July 11 - Assignment and DQ Responses

Subject: Modern Operating Systems – DQ Response

Q1. Read the below paragraph and write your opinion

Note: 150 words with intext citations and references must.

Page in PMT is a unit of job, where each job is divided into equal sizes. When the section of main memory is of equal size to that of a page size, it is called as page frame and the section of magnetic disks are called as sectors. The PMT scheme works perfectly when the page, page frame, and sectors are of the same size. The exact size which is the number of bytes that can be stored in each of  them is usually determined by the disk’s sector size. Therefore, one sector will hold  one page of job instructions and fit into one-page frame of memory, but because this is the smallest addressable chunk of disk storage, it isn’t subdivided even for very tiny job (Mchoes. A and Flynn. M, 2013). So we can hereby say that a PMT is a data structure which keeps track of the relation between a page, page frame and sectors in a physical memory. Logical address or virtual address is the address of a page and physical address is the address of a frame. The PMT contains information like page number and memory address, the logical address is converted to physical address and the value is entered in the table. Basically the size of logical address is greater than that of physical address therefore only few pages are stored in physical memory, and we use the page mapping in order to keep the page in corresponding page frame. Logical address is divided into page number and offset where it points to a page table and mapping is obtained. This mapping is stored in the main memory.

Subject: Internship

Q2. Read the below paragraph and write your opinion

Note: 150 words with intext citations and references must.

The sudden coronavirus outbreak shows that corporate business disruption may occur quickly and without warning. Whether the network disruption is due to power outage, natural disasters or cyber security incidents, businesses need to ensure their capability to continue their business during the crisis. One way to help keep the business growing is to develop a disaster recovery plan.

In the company I am working for, the formal disaster recovery plan exists and is updated at least annually, and the plan owner is identified. A disaster recovery test is performed at least once a year and the test plan is revised as needed. The data centers and facilities are run by qualified third parties, and they have restricted measures to prevent or mitigate crisis outages. Internally, selected production data centers have a fully-functioning Disaster Recovery site with reserved infrastructure. A full data backup is done on a daily basis. The backups are replicated to a secondary site and are kept for the last two weeks. Our ERP software is maintained by the manufacturing company, and is kept up-to-date and inspected periodically.