Use a serialization graph to demonstrate that the schedule shown in Figure 20.4 is not conflict serializable.
What will be an ideal response?
The serialization graph has an edge
T1 ? T2
because T1 wrote x before T2 wrote it, and it has an edge
T2 ? T1
because T2 read y before T1 wrote it. Thus the graph has a cycle and the schedule is
not conflict serializable.
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The API for a class also lists the known immediate subclasses of that class.
Answer the following statement true (T) or false (F)
__________ causes the compiler to check all conversions and requires you to perform all narrowing conversions explicitly.
a) Option Explicit b) Option Strict c) Option Convert d) None of the above
The ____ point appears as a small plus sign on a selected object.
A. transformation B. axis C. animation D. registration
Match each item with a statement below.
A. any activity that represents a potential danger or attack on a system or network B. any type of network service that permits users elsewhere on a network to use the network to log on to a system as if they were attached locally while operating remotely C. an ICMP Echo-based operation used to locate active devices on a network D. the process of examining the "footprints" that an attacker leaves behind E. a special-purpose software tool that cycles through all possible TCP and UDP port addresses looking for open ports that then can be probed for access or exploited for vulnerabilities F. a manager system in a DDoS attack G. an IP attack technique whereby an impostor takes over an ongoing communications session between a client and server H. a document that represents the concrete manifestation of an organization's requirements for security practices, rules, and procedures I. a computer system deliberately set up to attract, entice, and entrap would-be attackers, often by being made to appear part of a larger network