Discuss what a broadband connection is, how it differs from a dial-up connection, and review the types of broadband connections.
What will be an ideal response?
Student responses will vary but should be drawn from the following information from the text.Today, users often connect to the Internet via broadband Internet service because of its fast data transfer speeds and its always-on connection. Through broadband Internet service, users can download webpages quickly, play online games, communicate in real time with others, and more.
Examples of popular wired and wireless broadband Internet service technologies for home and small business users include the following:
• Cable Internet service provides high-speed Internet access through the cable television network via a cable modem.
• DSL (digital subscriber line) provides high-speed Internet connections through the telephone network via a DSL modem.
• Fiber to the Premises (FTTP) uses fiber-optic cable to provide high-speed Internet access via a modem.
• Wi-Fi (wireless fidelity) uses radio signals to provide high-speed Internet connections to computers and devices with built-in Wi-Fi capability or a communications device that enables Wi-Fi connectivity.
• Mobile broadband offers high-speed Internet connections over the cellular radio network to computers and devices with built-in compatible technology (such as 3G, 4G, or 5G) or a wireless modem or other communications device.
• Fixed wireless provides high-speed Internet connections using a dish-shaped antenna on a building, such as a house or business, to communicate with a tower location via radio signals.
• Satellite Internet service provides high-speed Internet connections via satellite to a satellite dish that communicates with a satellite modem.
Some home users connect computers to the Internet via slower-speed dial-up access because of its lower cost or because broadband access is not available where they live. Dial-up access takes place when a modem in a computer connects to the Internet via a standard telephone line that transmits data and information using an analog (continuous wave pattern) signal.
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Define an exception class called TimeFormatException. If the user enters an illegal time, like 10:65, or even gibberish, like 8&*68, your program should throw and handle a TimeFormatException.
Write a program that converts a time from 24-hour notation to 12-hour notation. The following is a sample interaction between the user and the program: Enter time in 24-hour notation: 13:07 That is the same as 1:07 PM Again? (y/n) y Enter time in 24-hour notation: 10:15 That is the same as 10:15 AM Again? (y/n) y Enter time in 24-hour notation: 10:65 There is no such time as 10:65 Try Again: Enter time in 24-hour notation: 16:05 That is the same as 4:05 PM Again? (y/n) n End of program 1. It is helpful to follow the author's suggestion to get the normal case working first, and then add exception handling. There are a number of issues to work out to do the transformation from 24-hour to 12-hour format. The first problem is to decide how to parse the input with a colon separating the hours and minutes integers. All of the methods introduced so far parse text that is delimited with spaces. The solution used here is to read the input one character at a time and use a switch structure to convert the hours and minutes to integers. But this leads to another problem, how to deal with variations on the input format. For example, the number of hours could have zero, one or two digits, e.g. :10, 0:10, or 00:10 for ten minutes after midnight. To make the solution easier, a requirement is imposed on the input: It must be in xx.xx format, i.e. it must have two digits, a semicolon, and then another two digits. Any other format is flagged as a formatting error. So leading zeros are required for times earlier than 10:00. Another problem is obtaining and saving the input so it can be reprinted in the error message. The solution resolves this by reading in five characters individually (note the first one is with readNonwhiteChar) and any remaining characters as a string. The next steps check each character to see if they are valid: only 0, 1 or 2 are allowed for the first character, etc. Additional processing of legitimate times is needed to subtract 12 from hours that are over 12, print "noon" for 12:00, change "AM" to "PM" for hours greater than 11, and conditionally print a leading zero for minutes that are less than ten. After the code to parse and process the input is done, the easiest way to add exception handling is to modify the code in the DivideByZeroException.java and DivideByZeroExceptionDemo.java files. Just change the names in the exception definition file, replace the body of the demo file with the code developed above, and add the code in catch to get the correct printout. This is an excellent example to work on test case development since there are a number of situations that need special attention in the code. Here are some good examples: • Insufficient number of characters in hh field - should cause an exception. • 00:00 - Should print "0:00 AM". • 12:00 - Should print "12:00 noon". • 12:01 - Should print "12:01 PM". • 11:59 - Should print "11:59 AM". • 23:59 - Should print "11:59 PM". • 24:00 - Should cause an exception. • 11:60 - Should cause an exception. • Combinations with all correct values except in one of the five positions (for example, a1:15, 1a:15, 11a15, 11:a5, and 11:1a) - Should cause an exception. • A completely wrong input (for example f*!bc%) – Should cause and exception. A correct input with additional characters (for example 11:15%xyz) – Should cause an exception.
How is the CC-NUMA home-based cache coherency protocol implemented when a cache miss occurs on a read?
a) The reading node contacts the home node, which always stores the most updated version of the data item. The home node forwards the data to the requesting node. b) The reading node contacts the home node. If the data item is clean, the home node forwards it to the reading node. If the data item is dirty, the home node forwards the request to the node with the dirty copy. This node sends the data to both the home node and the requesting node. c) The reading node contacts the home node. If the data item is clean, the home node forwards it to the reading node. If the data item is dirty, the home node broadcasts a request for the dirty copy to all nodes. The node with the dirty copy sends the data to both the home node and the requesting node. d) The reading node contacts the home node. If the data item is clean, the home node forwards it to the reading node. If the data item is dirty, the home node broadcasts a request for the dirty copy to all nodes. The node with the dirty copy sends the data to the home node, which forwards it to the requesting node.
The smart guides appear ____ when the frame is touching both the left margin guide and the horizontal guide.
A. blue B. pink C. red D. green
Which manual (man) page section number is used for games?
A. 2 B. 4 C. 6 D. 8