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What a programmer should know about memory? by 13745 on Tue Mar 31, 2015 4:07 pm
Memory:
The computer memory is a temporary storage area. It holds the data and instructions that the Central Processing Unit (CPU) needs. Before a program can be run, the program is loaded from some storage medium into the memory. This allows the CPU direct access to the program. Memory is a need for any computer.
Types:-
Memory is primarily of three types.
a) Cache Memory
b) Primary Memory/Main Memory
c) Secondary Memory

Cache...

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Practical approach to Object Oriented Programming by 13745 on Wed Apr 01, 2015 1:57 pm


Object-oriented programming:-
Object-oriented programming language (OOPL) is a high-level programming language based on the object-oriented programming (OOP) model.
OOPL incorporates logical classes, objects, methods, relationships and other processes with the design of software and applications.
Example:-
1.Java
2.C language
3.C++
4.Smalltalk
5.PHP etc.

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Introduction to Operating System by 13745 on Mon Mar 30, 2015 1:58 pm
Introduction to Operating system

OPERATING SYSTEM:

Definition:-
Operating system is software that works as an interface between a user and the computer hardware.

Example:-
There are following some examples of OS.
a) UNIX
b) LINUX
c) MS-DOS
d) MS WINDOWS -98/XP/Vista
e) Windows NT/2000,
f) Window 7 & 8 etc.



Explanation:-
•OS performs the basics tasks such as receiving input from keyboard, processing instructions and sending output to the screen.
•OS manages overall activities of computer and input/output devices attached to it.
•It is software that is required in order to run application programs and utilities.
•It works as a bridge to perform better interaction between application programs and hardware of computer.
•It manages t...

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SCHEDULERS AND ITS TYPES by bina satti on Wed Apr 01, 2015 7:44 pm
SCHEDULERS AND ITS TYPES
Scheduler is a computer programming system consisting of software design pattern. It helps in execution of concurrent assigned codes.it helps in multitasking because now a days due to increase in advancement such multitasks are acquired. The read/write lock pattern is implemented using scheduler pattern to make sure fair scheduling, Schedule is basically completeness of execution per unit time known as throughput, latency (specifically the turnaround time, as a total time between submission of a process and its completion and the response time, as a time from submission of a process to the first time it is scheduled. fairness (equal CPU time to each process
TYPES OF SCHEDULER
Process scheduler
The process scheduler is a part of the operating system that decides which process runs at a certain point in time.it is a cooperative scheduler as we can pause, move on and can start new process....

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Types of scheduler by affiaaslam on Tue Mar 31, 2015 6:46 pm
Scheduler:
Scheduling is referring to set of policies and mechanism to control the work which is performed by a computer system. Of all the resources in a computer
System that is scheduled before use, the CPU is by far the most important.
Multi programming is the (efficient) scheduling of the cpu. In multi programming systems, when there is more than one run able process. the operating
system must decide which one to activate. The decision is made by the part of the operating system which is called scheduler, using a scheduling algorithm. The first Scheduling algorithm is Non-preemptive First-Come-First-Served (FCFS) and Shortest Job first (SJF) which is Good for ‘ ‘background’ ’ batch jobs..and second algorithm preemptive[ which includes • Round-Robin (RR) and . Priority which is Good for ‘ ‘foreground’ ’interactive jobs. The scheduler is concerned with deciding policy, not providing a mechanism. A scheduler is designed to select one or more primary performance criteria. One pro...

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