A network where every user is physically connected to a central controller is
a. a circuit-switched network
b. a packet-switched network
c. a star network
d. a mesh network
c. a star network
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Keys are often used in linked lists because:
A. without a software key, a linked list is locked to all clients and, therefore, rendered unusable B. the values of the keys need to be duplicated in many of the nodes C. we often need to search for nodes of interest, and we find that node by looking for some particular value in the node, usually a key D. then, the client does not need to pass in a key as a parameter
Explain what is meant by the constrained write rule, and explain how to test whether a schedule is serializable under the constrained write rule. Using the above method, determine whether the following schedule is serializable:
S = [R 1 (Z), R 2 (Y), W 2 (Y), R 3 (Y), R 1 (X), W 1 (X), W 1 (Z), W 3 (Y), R 2 (X), R 1 (Y), W 1 (Y), W 2 (X), R 3 (W), W 3 (W)] where R i (Z)/W i (Z) indicates a read/write by transaction i on data item Z.
Properties are characteristics that define a field or other control
Indicate whether the statement is true or false
A(n) ____ is a weakness or fault in the mechanisms that are intended to protect information and information assets from attack or damage.
A. threat B. exploit C. vulnerability D. risk