CS609-Midterm
1 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
2 / 50
PPI is used to perform parallel communication
3 / 50
The keyboard input character scan code is received at ___ port.
4 / 50
DTE is ____________.
5 / 50
REGS is a Union
6 / 50
DSR stands for __________ .
7 / 50
File can be______ viewed as collection of clusters or blocks.
8 / 50
------------ is used to read date from RTC
9 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
10 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
11 / 50
Operating system name contains ____ bytes in boot block.
12 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
13 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
14 / 50
On the execution of IRET instruction, number of bytes popped from stack is
15 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
16 / 50
To store each character in keyboard buffer ____ bytes are required.
17 / 50
_____ bit is cleared to indicate the low nibble is being sent.
18 / 50
______ is LED control byte.
19 / 50
A software interrupt does not require EOI (End of interrupt).
20 / 50
Int 14H __________ can be used to receive a byte.
21 / 50
LPTs can be swapped.
22 / 50
The keyboard makes use of interrupt number _______ for its input operations.
23 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
24 / 50
The ____________ function simply enables the self test facility within the modem control register
25 / 50
Which of the following are types of ISR __________.
26 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
27 / 50
Int 14H____________ can be used to send a byte
28 / 50
There are __________ kinds of serial communication.
29 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
30 / 50
_______ is LED control byte.
31 / 50
File system used in CD’s is_______ file system
32 / 50
Only ________ ports are important from programming point of view.
33 / 50
In ____________each byte is needed to be encapsulated in start and end.
34 / 50
Interrupt 9 usually reads the _________ from keyboard.
35 / 50
The service number is usually placed in the ________ register.
36 / 50
There are two main types of interrupts namely _________________.
37 / 50
Tail of keyboard should get to get the start of buffer.
38 / 50
39 / 50
In keyboard status byte bit no. 2 and 3 are used for ctrl and alt keys respectively. which of the following condition is used to check that Ctrl + Alt keys are pressed. Where: unsigned char far * scr = (unsigned char far *)(0x00400017);
40 / 50
Communication between keyboard and keyboard controller is __________.
41 / 50
The interval timer can operate in ____modes.
42 / 50
Command register is an _____ bit register
43 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
44 / 50
45 / 50
Interrupt ______ is used to get or set the time.
46 / 50
Timer interrupt is a _________.
47 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
48 / 50
________means typematic rate will be sent in next byte.
49 / 50
There are two main types of interrupts, namely
50 / 50
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