Computer Programming MCQs — Test 190

Correct Answer: B. B. Kernel
Explanation: The kernel is the heart of the operating system which can control the hardware and can deal with the interrupts, I/O systems, memory etc. It can also locate the parameter block by using an address pointer which is stored in the predetermined address register.

Correct Answer: D. D. Parameter block
Explanation: The kernel can locate the parameter block by using an address pointer which is stored in the predetermined address register. These parameter blocks are standard throughout the operating system, that is, they are not dependent on the actual hardware performing the physical task.

Correct Answer: C. C. Vmebus
Explanation: The software can be easily moved from one system to another which is more important for designing embedded systems, especially for those which use an industry standard bus such as VMEbus, in which the system hardware can be expanded or upgraded.

Correct Answer: D. D. Cp/m
Explanation: The first widely used operating system is the CP/M which is developed for Intel 8080 and the 8”floppy disk system.

Correct Answer: D. D. Cp/m
Explanation: The CP/M is a single task operating system, that is, only one task or an application can be executed at a time.

Correct Answer: A. A. Memory
Explanation: The application program has to complete and the memory becomes a limiting factor, which can be solved by using program overlays.

Correct Answer: A. A. Semaphore
Explanation: The kernel in the real-time operating system which deals with the flag but cannot carry implicit information are called semaphores or events.

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.