Output devices
5. Storage

For these topics you can refer to books like Computer Knowledge by Dr. Aok Kumar or R Pillai or Computer awareness by Mini Goyal and Shweta Rani.

Refer to the website below for knowing more about IPU CET -

https://www.careers360.com/exams/ipu-cet

Best wishes, Thank you..