Computer Organization MCQ set number 00074

1. A complete transfer operation over the BUS, involving the address and a burst of data is called _____
a) Transaction
b) Transfer
c) Move
d) Procedure

Answer

Answer: a [Reason:] None.

2. The device connected to the BUS are given addresses of ____ bit.
a) 24
b) 64
c) 32
d) 16

Answer

Answer: b [Reason:] Each of the devices connected to the BUS will be allocated an address during the initialisation phase.

3. The PCI BUS has _____ interrupt request lines.
a) 6
b) 1
c) 4
d) 3

Answer

Answer: c [Reason:] The interrupt request lines are used by the devices connected to raise the interrupts.

4. _____ signal is sent by the initiator to indicate the duration of the transaction.
a) FRAME#
b) IRDY#
c) TMY#
d) SELD#

Answer

Answer: a [Reason:] The FRAME signal is used to indicate the time required by the device.

5. ______ signal is used enable commands.
a) FRAME#
b) IRDY#
c) TMY#
d) c/BE#

Answer

Answer: d [Reason:] The signal is used to enable a 4 command lines.

6. IRDY# signal is used for _______
a) Selecting the interrupt line
b) Sending an interrupt
c) Saying that the initiator is ready
d) None of the mentioned

Answer

Answer: c [Reason:] The initiator transmits this signal to tell the target that it is ready.

7. The signal used to indicate that the slave is ready is _____
a) SLRY#
b) TRDY#
c) DSDY#
d) None of the mentioned

Answer

Answer: b [Reason:] None.

8. DEVSEL# signal is used
a) To select the device
b) To list all the devices connected
c) By the device to indicate that it is ready for transaction
d) None of the mentioned

Answer

Answer: c [Reason:] This is signal is activated by the device after it as recognised the address and commands put on the BUS.

9. The signal used to initiate device select ________
a) IRDY#
b) S/BE
c) DEVSEL#
d) IDSEL#

Answer

Answer: d [Reason:] This signal is used to initialisation of device select.

10. The PCi BUS allowsus to connect _______ I/O devices.
a) 21
b) 13
c) 9
d) 11

Answer

Answer: a [Reason:] The PCI BUS allows only 21 devices to be connected as only the higher order 21 bits of the 32 bit address space is used to specify the device.