Question

Which functions allow to access a file in non-sequential or random mode?

Answer 1

Answer:

Random access refers to the ability to access data at random. The opposite of random access is sequential access. To go from point A to point Z in a sequential-access system, you must pass through all intervening points. In a random-access system, you can jump directly to point Z. Disks are random access media, whereas tapes are sequential access media.

Explanation:

Random and Sequential Describe Data Files

The terms random access and sequential access are often used to describe data files. A random-access data file enables you to read or writeinformation anywhere in the file. In a sequential-access file, you can only read and write information sequentially, starting from the beginning of the file.

Both types of files have advantages and disadvantages. If you are always accessing information in the same order, a sequential-access file is faster. If you tend to access information randomly, random access is better.

Random access is sometimes called direct access.

Answer 2

The functions read() and write() allow accessing a file in ‘random mode’.

Explanation:

• Random or non-sequential file access can be defined as a special kind of file and can be seen in almost all ‘programming languages’ like Java that allows random access to any of the locations in the file.  

• This concept is similar to ‘array data structure’. We can use read() and write () methods from these random access files.  

• Using these methods, we can read and write (on the whole) can access the ‘non-sequential files’.

Learn more about random mode

Function to access file in non sequential and random mode

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