A block that is not allowed to be written back to disk is said to be                              

Related MCQs

• The                                policy, allows a transaction to commit even if it has modified some blocks that have not yet been written back to disk.
• 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.
• If no header is specified, the block is said to be an                                PL/SQL block.
• 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.
• Which level of RAID refers to disk mirroring with block striping?
• A major goal of the database system is to minimize the number of block transfers between the disk and memory. This is achieved by
• In the buffer where there is no space for another block, the block can be inserted using
•                                        frees the space occupied by a block as soon as the final tuple of that block has been processed.
• When transaction Ti requests a data item currently held by Tj, Ti is allowed to wait only if it has a timestamp smaller than that of Tj (that is, Ti is older than Tj). Otherwise, Ti is rolled back (dies). This is
• When transaction Ti requests a data item currently held by Tj, Ti is allowed to wait only if it has a timestamp larger than that of Tj (that is, Ti is younger than Tj ). Otherwise, Tj is rolled back (Tj is wounded by Ti). This is