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ET VOL > ET VOL 6 CH 7 CONT > Flashcards

ET VOL 6 CH 7 CONT Flashcards

1
Q

The read/write control logic accepts control signals from which of the following devices?

A
  1. The control bus
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2
Q

To program the USART for the applicable interface when it is in an idle state, which of the following signals/words is required?

A
  1. A new set of control words
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3
Q

The universal synchronous-asynchronous receiver transmitter is enabled for reading/writing operations when which of the following signals is true?

A
  1. The CHIP SELECT
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4
Q

When the WRITE DATA (WD) signal is true, it means which of the following things?

A

It indicates the microprocessor is placing data on the data bus

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5
Q

When the READ DATA (RD) signal is true, the microprocessor is ready for which of the following activities?

A
  1. To receive data and status words
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6
Q

The transmit control logic converts the data bytes stored in the transmit buffer into which of the following forms?

A
  1. An asynchronous bit stream
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7
Q

A start bit is used for which of the following purposes?

A
  1. To alert the output device
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8
Q

A parity bit is used for which of the following purposes?

A
  1. To detect errors
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9
Q

The receive buffer stores which of the following information?

A
  1. Parallel bytes
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10
Q

The voltage and current characteristics of line drivers/receivers are dictated by which of the following factors?

A

Type of circuitry (TTL or MOS

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11
Q

Type A (NTDS) Slow interface format is able to transmit which of the following number of bit groupings?

A

16, 30, or 32, depending on the type of computer

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12
Q

The data transmission rate for Type A (NTDS) Slow format is limited by which of the following factors?

A

The large voltage change between logic states

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13
Q

In Type D (NTDS SERIAL) interface format, information frames are made up of what total number of bits?

A

32 bits

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14
Q

Type D (NTDS SERIAL) interface format can transmit digital signals up to which of the following lengths?

A

1000ft

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15
Q

Type E (NATO SERIAL) format requires which of the following I/O cables?

A

Triaxial

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16
Q

Type E (NATO SERIAL) format is most frequently used with which of the following equipment?

A

Mainframe computers

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17
Q

Type F (aircraft internal time division multiplex [TDM] bus) interface format transmits bit groupings consisting of what total number of bits?

A

20

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18
Q

Type F (aircraft internal time division multiplex [TDM] bus) interface format can handle which of the following numbers of external devices on one channel?

A

32 (including a bus controller

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19
Q

Type G (RS-449) interface format primarily uses which of the following protocols?

A
  1. Command and response
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20
Q

The Small Computer System Interface (ANSI X3.131) using one controller can daisy chain up to what maximum number of units?

A

8

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21
Q

The RS-232 interface can be used for which of the following types of transfers?

A
  1. Asynchronous and synchronous serial
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22
Q

The RS-232 interface can be used with which of the following types of computers?

A
  1. Micros, minis, and mainframes
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23
Q

The RS-232 interface limits cable transfers to what maximum number of feet?

A

50ft

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24
Q

In the RS-232 interface, most peripherals control configuration parameters using which of the following methods?

A

dip switches

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25
Q

The higher transmission rate of the RS-422 interface is made possible by which of the following techniques?

A
  1. Two separate wires are used 2. The receiver transition period is narrower 3. The grounding requirements are less critical
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26
Q

In a token ring network, a station with a message waits until it receives a free token, it then changes the free token to a busy token, and transmits a block of data following the busy token. What term is used for the block of data?

A

frame

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27
Q

The Ethernet interface is used to transfer which of the following types of data in what format?

A
  1. Serial I/O data in packet format
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28
Q

The type of cable used for the Ethernet interface is which of the following?

A
  1. Shielded coaxial
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29
Q

Thin Ethernet interface used in smaller systems can have a maximum cable length of which of the following?

30
Q

The Centronics Compatible Parallel interface uses which of the following types of protocol?

A
  1. Command/acknowledge
31
Q

Most floppy disk drives today are controlled by which of the following interfaces?

A
  1. ST-506/412 interface
32
Q

When using the ST-506/412 interface, the controller card performs which of the following functions for disk drives?

A
  1. Moves the magnetic head 2. Spins the magnetic disk 3. Strips off formatting and control words
33
Q

When using the ST-506/412 to interface a hard disk drive, the cabling required is which of the following?

A
  1. A 34-pin control cable 2. A 20-pin data cable
34
Q

When using the ST-506/412 to interface a floppy disk drive, the cabling required is which of the following?

A

34-pin control cable

35
Q

The enhanced small device interface can transfer data at up to which of the following rates?

A

24 megabits per second

36
Q

When using the enhanced small device interface with a floppy disk drive, the cabling required is which of the following?

A
  1. A 34-pin control cable 2. A 20-pin data cable
37
Q

All electronics used for the integrated drive electronics interface are located in which of the following areas?

A

The hard drive

38
Q

The integrated drive electronics interface can handle disk drives with a maximum capacity of which of the following?

39
Q

The minimum number of conductors required for I/O serial data operations is which of the following?

40
Q

During asynchronous data exchange, a frame of data must include which of the following bits at a minimum?

A
  1. One start bit 2. One stop bit 3. Seven character bits
41
Q

During asynchronous data exchange, the maximum number of bits for one frame of data is which of the following?

42
Q

Compared to asynchronous data exchange, synchronous data exchange has which of the following advantages?

A

Faster speed

43
Q

The generally accepted standard connector for implementing an RS-232 connection has what total number of pins?

44
Q

The protective ground, pin 1 of the RS-232 interface connector in the DTE/DCE mode should always be connected to the shielded cable shield at both ends.

A

false just one side

45
Q

Pin 7 of the RS-232 interface connector in the DTE/DCE mode should always be connected at both ends for which of the following reasons?

A

To complete the path for control signals only

46
Q

Pin 3 of the RS-232 interface connector in the DTE/DCE mode is used for which of the following purposes?

A

To receive data signals

47
Q

Pins 4, 5, 6, and 20 are used in the DTE/DCE mode using the RS-232 interface connector for which of the following purposes?

A

To establish the communications link (pin 4-send)(pin 5 clear to send)(pin-6 data ready set)(pin 20 data terminal reads)

48
Q

In parallel data operations, the IOA or line driver/receiver provides the means to accomplish which of the following tasks?

A
  1. Drive or detect the digital signals
49
Q

In parallel data operations, one I/O channel could consist of which of the following devices?

A
  1. Two cables, one for input and one for output or a single cable to handle both input and output 2. Eight or more data lines 3. A number of control lines
50
Q

The data strobe in single parallel cable operations is used for which of the following purposes?

A

Signals the external device that data is ready to be read from the data lines

51
Q

In single parallel cable operations, a busy signal would be sent under which of the following conditions?

A

The external equipment input buffer is full

52
Q

In two cable parallel operations, an external interrupt enable can be described as which of the following?

A

A signal sent from the computer on the input line

53
Q

When an external interrupt code is placed on the data lines, it is accompanied by which of the following signals?

A
  1. An external interrupt request
54
Q

In a two cable sequence of events for input data, the first event will be which of the following?

A

The external equipment places a word of data on the ID lines

55
Q

In the two cable sequence of events for input data, the computer has sampled the data on the ID lines. Which of the following events must occur before the computer will accept more data?

A
  1. The IDR must be cleared
56
Q

During a normal external function sequence of events, the computer places an EF code word on the OD lines. The next event to take place is which of the following?

A
  1. The EFR line is set External Fuction Ready
57
Q

During forced external functions, the computer does not require which of the following signals?

A

EFR External Fuction Ready

58
Q

During the external interrupt sequence of events, what is the first event that must occur before a computer will accept an external interrupt?

A

The EIE line is set

59
Q

All computers used by the Navy will have EIE lines.

60
Q

In intercomputer I/O operations when parallel channels are used, the input and output cables will have which of the following characteristics?

A

The input and output cables will be identical

61
Q

During intercomputer I/O operations, command words include which of the following data?

A

External functions, forced external functions, and external function buffer words

62
Q

During intercomputer I/O operations, command word functions are identified by use of which of the following techniques?

A
  1. Additional interface signals
63
Q

For an intercomputer command word buffered transfer, the receiving computer is ready to accept an external function command word. This is signaled by which of the following means?

A

The external interrupt enable line is set

64
Q

During an intercomputer command word buffered transfer, before putting the EF code on the data lines, the transmitting computer recognizes which of the following signals?

A

EFR External Function Ready

65
Q

In intercomputer I/O operations, all command words specified by the receiving computer’s EF buffer control words will be transferred one command word at a time.

66
Q

Before the intercomputer data transfer sequence of events can begin, which of the following events must have occurred on the same channel?

A
  1. An OD buffer must have been established on the transmitting computer 2. An ID buffer must have been established on the receiving computer
67
Q

In intercomputer data transfers, the data word is held on the OD lines until the receiving computer performs which of the following tasks?

A
  1. Sets the resume line
68
Q

In intercomputer data transfer, the receiving computer recognizes the ready line of the transmitting computer as what line?

A
  1. The IDR line
69
Q

In intercomputer data transfer, the transmitting computer recognizes the IDA line of the receiving computer as what line?

A

The resume line

70
Q

In intercomputer data transfer, after one data word has been transferred and before the next data word is placed on the data OD lines, which of the following events occurs?

A
  1. The receiving computer sets the IDA line 2. The transmitting computer clears the ready line

ET VOL (7 decks)

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