?A _____ is a set of rules that defines how a client workstation can communicate with a server.

What is the main characteristic of real-time operating system?

a. Multiple CPU b. Time-sharing c. Time is key parameter d. Many I/O devices

During ___________ execution, the first statement in the program is executed first, then the second statement, and so on, to the last statement in the program.

Fill in the blank(s) with the appropriate word(s).