ET VOL 6 CH 6,7 Flashcards Preview

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Flashcards in ET VOL 6 CH 6,7 Deck (200)
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1

2

Which of the following items is stored in main memory?

Data, programs, calculations, and operands

3

Time interval from the instant a request for data is initiated until the data is available for use.

access time

4

The output side of a flip-flop is read from memory without having to be rewritten

non-destructive readout

5

The power to the computer is turned off and the contents of memory are retained.

nonvolatile memory

6

The particular location of a larger memory array where a packet of information is located.

memory access

7

Power is shut off to the computer and the contents of the semi- conductor memory are lost.

volatile memory

8

The data is lost when it is read from memory.

destructive readout

9

A memory unit that can receive requests from more than one CPU or I/O section is known as which of the following types of memories?

Multiported memory module

10

Pcb type memories are usually composed of which of the following memory types?

Semiconductor

11

In a typical square form memory, the intersection of an x row and y column is called a

memory word address

12

The x rows and y columns of a typical memory will be equal in number.

true

13

Memory operations in most computers usually include which of the following items?

1. Control circuits 2. Timing circuits 3. Memory cycle

14

Memory interface circuits include which of the following items?

Communication lines Interfacing register

15

A word is read from memory, then rerouted back through the Z register to be rewritten. This is what type of memory?

Destructive readout

16

Priority of memory requests are evaluated by which of the following devices?

Control circuits

17

Memory read/write enables are provided by which of the following devices?

Timing circuits

18

what is the memory cycle

read/write

19

During a complete memory cycle, the first thing that must occur is which of the following?

Memory address translation is accomplished

20

main memory is also called

ROM

21

To locate a memory address word, the computer uses which of the following items in memory?

Memory logic

22

The conversion from a logical to a physical memory address is a function of which of the following items in memory?

Memory logic

23

In all computers, for every read operation there will always be a corresponding write operation.

false only in destructive memory

24

In order to increase memory speed using interleaving, which of the following items are required?

More complex CPU and memory control circuitry

25

When odd parity is used for memory fault detection, all words stored in memory will have which of the following bits?

An odd number of set bits stored at each memory location

26

The memory protection register set is used for which of the following purposes?

To restrict read/write operations in portions of memory

27

In a memory segment within the protected area with all three bits of the memory protection control register set, which of the following operations are allowed?

1. Execute protected 2. Write protected 3. Read protected

28

Memory lockout is used by larger computers to prevent access to particular areas of memory by task state instructions. Which of the following describes the lockout function?

It is disabled when the CPU enters a particular executive or interrupt state and disabled when the CPU enters the task state

29

Compared with semiconductor memories, magnetic memories have which of the following advantages?

They require less power and they are nonvolatile

30

The state of a core or film is changed by which of the following conditions?

Current flow in the opposite direction of sufficient magnitude to overcome the magnetic field and to magnetize in the new direction