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How is memory management done using linked lists?
Each one node of the l list will have 4 fields as follows
1-this tells whether it s a hole or a process
2-starting address of the process
node
3-length of the process, Last one will be null.
4-pointer to the next
What is a Process Control Block? Every process in the operating system is represented by a process control block as well called a task control block. It contains several pieces
Buddy system of memory allocation Free memory is used to maintain in linked lists, each of similar sized blocks. Every block is of size 2^k. When some memory is needed by a th
What are threads? A thread is alike to sequential programs. Single threads have a beginning, sequence and end. At any given point in time during the runtime of the thread there
Logical File System Responsible for providing the before discussed interface to the user including: File access. Directory operations. Security and protection.
We are use to using variables within C without thinking about where they are stored. Most variables are dynamic i.e. can change, therefore they are stored in Ram, unlike a program
EXPLAIN THE SCAN SHUDDULING WITH DIAGRAM
How do we keep track of where the free pieces of memory are? One idea is to maintain a set of linked-lists of free space; each linked-list will store free chunks of some given size
Which are the different states of a process? Different status of a process is: New: When the process is created. Running: When instructions are executed. Wait
Explain the Real Time Operating System A real-time operating system comprises definite, fixed time constraints. Processing should be done in the defined constraints, or the sys
Explain the OS/2 Operating System Like NetWare, OS/2 manage resources at three levels, as shown in Figure 4.5 Resources may be maintained at the session, process, and thread le
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