Answer: Random-access files are those file types which have the capability of being accessed anytime directly without the requirement of any other support or file.The reading and writing of data can be done from anywhere and any point of time.
Sequential-access files are those files which can be accessed only in sequential manner for the writing and reading purpose.The sequence followed is from beginning to end of file.
Performance-oriented situation requires those files in working that can perform with the superior ability to carry out the job and can be assessed easily as per demand.Thus, these features are performed by random access file as compared with sequential-access files.So, random -access files are more preferred .