CS609-Midterm
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________ is a device incorporated into the PC to update time even if the computer is off.
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File system used in CD’s is_______ file system
3 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
4 / 50
A single interrupt controller can arbitrate among ____ different devices.
5 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
6 / 50
UART stands for_______
7 / 50
There are two main types of interrupts, namely
8 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
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______ is Disk interrupt.
10 / 50
At IRQ 7 Interrupt # ___ is used.
11 / 50
The keyboard makes use of interrupt number _______ for its input operations.
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Operating system name contains ____ bytes in boot block.
13 / 50
PPI is used to perform parallel communication
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We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
15 / 50
Int ________ is used to control the printer via the BIOS.
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17 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
18 / 50
Timer interrupt is a _________.
19 / 50
DTE is ___________
20 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
21 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
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23 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
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Interrupt ______ is used to get or set the time.
25 / 50
DSR stands for __________ .
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The -------- function receive a byte and COM port number is passed as parameter using BIOS service
27 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
28 / 50
BIOS support _____________UARTS as COM ports.
29 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
30 / 50
_____ bit is cleared to indicate the low nibble is being sent.
31 / 50
On the execution of IRET instruction, number of bytes popped from stack is
32 / 50
In self test mode the output of the UART is routed to its input
33 / 50
34 / 50
If keyboard buffer is empty the head and tail points at the same location.
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The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
36 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
37 / 50
Maximum number of interrupts in a standard PC is
38 / 50
By cascading two DMAs ____ bits can be transferred.
39 / 50
________means typematic rate will be sent in next byte.
40 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
41 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
42 / 50
Int 14H __________ can be used to receive a byte.
43 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
44 / 50
Interrupt service number is usually placed in ____________ register.
45 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
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PPI stands for
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48 / 50
Which of the following are types of ISR __________.
49 / 50
Standard PC can have _____ PPI.
50 / 50
Interrupt _____ is empty; we can use its vector as a flag.
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