Are computer files physical?
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Are computer files physical?
For a hard drive, any “object” (like a movie, picture, document, sound file, etc) is stored as information. This information is stored as a series of 0’s and 1’s called bits. Each bit is physically stored as an “up” or “down” magnetization of a small piece of magnetic material.
How much physical space does a terabyte take up?
So how many gigabytes or megabytes are in a terabyte? 1 TB equals 1,000 gigabytes (GB) or 1,000,000 megabytes (MB). Now, let’s compare that to physical storage devices we use everyday. Compared to the average smartphone, 1 TB of storage is the same as roughly 8 (128 GB) iPhones or Samsung Galaxy devices.
What happen if you move a file?
If you move a file to change just its name, or move it to another directory on the same disk, the data remains in place and only the pointers to it change. If you move a file to a different disk (including a different disk partition), the data is copied to the new physical location.
What is the difference between physical file and logical file?
They contain a description of records that are found in one or more physical files. A logical file is a view or representation of one or more physical files….Logical File –
| Physical File | Logical File |
|---|---|
| It occupies the portion of memory. It contains the original data. | It does not occupy memory space. It does not contain data. |
What are the disadvantages of computerized file?
Disadvantage of File-oriented system:
- Data Redundancy: It is possible that the same information may be duplicated in different files.
- Data Inconsistency:
- Difficulty in Accessing Data:
- Limited Data Sharing:
- Integrity Problems:
- Atomicity Problems:
- Concurrent Access Anomalies:
- Security Problems:
What is record difference between logical and physical record?
A physical record often is unstructured and has a fixed size related to the kind of physical media that stores it, and possibly to the location of the record on the media. A logical record often is structured (has various program-specific fields) and might be stored in some number of full or partial physical records.
Is responsible for establishing the connection between logical and physical files?
A Database Management System (DBMS) is a software that enables users to create and maintain a database. The DBMS is responsible for handling this logical structure of database objects and saving them on physical files.