CS609-Midterm
1 / 50
_____ bit is cleared to indicate the low nibble is being sent.
2 / 50
A software interrupt does not require EOI (End of interrupt).
3 / 50
The ______ service # is not used in any interrupt.
4 / 50
Timer interrupt occurs _______ times every second by means of hardware.
5 / 50
DSR stands for __________ .
6 / 50
REGS is a Union
7 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
8 / 50
On the execution of IRET instruction, number of bytes popped from stack is
9 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
10 / 50
To distinguish 486 with Pentium CPUID Test is used.
11 / 50
If keyboard buffer is empty the head and tail points at the same location.
12 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
13 / 50
BIOS support _____________UARTS as COM ports.
14 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
15 / 50
Command register is an _____ bit register
16 / 50
The keyboard makes use of interrupt number _______ for its input operations.
17 / 50
File system used in CD’s is_______ file system
18 / 50
Hardware Interrupts are __________.
19 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
20 / 50
DCE is _____________
21 / 50
In ____________each byte is needed to be encapsulated in start and end.
22 / 50
Interrupt ______ is used to get or set the time.
23 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
24 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
25 / 50
Standard PC operates in two modes in terms of memory which are
26 / 50
DTE is ____________.
27 / 50
_________ is used to identify the cause of interrupt.
28 / 50
29 / 50
------------ is used to set time from RTC
30 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
31 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
32 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
33 / 50
------------ is used to read date from RTC
34 / 50
Only ________ ports are important from programming point of view.
35 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
36 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
37 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
38 / 50
PPI is used to perform parallel communication
39 / 50
LPTs can be swapped.
40 / 50
41 / 50
Display device (Monitor) performs _________ I/O.
42 / 50
Following is not a method of I/O
43 / 50
Keyboard Status Byte is located at the address
44 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
45 / 50
The interval timer can operate in _______ modes.
46 / 50
A single interrupt controller can arbitrate among ____ different devices.
47 / 50
48 / 50
Communication between keyboard and keyboard controller is __________.
49 / 50
BIOS DO NOT support ______.
50 / 50
________means typematic rate will be sent in next byte.
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