●The principle for a stack memory to store data is (72) .
(72) A.FIFO
B.random
C.FILO
D.other way
第1题:
One attribute of the stack is(72).
A.FIFO( First In First Out)
B.LIFO( Last In First Out)
C.queue
D.built into their circuitry
第2题:
A firewall is a(71)system designed to(72)an organization's network against threats.
A.operating
B.programming
C.security
D.data
第3题:
User programs interact with the kernel through a set of standard(71). They request services to be provided by the kernel. Such services would include accessing a file: open close, read, write, link, or execute a file; starting or(72)accounting records; changing ownership of a file or(73); changing to a new directory; creating,(74), or killing a process; enabling access to hardware devices; and setting limits on system resources. Unix is a multi -user, multi -tasking operating system. You can have many users logged into a system simultaneously, each running many programs. It's the kernel's job to keep each process and user separate and to regulate access to(75), including cpu, memory, disk and other L/O devices.
A.system commands
B.system transfer
C.system calls
D.system rings
第4题:
The "main storage" normally means that part of internal storage into which instructions and other data must be loaded for subsequent execution or processing. In large computing systems, the term "main storage" is(71) to "memory". "Buffer" mainly indicates a special-purpose storage or storage area allowing, through(72) storage, the data transfer between two functional units having different transfer characteristics. A buffer storage is used between non-synchronized devices or where one is(73) and the other is parallel or between those having different trans far rates. "(74) (memory)" is also a special-purpose buffer storage, smaller and faster than main storage, used to hold a copy of instructions and data obtained from main storage and likely to be needed next by the processor. "Register" is commonly composed of a part of internal storage having a specified storage(75) and usually intended for a specific purpose.
A.suitable
B.optional
C.choice
D.preferred
第5题:
●The (72) tells the computer what to do.
(72) A.disk
B.memory
C.program
D.data
第6题:
The(72) is the primary device for entering information into the computer.
A.disk
B.keyboard
C.USB
D.memory