What type of file structure is most appropriate for a transaction file that keeps track of employees who clock-in and clock-out?

1.   ?    Serial file.
2.   ?    Sequential file.
3.   ?    Index sequential file.
4.   ?    Hash file.

What type of file structure is most appropriate for processing a transaction file of clock-ins and clock-outs with a master file?

1.   ?    Serial file.
2.   ?    Sequential file.
3.   ?    Index sequential file.
4.   ?    Hash file.

What type of file structure is most appropriate for a master file of employees which sometimes must be used to batch process payslips and sometimes must be searched for individual records? For example, when an employee gets promoted, their payscale needs to be changed and their individual record needs to be retrieved.

1.   ?    Serial file.
2.   ?    Sequential file.
3.   ?    Index sequential file.
4.   ?    Hash file.

Very fast access to a particular product in a product details file can be obtained using a

1.   ?    Serial file.
2.   ?    Sequential file.
3.   ?    Index sequential file.
4.   ?    Hash file.

What type of file structure is potentially the slowest to use for processing?

1.   ?    Serial file.
2.   ?    Sequential file.
3.   ?    Index sequential file.
4.   ?    Hash file.