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Operating System: Case Study 6

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Diagram 1.1: The Process State In the Process State diagram, jobs move through the system. There are five stages Hold, Ready, Waiting, Running, and Finished. When a process is first created, it occupies the hold state. In this state, the process awaits admission to the "ready" state. This admission will be approved or delayed by process scheduler. Typically in most desktop computer system, this admission will be approved automatically; however for real time operating systems this admission may be delayed. In the Reading process has been loaded into main memory and is awaiting execution on a CPU (Central Processing Unit). There may be many "ready" processes at any one point of the system execution. For example, in a one processor system, only one process can be executing at any one time, and all other "concurrently executing" process will be waiting for execution. While in the Running process is a process which is currently executing on a CPU. From thi...

Operating System: Case Study 5

There are two methods for free space allocation. First-fit memory allocation leads to fast allocation of memory space because first partition fitting the requirement. In the first loading of jobs, Job 1 which contains 100k that will search in the memory blocks to be allocated. Since Job 1 with 100k with 3 turnarounds can not be accommodate with Block 1 because of insufficient memory size. By that Job 1 will search again in the table of memory blocks. Job 1 found out that Block 2 with 200k is available for accommodation. So now, Job 1 is in Block 2. Job 2 with 10k with 1 turnaround searches for available block. Since first-fit allocation makes fitting its requirement, Job 2 will be accommodated by Block 1 with 50k. Job 3 with 3k and 2 turnaround will search in the memory blocks and found out that Block 3 with 70k is ready for accommodation. Job 4, will do the same thing, Block 4 is ready for accommodation so Job 4 is settled in Block 4. However, Job 5 is too large with 23k with 2 turna...

Operating System: Case Study 4

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Dynamic Partitions Jobs are being load to the Memory blocks. Memory size of 220k with the Operating System of 15k.   Note: Job 9 and Job 10 are not allowable to load for it is because of poor-size. Relocatable Dynamic Partitions Jobs are being load to the Memory blocks. Memory size of 220k with the Operating System of 15k.    

Maghintay

Ano itong aking nararamdaman? Maski sarili ko'y di ko maintindihan Masaya na malungkot.. Ah ewan! Basta! Lahat ng ito'y kagustuhan Hindi ako nagsisisi sa aking ginawa Pag-aalinlangan sa sarili biglang nawala Mga nararamdaman na sa puso nagsimula Tinapos at tinuldukan ng utak ko bigla Ito'y aking ginawa kahit ako'y nasaktan Upang mga katanungang ito'y kusa nang lumisan Na hindi masagut-sagot noon Ngunit burado na lahat ngayon Ngayon ko lang napagtanto Hindi pala lahat para sayo May mga taong sadyang di' ka gusto Kaibigan lamang talaga ang siyang turing sayo May mga taong para naman sayo Ang tamang gawin lang ay maghintay ng tamang tyempo Tamang oras.. Tamang panagon.. Tiyak ko, darating din iyon!

Opearting Systems: Case Study 3

In a multiprogramming and time sharing environment, several users share a system simultaneously. In effect, security problems may arise in this kind of system. A good example are copying or cloning a user's files and by hacking the system. This phenomenon leads to the ineffectiveness and reliability of multiprogramming and time sharing environment. However, exploiting this security problems, let us have first the definition of the two terms used which we are referring this security problems. Multiprogramming is the allocation of a computer system and its resources to more than one concurrent or existing application, job or user. And for time sharing systems or environment is the sharing of a computing resources among many users by means of multiprogramming and multitasking. It was introduced in the 1960's time, and emergence as the prominent model of computing in the 1970's period time. Now, unfolding the first security problem occurred in multiprogramming and time sharin...

Opearating Systems: Case Study 2

Hand-held devices are pocket-sized computing devices, typically having a display screen with touch input and/or miniature keyboard. Hand-held devices have become constructed for use in mobile field management situations to record information in a certain kind of field. They are used to achieve a variety of tasks for increasing efficiency that includes digital notes, sending and receiving invoices, asset management, recording signatures, managing parts and scanning  bar codes . Hand-held computers used at work have  molded  overtime into a variety of form factors, including Smartphones on the low end, hand-held PDA's and Tablet PC's. This widespread existence of hand-held devices is used for many people, including a certain work or job like the doctors as medical practitioners and a supermarket manager. Supermarket managers are responsible for the operation of the unit, all departments, sanitation standards, performance results, expense control and providing direction, mo...

Songs of my Life

If destiny says so... I. As I lay dying on my bed Some thoughts of you runs through my head As darkness comes crawling on my veins Jealousy and insanity reigns I wanna walk away to see who will follow To stay with me until the end of tomorrow I wanna cry to see who will wipe away the tears To protect and defend me, and to draw away my fears Chorus: Seasons may pass Still I know my love will last For I've always been true In every action I do Promise me you'll stay I don't want you to go away But I'm willing to let you go If destiny says so.. II. I feel uncertain Thinking of what's gonna happen Worrying about the future The fear of losing you, I can't endure I can't help but cry I keep on wondering why Why do you have to leave me? It's hard to accept the reality