CS609-Midterm
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File system used in CD’s is_______ file system
2 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
3 / 50
If CPUID instruction is not present then the processor can be a
4 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
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DCE stands for __________.
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In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
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Operating system name contains ____ bytes in boot block.
8 / 50
The Function of I/O controller is to provide ____________.
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IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
10 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
11 / 50
Timer interrupt is a _________.
12 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
13 / 50
By cascading two DMAs ____ bits can be transferred.
14 / 50
Software based flow control make use of -------- control characters
15 / 50
To distinguish 486 with Pentium CPUID Test is used.
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_____ bit is cleared to indicate the low nibble is being sent.
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There are two main types of interrupts namely _________________.
18 / 50
Counter register can be used to divide clock signal.
19 / 50
DSR stands for __________ .
20 / 50
Tail of keyboard should get to get the start of buffer.
21 / 50
In self test mode the output of the UART is routed to its input.
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23 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
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BPB stands for _________.
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_________ is used to identify the cause of interrupt.
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Control information in files is maintained using
27 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
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______ is used to set time.
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Register can be used to divide frequency is _________
30 / 50
A software interrupt does not require EOI (End of interrupt).
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The interval timer can operate in ____modes.
32 / 50
Maximum number of interrupts in a standard PC is
33 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
34 / 50
In ____________each byte is needed to be encapsulated in start and end.
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________means typematic rate will be sent in next byte.
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The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
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Command register is an _____ bit register
38 / 50
__________is used to control the printer via the BIOS
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____ No. of bytes are used to store the character in the keyboard buffer.
40 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
41 / 50
Interrupt ______ is used to get or set the time.
42 / 50
The keyboard makes use of interrupt number _______ for its input operations.
43 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
44 / 50
Which port is known as Data Port______
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46 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
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Int 14H______ can be used to set the line parameter of the UART or COM port
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Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
49 / 50
------------ is used to set time from RTC
50 / 50
A single interrupt controller can arbitrate among ____ different devices.
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