CS609-Midterm
1 / 50
By cascading two DMAs ____ bits can be transferred.
2 / 50
Standard PC operates in two modes in terms of memory which are
3 / 50
PPI is used to perform parallel communication
4 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
5 / 50
There are two type of communication synchronous and Anti Synchronous
6 / 50
_______ is LED control byte.
7 / 50
On the execution of IRET instruction, number of bytes popped from stack is
8 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
9 / 50
Keyboard uses port ____ as status port.
10 / 50
DSR stands for __________ .
11 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
12 / 50
DMA stands for_________
13 / 50
The keyboard makes use of interrupt number _______ for its input operations.
14 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
15 / 50
Hardware Interrupts are __________.
16 / 50
A software interrupt does not require EOI (End of interrupt).
17 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
18 / 50
At IRQ 7 Interrupt # ___ is used.
19 / 50
------------ is used to set time from RTC
20 / 50
The interval timer can operate in ____modes.
21 / 50
The output on the monitor is controlled by a controller called __________within the PC.
22 / 50
Following is not a method of I/O
23 / 50
Int ________ is used to control the printer via the BIOS.
24 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
25 / 50
File can be______ viewed as collection of clusters or blocks.
26 / 50
Interrupt 9 usually reads the _________ from keyboard.
27 / 50
DTE is ____________.
28 / 50
------------ is used to read date from RTC
29 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
30 / 50
Display device (Monitor) performs _________ I/O.
31 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
32 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
33 / 50
NMI Stand for
34 / 50
If keyboard buffer is empty the head and tail points at the same location.
35 / 50
PPI stands for _____________.
36 / 50
37 / 50
The interval timer can operate in _______ modes.
38 / 50
The service _________ is called the keyboard hook service.
39 / 50
Maximum number of interrupts in a standard PC is
40 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
41 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
42 / 50
Which of the following are types of ISR __________.
43 / 50
________means typematic rate will be sent in next byte.
44 / 50
DCE stands for __________.
45 / 50
46 / 50
Interrupt _____ is empty; we can use its vector as a flag.
47 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
48 / 50
___________ is used to identify cause of interrupt.
49 / 50
_____ bit is cleared to indicate the low nibble is being sent.
50 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
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