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.
What is a semaphore? A semaphore 'S' is a synchronization tool which is an integer value that, apart from initialization, is accessed only by two standard atomic operations; w
i need the job to be done within 3 days
What are the requirements to be satisfied by the critical section problem? Following are the necessities to be satisfied by the critical section problem: a) Mutual exc
What is a buddy system? We are dividing the memory as powers of two therefore the division will be 2, 4, 8, 16, 32, 64, 128, 256...i.e. in powers of 2 as well as we are selecti
diffenciet between least recently used and not recently used
Essential Properties of Operating System 1. Batch: Jobs with similar needs are batched together and run through the computer as a group by an operator or automatic job sequen
What are overlays? To enable a process to be larger than the amount of memory allocated to it, overlays are used. The idea of overlays is to keep in memory only those instructi
defination
Q. What is the basic function of Assembler ? Input to an assembler is an assembly language program. Output is an object program and information which enables the loader to prep
What are the main differences between operating systems for mainframe computers and personal computers? The design goals of operating systems for those machines are quite diffe
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