Access time in hard-disk - Consider a disk holding files with an average file length of 5 KB. Each file is allocated contiguously on adjacent sectors. To better utilize the disk space, it must be periodically compacted, which involves reading each file sequentially and writing it back to a new location. Assuming the standard sector size of 512, an average seek time of 50 ms, 100 sectors per tra...

Unix scripts - · Create a directory called class. · Move into that directory. · Create a text file that contains what is your absolute path, and call it paths.txt

JavaScript cookie - I need a JavaScript cookie to tell if the user has filled out a html form previously. I need to modify the form page so that when the JavaScript function has verified that all of the required fields have been filled, a cookie is added to the user's computer as if this were a real app. but its not. If the same user attempts to fill out the form a second time, the user will ...

Direct access files - Suppose a direct access file consists of sectors with 1024 byte capacity. Suppose also that records are 32 bytes long. On which logical sector do the following logical records lie? What is the relative record number in the sector? Logical record 42 Logical record 131 Logical record 32 Logical record 512

Multiprogrammed systems - In most multiprogrammed systems, user programs access memory through virtual addresses, while the operating systems uses raw physical addresses to access memory. What are the implications of this design on the initiation of I/O operations by the user program and their execution by the operating system? Please provide a detailed explanation and include all references.