This set of Embedded Systems Multiple Choice Questions & Answers (MCQs) focuses on “Commercial Operating Systems”.
1. Which of the following kernel supports the MC68000 family?
a) pSOS+
b) pSOS+kernel
c) pNA+ network manager
d) pSOS multiprocessor kernel
View Answer
Explanation: The pSOS+ kernel supports many processor families like Intel 80×86, M88000, MC68000 and i960 processors. The kernel is small in size and has a 15-20 Kbytes RAM.
2. What is the worst case figure for interrupt latency for an MC68020 running at 25MHz?
a) 19 microseconds
b) 6 microseconds
c) 20 microseconds
d) 8 microseconds
View Answer
Explanation: The worst case figure for the interrupt latency for an MC68020 which runs at 25MHz is 6 microseconds and the context switch for the same is 19 microseconds.
3. Which of the following is the multiprocessing version of the kernel?
a) pSOS+
b) pSOS+ kernel
c) pSOS multiprocessor kernel
d) pSOS
View Answer
Explanation: The pSOS+ is a multitasking real-time kernel of the operating system and pSOS+m or the pSOS+ multiprocessor kernel is the multiprocessing version of the kernel. It is virtually same as the single processor version except the ability to send and receiving system objects from the processors within the system.
4. Which of the following is a compiler independent run-time environment for C applications?
a) pSOS multiprocessor kernel
b) pSOS
c) pSOS+
d) pREC+ runtime support
View Answer
Explanation: The pREC+ is a compiler independent runtime environment for the C program applications.
5. Which kernel provides 88 functions that can be called from the C programs?
a) pSOS multiprocessor kernel
b) pSOS
c) pSOS+
d) pREC+ runtime support
View Answer
Explanation: The pREC+ is compatible with the ANSI X3J11 and can provide the 88 functions that can be called from the C programs.
6. Which of the following is not a standalone product?
a) pREC+ runtime support
b) pSOS+m
c) pSOS+
d) pSOS+ kernel
View Answer
Explanation: The pREC+ is not a standalone product it uses pSOS+m or pSOS+ for the input/output devices and task functions and calls the PHILE+ for the file and disk I/O.
7. Which kernel allows the multiple tasks which use the same routine?
a) pREC+ runtime support
b) pSOS+m
c) pSOS+
d) pSOS+ kernel
View Answer
Explanation: The pREC+ runtime support kernel’s routines are reentrant that allows the multiple tasks to use the same routine simultaneously.
8. Which provides the TCP/IP communication over the ethernet and FDDI?
a) pSOS+m
b) pSOS+ kernel
c) pNA+ network manager
d) pSOS+
View Answer
Explanation: A pNA+ network manager is a networking option which can provide the TCP/IP communication over a large variety of media such as the FDDI and the ethernet.
Sanfoundry Global Education & Learning Series – Embedded System.
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