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Q. How does the distinction among kernel mode and user mode function as a rudimentary form of protection (security) system?
Answer: The distinction among kernel mode and user mode provides a rudimentary form of protection in the following manner. Certain instructions could be executed merely when the CPU is in kernel mode. Likewise hardware devices could be accessed only when the program is executing in kernel mode. Control over when disrupt could be enabled or disabled is also possible only when the CPU is in kernel mode. Therefore the CPU has very limited capability when executing in user mode thereby enforcing protection of critical resources.
Question: a) Each process is represented in the operating system by a process control block (PCB). The PCB contains many pieces of information associated with a specific proce
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What are threads? A thread - sometimes called as an implementation context or a lightweight process - is a single sequential flow of control within a program. We use threads
Question: (a) Distinguish between local and active directory Group Policy in Windows Server 2008? (b) Describe the three areas of account Policies that can be managed thro
1. How is reliability enhanced with the microkernel approach to system design? 2. In a virtual machine design where guest operating systems are independent virtual machines sup
Write a XML with database with book details (BOOK ID, Title, Author, subject, publisher year, language, vendor, and price)
What are the different thread levels? There are two broad type of thread implementation: User-Level Threads -- Thread Libraries. Kernel-level Threads -- System Calls.
Define Segmentation The memory allocation method subject to “external” fragmentation is Segmentation.
What are the objectives of operating system? Objectives of OS 1. Convenience: An OS makes a computer more suitable to use. 2. Efficiency : An OS allows t
What is a path name? A pathname is the path from the root by all subdirectories to a specified file. In a two-level directory structure a user name and a file name explain a pa
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