CS609-Midterm
1 / 50
File can be______ viewed as collection of clusters or blocks.
2 / 50
In self test mode the output of the UART is routed to its input
3 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
4 / 50
DSR stands for __________ .
5 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
6 / 50
A single interrupt controller can arbitrate among ____ different devices.
7 / 50
To distinguish 486 with Pentium CPUID Test is used.
8 / 50
______ is Disk interrupt.
9 / 50
_________ is used to identify the cause of interrupt.
10 / 50
On the execution of IRET instruction, number of bytes popped from stack is
11 / 50
Interrupt _____ is empty; we can use its vector as a flag.
12 / 50
Only ________ ports are important from programming point of view.
13 / 50
In self test mode the output of the UART is routed to its input.
14 / 50
A software interrupt does not require EOI (End of interrupt).
15 / 50
DTE is ___________
16 / 50
Interrupt 9 usually reads the _________ from keyboard.
17 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
18 / 50
LPTs can be swapped.
19 / 50
The keyboard makes use of interrupt number _______ for its input operations.
20 / 50
Counter register can be used to divide clock signal.
21 / 50
_____ bit is cleared to indicate the low nibble is being sent.
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23 / 50
PPI is used to perform parallel communication
24 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
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PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
26 / 50
Int 14H __________ can be used to receive a byte.
27 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
28 / 50
In ____________each byte is needed to be encapsulated in start and end.
29 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
30 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
31 / 50
There are two main types of interrupts namely _________________.
32 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
33 / 50
Which port is known as Data Port______
34 / 50
Command register is an _____ bit register
35 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
36 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
37 / 50
DTE is ____________.
38 / 50
Hardware Interrupts are __________.
39 / 50
________means typematic rate will be sent in next byte.
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______ is LED control byte.
41 / 50
The interval timer can operate in _______ modes.
42 / 50
BPB stands for _________.
43 / 50
The ____________ function simply enables the self test facility within the modem control register
44 / 50
The Function of I/O controller is to provide ____________.
45 / 50
PPI stands for _____________.
46 / 50
There are two type of communication synchronous and Anti Synchronous
47 / 50
48 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
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50 / 50
Operating system name contains ____ bytes in boot block.
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