Commercial Operating Systems — Test 1

Correct Answer: C. C. Pna+ network manager
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.

Correct Answer: A. A. Psos+
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.

Correct Answer: B. B. 6 microseconds
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.

Correct Answer: C. C. Psos multiprocessor kernel
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.

Correct Answer: D. D. Prec+ runtime support
Explanation: The pREC+ is a compiler independent runtime environment for the C program applications.

Correct Answer: D. D. Prec+ runtime support
Explanation: The pREC+ is compatible with the ANSI X3J11 and can provide the 88 functions that can be called from the C programs.

Correct Answer: A. A. Prec+ runtime support
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.

Correct Answer: A. A. Prec+ runtime support
Explanation: The pREC+ runtime support kernel’s routines are reentrant that allows the multiple tasks to use the same routine simultaneously.