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Chapter 11: MS-DOS Internals
Pg: 278
Book: Operating Systems
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∙ 13y ago
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Is A query datasheet is called a logical view of the data because a query does not physically store the data as it is still stored in the tables?
Yes, that is correct. A query datasheet presents a logical view of the data because it displays the information based on the query conditions without physically storing it. The data itself remains stored in the underlying tables of the database.
What is view of data in dbms?
In a database management system (DBMS), a view is a virtual table derived from one or more base tables. It allows users to query or manipulate data without directly accessing the underlying tables, providing a layer of abstraction and security. Views can simplify complex queries, hide sensitive information, and provide a consistent interface to the data.
Can you view data stored on an external hard drive on another PC?
Yes
What is logical file?
Logical file is a type of file that provides a view of the data stored into the Physical file. It does not contain data. A logical file contains only an index to the data stored into the physical file.
What is level data?
three levels of data abstraction are: 1. Physical level : how the data is stored physically and where it is stored in database. 2. Logical level : what information or data is stored in the database (like what is the datatype or what is format of data. 3.View level : end users work on view level. if any amendment is made it can be saved by other name. for the database to be usable it must retrieve data efficently.this efficency led designer to use complex data structure in the database
What is Data level structure?
three levels of data abstraction are: 1. Physical level : how the data is stored physically and where it is stored in database. 2. Logical level : what information or data is stored in the database (like what is the datatype or what is format of data. 3.View level : end users work on view level. if any amendment is made it can be saved by other name. for the database to be usable it must retrieve data efficently.this efficency led designer to use complex data structure in the database
What is structural level?
three levels of data abstraction are: 1. Physical level : how the data is stored physically and where it is stored in database. 2. Logical level : what information or data is stored in the database (like what is the datatype or what is format of data. 3.View level : end users work on view level. if any amendment is made it can be saved by other name. for the database to be usable it must retrieve data efficently.this efficency led designer to use complex data structure in the database
What are the steps for data recovery from a floppy disk?
The best way to recover data from a floppy disk is with floppy disk recovery software, such as Wondershare Data Recovery. Install and open the program. Locate your floppy drive and open it to view the files. You can then use the recovery program to recover any file from a floppy disk, even very badly corrupted ones.
What does Secure Data specialize in?
Secure Data specialize in keeping any business or personal data safe from unwanted viewers. It offers somewhere where data can be stored in a secure environment and anyone using it can rest assured that no unauthorized person can view any of the information stored there.
What does the Disk Management tool do?
A) It is sued to determine the amount of free space on a partition. B) It is used to view file and folder properties stored on a disk. C) It is used to display,create and remove partitions on the drives.
What does the name cache mean?
Cache means the part of PC or hard disk where data is stored for frequent use which makes the work more speedy. Our PC has hard disk space allocation for cache and windows save our recent working data there to next time use and it help to do work more faster the next time we access that data. The same way internet explorer or other browsers works. They store the recent view web sites data in cache so if next time we again want to view the same web site the next time those web sites load faster then first time.
What is VIEW in MySQL?
In databases, a view is a stored query accessible much the same way as a table. The view does not hold any data, but can be used to retrieve data from one or more tables. Views can represent a subset of the data contained in a table, can join and simplify multiple tables into a single virtual table, can aggregate table data (using sum, avg, count, etc) and can hide the complexity of data
