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Implementing Protection with Virtual Memory - computer architecture:
To enable the operating system to implement protection in the VM system, the HW have to:
I. Support at least 2 modes that denoted whether the running process is a user process (executive process) or an operating system process (kernel/supervisor process).
II. Provide a part ion of the CPU state that a user process may read but not write (includes supervisor mode bit).
o Only operating system process may change page tables. Page tables are held in operating system address space thereby preventing a user procedure from changing them.
o When processes desire to share information in a restricted way, the OS have to assist them.
o The write access bit (in both the TLB and the page table) can be used to limit the sharing to only read sharing.
Q. Explain about Interlacing? Interlacing is a procedure in which in place of scanning the image one-line-at-a-time it's scanned alternatelyit implies thatalternate lines are s
Q. Explain about CD-ROM and DVD-ROM? Optical disks employ Laser Disk Technology that is the latest and most promising technology for high capacity secondary storage. Advent of
Is it true that the Logical Database reads the data from the database tables using Select Statements. Yes. We are coding that in Database part of LDB.
How WAP Gateway works? An significant feature of WAP is the maintain of telephony service integrated with micro browsing of data. aveAccess WAP Gateway functionss as a
What are qualified associations? A qualified association is an association in which an attribute known as the qualifier disambiguates the object many associated end.
A device that forwards data packet from one network to another is known as a Switch device.
Q. What is Enhanced IDE? The principle behind EIDE interface is the same as in IDE interface however this drive has capacities varying from 10.2GB to 20.5GB. The rotation speed
Q. Explain Simple Interfacing? The following is a sample of the coding, used for procedure interfacing: PUBLIC CUROFF _TEXT SEGMENT WORD PUBLIC 'CODE'
Advantages and Disadvantages of Public-key cryptography Advantages (i) Enhanced security and convenience (ii) Electronic records may be authenticated by affixing
What is swapping? A process can be swapped out temporarily of memory to a backing store and after that brought back in memory for execution as continued.
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