Does index take space in the disk?

Related MCQs

• There are “record-once” versions of the compact disk and digital video disk, which can be written only once; such disks are also called                      disks.
• Hybrid disk drives are hard-disk systems that combine magnetic storage with a smaller amount of flash memory, which is used as a cache for frequently accessed data.
• While inserting the record into the index, if the search-key value does not appear in the index.
• In a                clustering index, the index record contains the search-key value and a pointer to the first data record with that search-key value and the rest of the records will be in the sequential pointers.
• In a                      index, an index entry appears for only some of the search-key values.
• In                                index instead of storing all the columns for a record together, each column is stored separately with all other rows in an index.
• A                                    index is the one which satisfies all the columns requested in the query without performing further lookup into the clustered index.
• Instead of locking index leaf nodes in a two-phase manner, some index concurrency- control schemes use                        on individual key values, allowing other key values to be inserted or deleted from the same leaf.
• In a _______ clustering index, the index record contains the search-key value and a pointer to the first data record with that search-key value and the rest of the records will be in the sequential pointers.
• In a __________ index, an index entry appears for only some of the search-key values.