Contrast a LAN and a WAN. Typically, who owns and maintains a WAN?
What will be an ideal response?
A LAN is a local area network covering a limited geographic area (a room, a building, several buildings within a restricted geographic distance). Information processing units connected to a LAN are usually microcomputer-based workstations. Typically, LANs are privately owned and controlled.
When networks exceed the geographic limitations of the LAN, they are called WANs. Because of
the distances involved and the high cost of telecommunication infrastructure, WANs are often commercial networks (at least in part) that the organization leases. The nodes of a WAN may include microcomputer workstations, minicomputers, mainframes, and LANs. The WAN may be used to link geographically dispersed segments of a single organization or connect multiple organizations in a trading partner arrangement.
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Which of the following statements is false?
a. Wildcard type arguments enable you to specify method parameters, return values, variables, and so on, that act as supertypes of parameterized types. b. A wildcard-type argument is denoted by ?, which represents an “unknown type.” c. Because a wildcard is a type-parameter name, you can use it as a type name throughout a method’s body. d. If a wildcard is specified without an upper bound, then only the methods of type Object can be invoked on values of the wildcard type.
What sorting algorithm is implemented by the following function?
public class another { public static void sort(int[] a, int n) { if (n < 2) { return; } int mid = n / 2; int[] l = new int[mid]; int[] r = new int[n - mid]; for (int i = 0; i < mid; i++) { l[i] = a[i]; } for (int i = mid; i < n; i++) { r[i - mid] = a[i]; } sort(l, mid); sort(r, n - mid); concat(a, l, r, mid, n - mid); } } a. Merge sort b. Bubble sort c. Quick sort d. Selection sort
When converting analog voice data to digital signals, Pulse Code Modulation typically samples the incoming voice signal _______ times per second.
a. 8,000 b. 8 c. 18,000 d. 64 e. 256
The ____ doctrine obligates private speech conduits, even if privately owned, to facilitate the expression of others.
A. fairness B. must-carry obligation C. public forum D. common carriage