Topic is Operating Systems.

Some questions could have multiple correct answers.

Choose all correct answers.

Some questions could have multiple correct answers Choose al correct answers . a point for each correct answer selected a hall point off for each incorrect answer selected QUESTION 1 After a fork(2) in Linux, what does the child inherit from its parent? OA. the parent's pending signal queue. OB. CPU tine counters. oc. any outstanding asynchronous I/O operations. OD. a copy of open file descriptors. QUESTION From the kernel's perspective a process is viewed in terms of what? A. the number of procedure calls that the process makes OB. the set of resources associated with the process oc. what the source code looks like before compilation D. a schedulable thread of execution QUESTIONS Threads are more efficient than processes for which activities? GA. creation OB. termination OC. synchronization (compare thread-level vs. process-level signal-wait) OD. thread context switching (scheduling from one thread to another) QUESTION 4 Which of these operating sytems is not multitasking? CA. Windows XP 08. Solaris OC. DOS OD. Mach QUESTIONS In a fully user level thread (ULT) model OA. thread scheduling is done entirely by the thread library in user space. OD. thread switching does not require kernel mode privileges. Oc. porting an application is more difficult than with kernel threads. OD. a blocking system call blocks all threads in the process. QUESTIONS The benefits of a microkernel design over a layered (monolithic) kernel design are GA. reliability OB. portability c. small footprint OD. processor performance QUESTION The nicrokernel design supports which of the following? OA. extensibility OB. flexibility OC. security OD. low memory usage for the kernel QUESTIONS Under an SMP (symmetric multi-processor) operating system, CA. the system looks like a uniprocessor system to the user. B. each CPU has its own onboard cache. oc. a CPU alerts all others if an update to its unboard cache has occurred. OD. cache coherency is an issue only if all CPUs share onboard cache. QUESTION In the various implementations of threads OA. Java VM 1.1 is a single process with user level threads. B. UNIXS (like Mac OS X) make no distinction between a process and a thread. c. Linux has a many-to-one thread to process relationship. D. The cloud Kernel has a one-to-many thread-to-process relationship