81. In which of the exceptions does the external event cause the exception?
a) precise
b) imprecise
c) asynchronous exception
d) synchronous exception
Answer: c
The asynchronous exception is the one in which an external event causes an exception and is independent of the instruction flow. On the other hand, the synchronous exceptions are synchronized, that is, it is caused by the instruction flow.
82. Which interrupts generate a fast interrupt exception?
a) software interrupt
b) hardware interrupt
c) internal interrupt
d) external interrupt
Answer: d
The external interrupts generate the fast interrupt routine exception in which the external interrupt is synchronized with the processor clock.
83. Which task swap method works in a regular periodic point?
a) cooperative multitasking
b) schedule algorithm
c) pre-emption
d) time slice
Answer: d
The time-slicing works by switching tasks in regular periodic points in time, that is, any task that needs to run next will have to wait until the current time slice is completed.
84. Which of the following is a part of the RTOS kernel?
a) register
b) ISR
c) memory
d) input
Answer: b
The ISR can send the message for the tasks and it is a part of the RTOS kernel.
85. Which provides the TCP/IP communication over the ethernet and FDDI?
a) pNA+ network-manager
b) pSOS+
c) pSOS+ kernel
d) pSOS+m
Answer: a
A pNA+ network manager is a networking option that can provide TCP/IP communication over a large variety of media such as the FDDI and the ethernet.
86. What limits the amount of virtual memory in Windows 3.1?
a) static file
b) dynamic file
c) nature of swap file
d) size of the swap file
Answer: d
The swap file of Windows 3.1 has a size of 25 Mbytes and thus limits the amount of virtual memory that it can support.
87. Which one of the following offers CPUs as integrated memory or peripheral interfaces?
a) Memory system
b) Embedded system
c) Microcontroller
d) Microprocessor
Answer: c
Microcontrollers are the CPUs that have integrated memory and peripherals but microprocessor possesses external chips for memory.
88. Which algorithm is based on Jackson’s rule?
a) EDF
b) LST
c) LL
d) EDD
Answer: d
The EDD or earliest due date is based on Jackson’s rule. Jackson’s rule states that for a given set of n independent tasks, any algorithm that executes the tasks in the order of nondecreasing deadlines is optimal with respect to reducing the maximum lateness. EDF is the earliest deadline first, LL is the least laxity and the LST is the least slack time first.
89. Which of the following does not have the ability to get hundred individual signal cables into the probe in the emulation technique?
a) JTAG
b) ICE
c) BDM
d) OnCE
Answer: b
The in-circuit emulation does not have the ability to get a hundred individual signal cables into the probe. This problem comes under the physical limitation of the probe, that is as the density of the processor increases the available sockets which provide good electrical contacts is becoming harder which causes a restriction to the probe.
90. Which technique can solve the errors in the linear buffer?
a) low and high watermark
b) pointer
c) high watermark
d) low watermark
Answer: a
The errors in the linear buffering include the loss of data, especially during the regular sampling which can be avoided by the pointers that are checked against certain values and this result is used for fetching more data. These points are known as the low watermark and the high watermark.
91. Which buffering mechanism is common to the SPOX operating system?
a) directional buffer
b) linear buffer
c) single buffer
d) buffer exchange
Answer: d
The buffer exchange can support the SPOX operating system which is used for the digital signal processors and it is easy to implement.
