DBMS-Physical Data Organization
DBMS-Physical Data Organization
21. A file could be made of records which are of different sizes. These records are called variable-length records.
- TRUE
- FALSE
22. Sequential file organisation is most common because it makes effective use of the least expensive secondary storage devices such as magnetic disk.
- TRUE
- FALSE
23. When using sequential access to reach a particular record, all the records preceding it need not be processed
- TRUE
- FALSE
24. In direct file processing, on an average, finding one record will require that half of the records in the file be read.
- TRUE
- FALSE
25. In a direct file, the data may be organised in such a way that they are scattered throughout the disk in what may appear to be random in order.
- TRUE
- FALSE
29. Direct access systems do not search the entire file, instead, they move directly to the needed record
- TRUE
- FALSE