CS609-Midterm
1 / 50
The ____________ function simply enables the self test facility within the modem control register
2 / 50
Control information in files is maintained using
3 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
4 / 50
DMA stands for_________
5 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
6 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
7 / 50
DCE stands for __________.
8 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
9 / 50
A software interrupt does not require EOI (End of interrupt).
10 / 50
In self test mode the output of the UART is routed to its input
11 / 50
By cascading two DMAs ____ bits can be transferred.
12 / 50
Only ________ ports are important from programming point of view.
13 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
14 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
15 / 50
In self test mode the output of the UART is routed to its input.
16 / 50
Maximum number of interrupts in a standard PC is
17 / 50
Interrupt _____ is empty; we can use its vector as a flag.
18 / 50
Interrupt service number is usually placed in ____________ register.
19 / 50
20 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
21 / 50
The keyboard input character scan code is received at ___ port.
22 / 50
23 / 50
NMI Stand for
24 / 50
_________ is used to identify the cause of interrupt.
25 / 50
___________ is used to identify cause of interrupt.
26 / 50
The interval timer can operate in ____modes.
27 / 50
On the execution of IRET instruction, number of bytes popped from stack is
28 / 50
There are two main types of interrupts, namely
29 / 50
The Function of I/O controller is to provide ____________.
30 / 50
The interval timer can operate in _______ modes.
31 / 50
Counter register can be used to divide clock signal.
32 / 50
________means typematic rate will be sent in next byte.
33 / 50
File can be______ viewed as collection of clusters or blocks.
34 / 50
------------ is used to set time from RTC
35 / 50
_____ bit is cleared to indicate the low nibble is being sent.
36 / 50
DSR stands for __________ .
37 / 50
To distinguish 486 with Pentium CPUID Test is used.
38 / 50
Command register is an _____ bit register
39 / 50
The service _________ is called the keyboard hook service.
40 / 50
A single interrupt controller can arbitrate among ____ different devices.
41 / 50
If CPUID instruction is not present then the processor can be a
42 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
43 / 50
44 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
45 / 50
Which port is known as Data Port______
46 / 50
DTE is ___________
47 / 50
Interrupt ______ is used to get or set the time.
48 / 50
The keyboard makes use of interrupt number _______ for its input operations.
49 / 50
Keyboard uses port ____ as status port.
50 / 50
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