Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. In the IBM/370 memory protection is offered through the use of keys. A key is a 4-bit quantity every 2K block of memory has a key (the storage key) associated with it. The CPU as well has a key (the protection key) associated with it. A store operation is permitted only if both keys are equal or if either is zero. Which of the subsequent memory-management schemes could be used successfully with this hardware?
a. Bare machine
b. Single-user system
c. A Multiprogramming with a fixed number of processes
d. A Multiprogramming with a variable number of processes
e. Paging
f. Segmentation
Answer:
a. Protection not necessary set system key to 0.
b. Set system key to 0 when in supervisor mode.
c. Region sizes should be fixed in increments of 2k bytes allocate key with memory blocks.
d. Same as above.
e. Frame sizes should be in increments of 2k bytes, allocate key with pages.
f. Segment sizes should be in increments of 2k bytes, allocate key with segments.
Explain Process scheduling Process scheduling consists of the subsequent sub-functions: 1. Scheduling : Selects the process to be implement next on the CPU 2. D
NEXT FIT ALGORITHM Here scanning starts from the first fit position and then it finds the next position which is large sufficient to hold the process. Thus the name next fit.
What is page fault and what are the steps taken by the OS to remove page fault? A page fault is caused while a page that hasn't been brought into memory is being addressed. The
Q. Provide two programming instances in which multithreading provides better performance than a single-threaded solution. Answer: (1) A Web server that services every request
What is dispatch latency? The time taken by the dispatcher to stop one process and begin another running is known as dispatch latency.
case study:interprocess communication
What is the basic approach of page replacement? If no frame is free is available, find one that is not presently being used and free it. A frame can be freed by writing its con
What are the different types of semaphore? Principally the semaphore is able to be classified into two on the basis of their values a) Counting semaphore: In counting s
Modern networks are not implemented as a single piece of software; that would render the task of dealing with multiple technologies and manufacturers virtually impossible. The solu
What is a reference string? An algorithm is evaluated by running it on a particular string of memory references and computing the number of page faults. The string of memory re
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd