CS609-Midterm
1 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
2 / 50
PPI stands for _____________.
3 / 50
In self test mode the output of the UART is routed to its input.
4 / 50
Each paragraph in keep function is ____ bytes in size.
5 / 50
_______ is LED control byte.
6 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
7 / 50
_____ bit is cleared to indicate the low nibble is being sent.
8 / 50
File system used in CD’s is_______ file system
9 / 50
10 / 50
DSR stands for __________ .
11 / 50
Operating system name contains ____ bytes in boot block.
12 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
13 / 50
To store each character in keyboard buffer ____ bytes are required.
14 / 50
The ____________ function simply enables the self test facility within the modem control register
15 / 50
To distinguish 486 with Pentium CPUID Test is used.
16 / 50
Hardware Interrupts are __________.
17 / 50
Interrupt ______ is used to get or set the time.
18 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
19 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
20 / 50
Interrupt service number is usually placed in ____________ register.
21 / 50
Only ________ ports are important from programming point of view.
22 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
23 / 50
Tail of keyboard should get to get the start of buffer.
24 / 50
The Function of I/O controller is to provide ____________.
25 / 50
On the execution of IRET instruction, number of bytes popped from stack is
26 / 50
Which of the following are types of ISR __________.
27 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
28 / 50
The ______ service # is not used in any interrupt.
29 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
30 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
31 / 50
Register can be used to divide frequency is _________
32 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
33 / 50
The interval timer can operate in _______ modes.
34 / 50
Counter register can be used to divide clock signal.
35 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
36 / 50
By cascading two DMAs ____ bits can be transferred.
37 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
38 / 50
Display device (Monitor) performs _________ I/O.
39 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
40 / 50
DTE is ____________.
41 / 50
Keyboard Status Byte is located at the address
42 / 50
Following is not a method of I/O
43 / 50
The interval timer can operate in ____modes.
44 / 50
The keyboard input character scan code is received at ___ port.
45 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
46 / 50
_________ is used to identify the cause of interrupt.
47 / 50
______ is used to set time.
48 / 50
49 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
50 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
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