Cache replacement policies, The physical memory acts as a cache backed by t...

The physical memory acts as a cache backed by the disk. When the physical memory is full, and we want to read in another page from disk, we have to evict a page from physical memor

What are a safe state and an unsafe state, What are a safe state and an uns...

What are a safe state and an unsafe state? Answer:  A state is safe if the system can allocate resources to every process in some order and still avoid a deadlock. A system is

What is a thread, What is a thread? A thread or else called a lightweig...

What is a thread? A thread or else called a lightweight process (LWP) is a basic unit of CPU utilization, it comprises of a thread id, a program counter, a register set and a s

Identifying parallelism, Identifying parallelism A formal way to identi...

Identifying parallelism A formal way to identify parallelism in an activity is to draw a task dependence graph in a directed graph in which each vertex represents a task to

Buffer, What is bounded buffer

What is bounded buffer

Mutual exclusion variable, Since each thread has its own processing space t...

Since each thread has its own processing space therefore communication between threads will need to be done through a common global variable. Since multiple threads can access the

Direct memory access, A-  In a table format, compare between Programmed I/O...

A-  In a table format, compare between Programmed I/O, Interrupt -driven I/O, and Direct Memory Access (DMA) in terms of basic idea, Advantages, disadvantages, and the operating en

PSEUDO CODE FOR PROGRAM, THE PROGRAM WILL CHOOSE TWO RANDOM NUMBERS,THEN PR...

THE PROGRAM WILL CHOOSE TWO RANDOM NUMBERS,THEN PRINT THEM OUT AS AN ADDITION PROBLEM.THE PROGRAM WILL THEN ASK THE USERTO ENTER THE CORRECT ANSWER.IF THE ANSWER IS CORRECT,THE PRO

Buffering,

Linux kernel components, Example 1.  The diagram illustrating the data stru...

Example 1.  The diagram illustrating the data structures of in-memory VFS objects and on-disk objects and their relationships on slide 24 of the lecture notes OSD.4. This diagram i