CS609-Midterm
1 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
2 / 50
_____ bit is cleared to indicate the low nibble is being sent.
3 / 50
Control information in files is maintained using
4 / 50
A software interrupt does not require EOI (End of interrupt).
5 / 50
Timer interrupt is a _________.
6 / 50
There are two main types of interrupts namely _________________.
7 / 50
Each paragraph in keep function is ____ bytes in size.
8 / 50
______ is Disk interrupt.
9 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
10 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
11 / 50
The service number is usually placed in the ________ register.
12 / 50
Timer interrupt occurs _______ times every second by means of hardware.
13 / 50
BIOS support _____________UARTS as COM ports.
14 / 50
Tail of keyboard should get to get the start of buffer.
15 / 50
To store each character in keyboard buffer ____ bytes are required.
16 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
17 / 50
File system used in CD’s is_______ file system
18 / 50
Software based flow control make use of -------- control characters
19 / 50
20 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
21 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
22 / 50
Hardware Interrupts are __________.
23 / 50
The keyboard makes use of interrupt number _______ for its input operations.
24 / 50
______ is LED control byte.
25 / 50
_________ is used to identify the cause of interrupt.
26 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
27 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
28 / 50
In self test mode the output of the UART is routed to its input
29 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
30 / 50
PPI stands for
31 / 50
DTE is ___________
32 / 50
Maximum number of interrupts in a standard PC is
33 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
34 / 50
35 / 50
PPI stands for _____________.
36 / 50
37 / 50
DTE is ____________.
38 / 50
In self test mode the output of the UART is routed to its input.
39 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
40 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
41 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
42 / 50
If CPUID instruction is not present then the processor can be a
43 / 50
Which of the following are types of ISR __________.
44 / 50
The keyboard input character scan code is received at ___ port.
45 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
46 / 50
Standard PC operates in two modes in terms of memory which are
47 / 50
By cascading two DMAs ____ bits can be transferred.
48 / 50
DMA stands for_________
49 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
50 / 50
Only ________ ports are important from programming point of view.
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