CS609-Midterm
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To distinguish 486 with Pentium CPUID Test is used.
2 / 50
Control information in files is maintained using
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An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
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If we use keep (0, 1000) in a TSR program, the memory allocated to it is
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In self test mode the output of the UART is routed to its input.
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The service _________ is called the keyboard hook service.
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DCE stands for __________.
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________means typematic rate will be sent in next byte.
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The interval timer can operate in _______ modes.
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Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
11 / 50
Operating system name contains ____ bytes in boot block.
12 / 50
There are two main types of interrupts, namely
13 / 50
A software interrupt does not require EOI (End of interrupt).
14 / 50
Display device (Monitor) performs _________ I/O.
15 / 50
Communication between keyboard and keyboard controller is __________.
16 / 50
Int ________ is used to control the printer via the BIOS.
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_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
18 / 50
Interrupt 9 usually reads the _________ from keyboard.
19 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
20 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
21 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
22 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
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PPI stands for _____________.
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The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
25 / 50
------------ is used to read time from RTC
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File system used in CD’s is_______ file system
27 / 50
Only ________ ports are important from programming point of view.
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_____ bit is cleared to indicate the low nibble is being sent.
29 / 50
In self test mode the output of the UART is routed to its input
30 / 50
Keyboard Status Byte is located at the address
31 / 50
The keyboard makes use of interrupt number _______ for its input operations.
32 / 50
The interval timer can operate in ____modes.
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LPTs can be swapped.
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Software based flow control make use of -------- control characters
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File can be______ viewed as collection of clusters or blocks.
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The keyboard input character scan code is received at ___ port.
37 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
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________ is a device incorporated into the PC to update time even if the computer is off.
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40 / 50
Interrupt service number is usually placed in ____________ register.
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IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
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Which port is known as Data Port______
43 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
44 / 50
------------ is used to read date from RTC
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------------ is used to set time from RTC
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Interrupt _____ is empty; we can use its vector as a flag.
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PPI stands for
48 / 50
Maximum number of interrupts in a standard PC is
49 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
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