Test: Synchronous & Asynchronous BUS

QUESTION: 1

The primary function of the BUS is

A.
To connect the various devices to the cpu
B.
To provide a path for communication between the processor and other devices
C.
To facilitate data transfer between various devices
D.
All of the mentioned

Solution:

Answer: a
Explanation: The BUS is used to allow the passage of commands and data between cpu and devices.

QUESTION: 2

The classification of BUSes into synchronous and asynchronous is based on

A.
The devices connected to them
B.
The type of data transfer
C.
The Timing of data transfers
D.
None of the mentioned

Solution:

Answer: c
Explanation: The BUS are classified into different types for convenience of use and depending on the device.

QUESTION: 3

The device which starts data transfer is called

A.
Master
B.
Transactor
C.
Distributor
D.
Initiator

Solution:

Answer: d
Explanation: The device which starts the data transfer is called as initiator.

QUESTION: 4

The device which interacts with the initiator is

A.
Slave
B.
Master
C.
Responder
D.
Friend

Solution:

Answer: a
Explanation: The device which recieves the commands from the initiator for data transfer.

QUESTION: 5

In synchronous BUS, the devices get the timing signals from

A.
Timing generator in the device
B.
A common clock line
C.
Timing signals are not used at all
D.
None of the mentioned

Solution:

Answer: b
Explanation: The devices recieve their timing signals from the clock line of the BUS.

QUESTION: 6

The delays caused in the switching of the timing signals is due to

A.
Memory access time
B.
WMFC
C.
Propogation delay
D.
Processor delay

Solution:

Answer: c
Explanation: The time taken for the signal to reach the BUS from the device or the circuit accounts for this delay.

QUESTION: 7

The time for which the data is to be on the BUS is affected by

A.
Propagation delay of the circuit
B.
Setup time of the device
C.
Memory access time
D.
Propagation delay of the circuit & Setup time of the device

Solution:

Answer: d
Explanation: The time for which the data is held is larger than the time taken for propogation delay and setup time.

QUESTION: 8

The Master strobes the slave at the end of each clock cycle in Synchronous BUS.

A.
True
B.
False

Solution:

QUESTION: 9

Which is fed into the BUS first by the initiator..??

A.
Data
B.
Address
C.
Commands or controls
D.
Address, Commands or controls

Solution:

QUESTION: 10

_____________ signal is used as an acknowledgement signal by the slave in Multiple cycle transfers.

A.
Ack signal
B.
Slave ready signal
C.
Master ready signal
D.
Slave recieval signal

Solution:

Answer: b
Explanation: The slave once it recieves the commands and address from the master strobes the ready line indicating to the master that the commands are recieved.

QUESTION: 11

The master indicates that the address is loaded onto the BUS,by activating _____ signal.

A.
MSYN
B.
SSYN
C.
WMFC
D.
INTR

Solution:

Answer: a
Explanation: The signal activated by the master in the asynchronous mode of transmission is used to intimate the slave the required data is on the BUS.

QUESTION: 12

The devices with variable speeds are usually connected using asynchronous BUS.

A.
True
B.
False

Solution:

Answer: a
Explanation: The devices with variable speeds are connected using asynchronous BUS, as the devices share a master-slave relationship.

QUESTION: 13

The MSYN signal is initiated

A.
Soon after the address and commands are loaded
B.
Soon after the decoding of the address
C.
After the slave gets the commands
D.
None of the mentioned

Solution:

Answer: b
Explanation: This signal is activated by the master to tell the slave that the required commands are on the BUS.

QUESTION: 14

In IBM’s S360/370 systems _____ lines are used to select the I/O devices.

A.
SCAN in and out
B.
Connect
C.
Search
D.
Peripheral

Solution:

Answer: a
Explanation: The signal is used to scan and connect to input or output devices.

QUESTION: 15

The meter in and out lines are used for

A.
Monitoring the usage of devices
B.
Monitoring the amount data transfered
C.
Measure the CPU usage
D.
None of the mentioned

Solution:

Answer: a
Explanation: The line is used to monitor the devices usage for a process.

QUESTION: 16

MRDC stands for _______

A.
Memory Read Enable
B.
Memory Ready Command
C.
Memory Re-direct Command
D.
None of the mentioned

Solution:

Answer: b
Explanation: The command is used to initiate a read from memory operation.

QUESTION: 17

The BUS that allows I/O,memory and Processor to coexist is _______

A.
Artibuted BUS
B.
Processor BUS
C.
Backplane BUS
D.
External BUS

Solution:

QUESTION: 18

The transmission on the asynchronous BUS is also called as _____

A.
Switch mode transmission
B.
Variabel transfer
C.
Bulk transfer
D.
Hand-Shake transmission

Solution:

Answer: d
Explanation: The asynchronous transmission is termed as Hand-Shake transfer because the master intimates the slave after each step of the transfer.

QUESTION: 19

Asynchronous mode of transmission is suitable for systems with multiple peripheral devices.

A.
True
B.
False

Solution:

Answer: a
Explanation: This mode of transmission is suitable for multiple device situation as it supports variable speed transfer.

QUESTION: 20

The asynhronous BUS mode of transmission allows for a faster mode of data transfer.

A.
True
B.
False

Solution:

20 Questions MCQ Test Computer Architecture & Organisation (CAO) | Test: Synchronous & Asynchronous BUS

The primary function of the BUS is

The classification of BUSes into synchronous and asynchronous is based on

The device which starts data transfer is called

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