CS609-Midterm
1 / 50
If CPUID instruction is not present then the processor can be a
2 / 50
To distinguish 486 with Pentium CPUID Test is used.
3 / 50
Command register is an _____ bit register
4 / 50
DMA stands for_________
5 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
6 / 50
File can be______ viewed as collection of clusters or blocks.
7 / 50
To store each character in keyboard buffer ____ bytes are required.
8 / 50
The Function of I/O controller is to provide ____________.
9 / 50
On the execution of IRET instruction, number of bytes popped from stack is
10 / 50
________means typematic rate will be sent in next byte.
11 / 50
Standard PC operates in two modes in terms of memory which are
12 / 50
The output on the monitor is controlled by a controller called __________within the PC.
13 / 50
Hardware Interrupts are __________.
14 / 50
Register can be used to divide frequency is _________
15 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
16 / 50
By cascading two DMAs ____ bits can be transferred.
17 / 50
File system used in CD’s is_______ file system
18 / 50
UART stands for_______
19 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
20 / 50
Timer interrupt occurs _______ times every second by means of hardware.
21 / 50
DSR stands for __________ .
22 / 50
PPI stands for _____________.
23 / 50
------------ is used to read time from RTC
24 / 50
Operating system name contains ____ bytes in boot block.
25 / 50
Display device (Monitor) performs _________ I/O.
26 / 50
The keyboard makes use of interrupt number _______ for its input operations.
27 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
28 / 50
29 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
30 / 50
Following is not a method of I/O
31 / 50
32 / 50
Int 14H____________ can be used to send a byte
33 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
34 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
35 / 50
The ______ service # is not used in any interrupt.
36 / 50
There are two main types of interrupts namely _________________.
37 / 50
The service number is usually placed in the ________ register.
38 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
39 / 50
Keyboard uses port ____ as status port.
40 / 50
DCE stands for __________.
41 / 50
Int ________ is used to control the printer via the BIOS.
42 / 50
------------ is used to read date from RTC
43 / 50
Which of the following are types of ISR __________.
44 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
45 / 50
46 / 50
_____ bit is cleared to indicate the low nibble is being sent.
47 / 50
Only ________ ports are important from programming point of view.
48 / 50
49 / 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);
50 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
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