Skip to main content

Chk1


Comments

Post a Comment

Popular posts from this blog

first post

Introduction to Computer Science Fundamentals Computer Science Fundamentals chapter in PSC Syllabus, that requires good knowledge of computer history, generation, classification, computer system, hardware, software, networking, applications, safety measures and computer security issues. This study page on Computer Science Fundamentals will enable you to attempt the questions in Computer Operator Examination more confidently! Welcome to the first class of Computer Operator Exam Preparation. I am really happy to be a part of your success. Well, you saw   the syllabus! It is not difficult to understand that Public Service Commission is looking for an efficient, updated and competent candidate who knows well about the past of computers, development and its current stage. Those who studied Computer Science in high school and +2 college, it’ll be much comfortable. However, if you came from some other streams with 6 months of diploma course, you certainly ne...
Post a Comment
Read more

Optical Disks

Optical Disks More advanced technology created a new disk storage forms. Optical disk is a disk written and read by laser beam. This optical disk has a great impact on today’s storage technology. Optical disk does not spin, does not need to move access arms and read/write heads, because a laser beam can be moved electronically. The capacity of the storage is considerably greater than their magnetic disk counterparts, and optical disk storage may eventually replace all magnetic tape and disk storage. Then how do they work? To write data, a laser beam burns tiny cavities into the surface of a disk to mark bits for data. To read the data, a laser beam scans these areas. There are three forms of optical disks available: CD-ROM:   CD-ROM ( compact disk read only memory ) is an optical disk storage that contains text, graphics and hi-fi stereo sound. CD-ROM is a 4.75-inch optical disk storage that can store around 650 MB of data. CD-ROM disk is almost the same as the music CD...
Post a Comment
Read more