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 root partition The root partition,which have the operating-system kernel and potentially other system files, is mounted at boot time. In successful mount operation, ope
What is the purpose of system programs? System programs can be thought of as bundles of useful system calls. They give basic functionality to users and so users do not require
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
What is the information associated with an open file? Various pieces of information are associated with an open file which may be: File pointer Disk location of th
Front page We need to continue or customization and documentation of our system. Currently our system boots into runlevel 5 and we need it to boot into runlevel 3. For future r
As mentioned above, page tables, are lookup tables mapping a process' virtual pages to physical pages in RAM. How would one implement these page tables? The most straightforward
Case laws related to accounting for investment
For the heat conduction problem, investigate the effects on the numerical solution of the following aspects: 1. non-uniform meshes with re?nement at both ends versus a uniform m
examples of classification of models
What is Directory? The device directory or simply called as directory records information-such as name, location, size, and type for all files on that certain partition. The d
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