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7:30 PM
21
Aug2019
History of Operating System
Rajkumar Lama 8/21/2019
In this section we take a brief look at the history of operating system which is almost the same as looking at the history of computers.
First Generation (1945-1955)
During second second world wa...
9:36 AM
21
Aug2019
Race Condition (Operating System)
Rajkumar Lama 8/21/2019
Race conditions are situations where two or more processes reads or writes some shared data at the same time and the final result is incorrect.
Final result may be different according to order ...
8:35 AM
21
Aug2019
Process and Thread its Difference in CPU (Operating System)
Rajkumar Lama 8/21/2019
Process
Process is a program that is ready for execution in CPU. When a program is loaded into memory, it becomes ready for execution and competes with other process to access CPU. Thus when ...
5:37 AM
20
Aug2019
Associative Memory (Computer Architecture)
Rajkumar Lama 8/20/2019
Traditional memory stores data at a specific address and "recalls" that data later if the address is specified. Instead of an address, associative memory can recall data if a small portion o...
6:50 AM
21
Aug2019
Deadlock, Necessary Conditions of Deadlock/Characterization, Deadlocks Handling, Prevention, Avoidance in OS
Rajkumar Lama 8/21/2019
In a multiprogramming environment, several processes may compete for a finite number of resources. A process requests resources; if the resources are not available at that time, the process enters int...
6:39 PM
21
Aug2019
What is Segmentation? (Operating System)
Rajkumar Lama 8/21/2019
Paged virtual memory is one-dimensional in which virtual addresses goes from 0 to some maximum address
A segment is a logical entity. It might contain a procedure, or an array, or a stack, or a colle...
6:21 PM
21
Aug2019
Deadlock Detection and Recovery (Operating System)
Rajkumar Lama 8/21/2019
If a system does not employ either a deadlock-prevention or a deadlock-avoidance algorithm, then a deadlock situation may occur. In this environment, the system must provide:
An algorithm that examin...
9:43 AM
21
Aug2019
Critical Section (Operating System)
Rajkumar Lama 8/21/2019
One way to avoid race conditions is not to allow two processes to be in their critical sections at the same time.
Critical section is the part of the process that accesses a shared variable.&n...
9:09 AM
21
Aug2019
System Calls (Operating System)
System calls are the interface between the operating system and the user programs. Access to the operating system is done through system calls.
Each system call has a procedure associated with it so ...
7:30 PM
21
Aug2019
History of Operating System
Rajkumar Lama 8/21/2019
In this section we take a brief look at the history of operating system which is almost the same as looking at the history of computers.
First Generation (1945-1955)
During second second world wa...
9:36 AM
21
Aug2019
Race Condition (Operating System)
Rajkumar Lama 8/21/2019
Race conditions are situations where two or more processes reads or writes some shared data at the same time and the final result is incorrect.
Final result may be different according to order ...
8:35 AM
21
Aug2019
Process and Thread its Difference in CPU (Operating System)
Rajkumar Lama 8/21/2019
Process
Process is a program that is ready for execution in CPU. When a program is loaded into memory, it becomes ready for execution and competes with other process to access CPU. Thus when ...
5:37 AM
20
Aug2019
Associative Memory (Computer Architecture)
Rajkumar Lama 8/20/2019
Traditional memory stores data at a specific address and "recalls" that data later if the address is specified. Instead of an address, associative memory can recall data if a small portion o...
6:50 AM
21
Aug2019
Deadlock, Necessary Conditions of Deadlock/Characterization, Deadlocks Handling, Prevention, Avoidance in OS
Rajkumar Lama 8/21/2019
In a multiprogramming environment, several processes may compete for a finite number of resources. A process requests resources; if the resources are not available at that time, the process enters int...
6:39 PM
21
Aug2019
What is Segmentation? (Operating System)
Rajkumar Lama 8/21/2019
Paged virtual memory is one-dimensional in which virtual addresses goes from 0 to some maximum address
A segment is a logical entity. It might contain a procedure, or an array, or a stack, or a colle...
6:21 PM
21
Aug2019
Deadlock Detection and Recovery (Operating System)
Rajkumar Lama 8/21/2019
If a system does not employ either a deadlock-prevention or a deadlock-avoidance algorithm, then a deadlock situation may occur. In this environment, the system must provide:
An algorithm that examin...
9:43 AM
21
Aug2019
Critical Section (Operating System)
Rajkumar Lama 8/21/2019
One way to avoid race conditions is not to allow two processes to be in their critical sections at the same time.
Critical section is the part of the process that accesses a shared variable.&n...
9:09 AM
21
Aug2019
System Calls (Operating System)
System calls are the interface between the operating system and the user programs. Access to the operating system is done through system calls.
Each system call has a procedure associated with it so ...
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