Autonumber
Autonumber
An associative array is one of a number of array-like data structures where the indices are not limited to integers.
Data Point
Anomalous Data
The ________________ of the ungrouped data is the value that most frequently appears in a set of data.
It is the mean average of number of collected data values.
Sequential data is what uses access. This is used in science.
sequential access
Random Access & Sequential Access
a sequential access is when one have to go though all the data to retrieve the data wanted therefore it is time consuming
To access a particular data item in a sequential file, you need to read in all items in the file prior to the item of interest. This works acceptably well for small data files of unstructured data, but for large, structured files, this process is time-consuming and wasteful. Sometimes, we need to access data in non-sequential ways. Files which allow non-sequential access are random access files.
, Both terms "direct access" and "sequential access" as you must have guessed refer to accessing schemes in the file system. In broadest sense difference between these two can be stated like this -In sequential access data is stored at random locations. -In direct access data is stored at sequential locations. ( Ironically this is true No matter what kind of first impression we get when we hear it for the first time. ) -In sequential access addition of data is fast but retrieval of data is slow. -In direct access addition of data is slow as reordering of data blocks may be needed to put current data block after the last used data block for the file. But retrieval of data is fast. -Data structure implementing Sequential access is linked list. -Data structure implementing Direct access is an Array. Application areas:- A situation where rate of addition of data is much larger compared to retrieval of data Sequential access is preferred, in opposite situation Direct access is more suitable. Regards, Prime There are technical explanations as to how it works, but in simple terms, direct access means going straight to the record you want, whereas sequential access means going through all records one by one until you find the one you want.
magnetic disc
The file(s) (data) which are accessed in a sequential or a orderly manner is called as a sequentially accessing a file.
a tape
the difference between them is that direct access, such as a DVD allows you to go directly to a specific piece of data using an index, whereas sequential access is when data is chronologically stored on a VCR tape or Magnetic tape, you must go through all the data before you reach the data your looking for.
The common techniques of file processing include sequential access, random access, and direct access. Sequential access involves reading data sequentially from the beginning to the end of a file. Random access allows reading data from any part of the file without having to read the preceding data. Direct access uses a key or address to locate specific data within the file.
Sequential access is a method of data access used by tape drives, whereby data is written or read sequentially from the beginning to the end of the tape or until the desired data is found. Basically, in order to read data from anywhere on a tape, you must start at the beginning of the tape and read until you come to the "sought-after" data.