Computer Terms Flashcards
What is FCFS Scheduling ?
A Form of Disk Scheduling where I/O request are serviced based on the order they were called.
What is SSTF Scheduling?
(Shortest-Seek-Time- First) A form of Disk Scheduling that services I/O request based on which one request is closest to the disk head/
What is SCAN Scheduling?
(A.K.A Elevator Algorithm) A form of Disk Scheduling where I/O request are serviced as the disk head works from one end of the disk to the other then the head movement reverses and completes the process again.
What is C-Scan Scheduling?
(Circular Scan) A Disk Scheduling Process that works similar to the elevator algorithm except instead of the disk arm movement reversing when reach one end of the disk to the other. It goes back to the the beginning end of the disk and scans repeats again .
What is Look Scheduling?
A form of Disk Scheduling where where Disk Arm searches for the next I/O request instead of leaving them to wait for the arm to to reach the other end of the disk and reverse or complete its process.
What is Low-Level Formatting (Physical Formatting)
A process that divides a blank disk into sectors that the disk controller can read and write.
What information is typically held within the data structure of a sector?
A header, a data area, and a train.
What is a Bootstrap program?
The initial program that runs when starting up or rebooting a computer by finding and loading the operating system kernel from to disk to the main memory
What is a boot partition?
A partition on a Hard Disk preserved for holding the information needed to start an operating system.
What is a Master Boot Record (MBR)
The very first sector of a hard disk that stores the boot code
What are the two distinct parts of the File System?
A collection of Files (each storing related data), and a directory structure (organizes and provides information about all the files in the system).
What is a file?
The physical properties of the operating system’s storage devices abstracted to define a logical storage unit.
What is a text file?
A sequence of characters organized into lines (and possibly pages)
What is a Source file?
A sequence of functions, each which is further organized as declarations followed by executional statements.
What is an executable file?
A series of code sections the the loader can bring into memory and execute.
