CS609-Midterm
1 / 50
Operating system name contains ____ bytes in boot block.
2 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
3 / 50
Only ________ ports are important from programming point of view.
4 / 50
The service _________ is called the keyboard hook service.
5 / 50
__________is used to control the printer via the BIOS
6 / 50
______ is LED control byte.
7 / 50
UART stands for_______
8 / 50
Timer interrupt occurs _______ times every second by means of hardware.
9 / 50
Which port is known as Data Port______
10 / 50
DCE stands for __________.
11 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
12 / 50
Interrupt ______ is used to get or set the time.
13 / 50
The keyboard makes use of interrupt number _______ for its input operations.
14 / 50
Interrupt service number is usually placed in ____________ register.
15 / 50
At IRQ 7 Interrupt # ___ is used.
16 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
17 / 50
In ____________each byte is needed to be encapsulated in start and end.
18 / 50
Counter register can be used to divide clock signal.
19 / 50
Interrupt _____ is empty; we can use its vector as a flag.
20 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
21 / 50
22 / 50
Hardware Interrupts are __________.
23 / 50
The interval timer can operate in ____modes.
24 / 50
________means typematic rate will be sent in next byte.
25 / 50
DCE is _____________
26 / 50
The output on the monitor is controlled by a controller called __________within the PC.
27 / 50
28 / 50
There are two main types of interrupts namely _________________.
29 / 50
In self test mode the output of the UART is routed to its input.
30 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
31 / 50
32 / 50
------------ is used to set time from RTC
33 / 50
Which of the following are types of ISR __________.
34 / 50
Keyboard uses port ____ as status port.
35 / 50
The service number is usually placed in the ________ register.
36 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
37 / 50
A single interrupt controller can arbitrate among ____ different devices.
38 / 50
DSR stands for __________ .
39 / 50
On the execution of IRET instruction, number of bytes popped from stack is
40 / 50
Standard PC operates in two modes in terms of memory which are
41 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
42 / 50
Keyboard Status Byte is located at the address
43 / 50
DMA stands for_________
44 / 50
DTE is ____________.
45 / 50
Maximum number of interrupts in a standard PC is
46 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
47 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
48 / 50
49 / 50
Int 14H __________ can be used to receive a byte.
50 / 50
If keyboard buffer is empty the head and tail points at the same location.
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