Discuss fiber-optic cable, including its advantages and disadvantages.
What will be an ideal response?
Student responses will vary, but should be drawn from the following information from the text.
The core of a fiber-optic cable consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals. Each strand, called an optical fiber, is as thin as a human hair. Inside the fiber-optic cable, an insulating glass cladding and a protective coating surround each optical fiber.
Fiber-optic cables have the following advantages over cables that use wire, such as twisted-pair and coaxial cables:
• Capability of carrying significantly more signals than wire cables
• Faster data transmission
• Less susceptible to noise (interference) from other devices, such as a copy machine
• Better security for signals during transmission because they are less susceptible to noise
• Smaller size (much thinner and lighter weight)
Disadvantages of fiber-optic cable are it costs more than twisted-pair or coaxial cable and can be difficult to install and modify. Despite these limitations, many phone companies replaced original analog phone lines with fiber-optic cables, enabling them to offer fiber Internet access to home and business users. Businesses also use fiber-optic cables in high-traffic networks or as the backbone in a network.
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A switch statement does not have a case that matches the value of the expression, and it does not have a default case. What happens?
a) The first case will be executed because there is no default case. b) The last case will be executed because there is no default case. c) The case whose value is closest to the expression will be executed. d) None of the cases will be executed. e) An execution error will occur if there is no matching case and no default case.
Modify the definition of the class Species in Listing 5.19 of Chapter 5 by removing the method setSpecies and adding the following methods:
• Five constructors: one for each instance variable, one with three parameters for the three instance variables, and a default constructor. Be sure that each constructor sets all of the instance variables. • Four methods named set that can reset values: one is the same as the method setSpecies in Listing 5.16, and the other three each reset one of the instance variables. Then write a test program to test all the methods you have added. Finally, repeat Practice Program 1 in Chapter 5, but be sure to use some constructor other than the default constructor when you define new objects of the class Species. This project requires the development of test cases that exercise each of the new constructors and methods at least once.
A ________ is a macro that is triggered by events, such as adding, updating, or deleting data within a table, form, or query
Fill in the blank(s) with correct word
A class diagram resembles a horizontal flowchart that shows the actions and events as they occur.
Answer the following statement true (T) or false (F)