CS609-Midterm
1 / 50
The interval timer can operate in ____modes.
2 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
3 / 50
DCE is _____________
4 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
5 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
6 / 50
If CPUID instruction is not present then the processor can be a
7 / 50
Maximum number of interrupts in a standard PC is
8 / 50
Standard PC operates in two modes in terms of memory which are
9 / 50
If keyboard buffer is empty the head and tail points at the same location.
10 / 50
DCE stands for __________.
11 / 50
_____ bit is cleared to indicate the low nibble is being sent.
12 / 50
Interrupt service number is usually placed in ____________ register.
13 / 50
In ____________each byte is needed to be encapsulated in start and end.
14 / 50
To distinguish 486 with Pentium CPUID Test is used.
15 / 50
_______ is LED control byte.
16 / 50
Which of the following are types of ISR __________.
17 / 50
The ____________ function simply enables the self test facility within the modem control register
18 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
19 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
20 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
21 / 50
A software interrupt does not require EOI (End of interrupt).
22 / 50
REGS is a Union
23 / 50
On the execution of IRET instruction, number of bytes popped from stack is
24 / 50
BIOS DO NOT support ______.
25 / 50
By cascading two DMAs ____ bits can be transferred.
26 / 50
The Function of I/O controller is to provide ____________.
27 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
28 / 50
Register can be used to divide frequency is _________
29 / 50
DTE is ____________.
30 / 50
Software based flow control make use of -------- control characters
31 / 50
Control information in files is maintained using
32 / 50
The keyboard input character scan code is received at ___ port.
33 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
34 / 50
There are two main types of interrupts namely _________________.
35 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
36 / 50
The output on the monitor is controlled by a controller called __________within the PC.
37 / 50
PPI is used to perform parallel communication
38 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
39 / 50
At IRQ 7 Interrupt # ___ is used.
40 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
41 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
42 / 50
PPI stands for
43 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
44 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
45 / 50
There are two main types of interrupts, namely
46 / 50
Int 14H____________ can be used to send a byte
47 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
48 / 50
The keyboard makes use of interrupt number _______ for its input operations.
49 / 50
50 / 50
Int ________ is used to control the printer via the BIOS.
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