Showthat the schedule shown in Figure 21.13 for incorrect execution at SNAP- SHOT isolation can also occur when executing at OPTIMISTIC READ COMMITTED (Section 21.2.1) and will also be incorrect.
What will be an ideal response?
The schedule can occur at OPTIMISTIC READ COMMITTED because when each
transaction performs its write, the item it wrote was not changed since it was read.
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Fill in the blank(s) with correct word
You have restored a snapshot on a VMware Workstation 12 Pro based virtual machine, only to discover that after reverting, an independent disk has not been reverted. What is the issue?
A. Independent disks are not included in snapshots. B. The disk is set to non-persistent mode, so the data stored on it is lost when the VM is powered down. C. The disk is set to persistent mode, causing the data to persist across snapshots. D. The disk is connected to another virtual machine that was not included in the snapshot.