What type of magnetic material is normally used in bubble memories?

A byte is comprised of:

Which of the following printer can be classified as a page-at-a-time printer?

The CPU of a computer transfers print output to a temporary disk memory at high speed and then gets back to processing another job without waiting for the output to got to the printer. In this way, the CPU does not remain idle due to its own high speed as compared to the low speed of the printer. What is the name of this memory?

Which of the following registers hold the information before it goes to the decoder