Quiz 1 Flashcards
The first microprocessors did not have a separate mode for kernel and user. Of what significance is this to the OS for such a microprocessor?
.
It has been said that the OS is that portion of the system’s software that runs in kernel mode. Why is this definition inadequate?
.
At the machine language level, how are devices controlled?
.
What are the major functions of the OS?
Provide an extended machine which is easier to use than the bare hardware, and manage the use of complex system resources
A computer system’s resources can be shared in 2 ways. What are these?
Sharing in time and space.
What device was used for the input of jobs to, and output results from, the main computer in a batch computing system
Magnetic tape
For what purpose was the IBM 1401 computer frequently used?
It was often used to copy jobs from punched cards to magnetic tape, and to copy results from magnetic tape to line printers
Actions taken by a computer in processing a batch job were primarily controlled by what?
Control cards such as $JOB, $LOAD, and $RUN
Just before the intro of IBM 360 computer systems, what were the main types of computers available?
Systems that used wired plugboards for input, those that used punched cards, and those that used magnetic tape.
The first major computer to use integrated circuits was…
.
Multi programming attempts to eliminate significant waste of what computer system resource(s)?
CPU
Which of the following special features is needed to support multiprogramming?
Memory protection hardware
What unrealistic goal was associated with the OS/360 OS?
It has to run well on small and large systems, on commercial and scientific systems, on systems with few and with many peripheral devices, and it had to be efficient in all cases
Who designed the first true digital computer?
Charles Babbage
Which device was used in the first generation of real digital computers
Vacuum tubes
