The covers come with a built-in ________ that works like a traditional mouse but uses touch

In a PDF file, you want a button to change appearance when the user holds the mouse over the button. How do you create this effect?

What will be an ideal response?

Suppose that the transaction processing system of your university contains a table in which there is one tuple for each current student.

a. Estimate howmuch disk storage is required to store this table. b. Give examples of transactions in the student registration system that have to lock this entire table if a table locking concurrency control is used.