Chapter 3
A chain of retail stores uses software to manage telephone calls from customers. The system was recently upgraded. Customers interacted with the original system using their phone keypad. Customers interact with the upgraded system using their voice. The upgraded system (but not the original system) stores all information from the calling session in a database for future reference. This includes the customer's telephone number and any information provided by the customer (name, address, order number, credit card number, etc.). The original system and the upgraded system are described in the following flowcharts. Each flowchart uses the following blocks. The upgraded system uses a directory containing additional information not supplied by the customer. The directory is used to help direct calls effectively. Which of the following is LEAST likely to be included in the directory?
A list of computers the company owns and the computers' corresponding IP addresses
Which of the following is NOT a benefit of collaborating to develop a computing innovation?
Collaboration eliminates the need to resolve differences of opinion.
A company that develops educational software wants to assemble a collaborative team of developers from a variety of professional and cultural backgrounds. Which of the following is NOT considered a benefit of assembling such a team?
Collaboration that includes diverse backgrounds and perspectives can eliminate the need for software testing.
In the following procedure, the parameters x and y are integers. Which of the following is the most appropriate documentation to appear with the calculate procedure?
Displays the value of (x + y) / x.The value of the parameter x must not be 0.
Three students in different locations are collaborating on the development of an application. Which of the following strategies is LEAST likely to facilitate collaboration among the students?
Having all three students write code independently and then having one student combine the code into a program
DineOutHelper is a mobile application that people can use to select a restaurant for a group meal. Each user creates a profile with a unique username and a list of food allergies or dietary restrictions. Each user can then build a contact list of other users of the app. A user who is organizing a meal with a group selects all the members of the group from the user's contact list. The application then recommends one or more nearby restaurants based on whether the restaurant can accommodate all of the group members' allergies and dietary restrictions. Suppose that Alejandra is using DineOutHelper to organize a meal with Brandon and Cynthia. Which of the following data are needed for DineOutHelper to recommend a restaurant for the group? I. Each group member's list of food allergies or dietary restrictions II. Alejandra's geographic location III. The usernames of the people on Brandon and Cynthia's contact lists
I and II only
To direct a call to the appropriate destination, which of the following input data is needed by the upgraded system that was NOT needed by the original system? I. Audio signal of the customer's voice II. The customer's keypad selection III. The customer's phone number
I only
Which of the following actions are generally helpful in program development? Consulting potential users of the program to identify their concerns Writing and testing small code segments before adding them to the program Collaborating with other individuals when developing a large program
I, II, and III
DineOutHelper is a mobile application that people can use to select a restaurant for a group meal. Each user creates a profile with a unique username and a list of food allergies or dietary restrictions. Each user can then build a contact list of other users of the app. A user who is organizing a meal with a group selects all the members of the group from the user's contact list. The application then recommends one or more nearby restaurants based on whether the restaurant can accommodate all of the group members' allergies and dietary restrictions. Suppose that Alejandra is using DineOutHelper to organize a meal with Brandon and Cynthia. Which of the following data is not provided by Alejandra but is necessary for DineOutHelper to recommend a restaurant for the group? I. Brandon's contact list II. Information about which restaurants Brandon and Cynthia have visited in the past III. Information about which food allergies and dietary restrictions can be accommodated at different restaurants near Alejandra
III only
In the following procedure, assume that the parameter x is an integer. Which of the following best describes the behavior of the procedure?
It displays true if x is negative and displays nothing otherwise.
Which of the following best describes one of the benefits of using an iterative and incremental process of program development?
It helps programmers identify errors as components are added to a working program.
In the following procedure, the parameter max is a positive integer. PROCEDURE printNums(max) { count ←← 1 REPEAT UNTIL(count > max) { DISPLAY(count) count ←← count + 2 } } Which of the following is the most appropriate documentation to appear with the printNums procedure?
Prints all positive odd integers that are less than or equal to max.
Which of the following is a true statement about program documentation?
Program documentation is useful during initial program development and also when modifications are made to existing programs.
In the following procedure, the parameter numList is a list of numbers and the parameters j and k are integers. PROCEDURE swapListElements(numList, j, k) { newList ←← numList newList[j] ←← numList[k] newList[k] ←← numList[j] RETURN(newList) } Which of the following is the most appropriate documentation to appear with the swapListElements procedure?
Returns a copy of numList with the elements at indices j and k interchanged.The values of j and k must both be between 1 and LENGTH(numList), inclusive.
Which of the following best describes the behavior of the code segment?
The code segment displays the value of 2(5^3) by initializing result to 2 and then multiplying result by 5 a total of three times.
A student wrote the following code segment, which displays true if the list myList contains any duplicate values and displays false otherwise. The code segment compares pairs of list elements, setting containsDuplicates to true if any two elements are found to be equal in value. Which of the following best describes the behavior of how pairs of elements are compared?
The code segment iterates through myList, comparing each element to all subsequent elements in the list.
A student is creating an application that allows customers to order food for delivery from a local restaurant. Which of the following is LEAST likely to be an input provided by a customer using the application?
The cost of a food item currently available for order
RunRoutr is a fitness tracking application for smartphones that creates suggested running routes so that users can run with each other. Upon downloading the application, each user creates a username, a personal profile, and a contact list of friends who also use the application. The application uses the smartphone's GPS unit to track a user's location, running speed, and distance traveled. Users can use the application to review information and statistics about their previous runs. At the beginning of a run, users indicate the distance they want to run from their current location, and the application suggests a running route. Once a user accepts a suggested route, the application shares the suggested route with other compatible users in the area so that they can run together. Users are considered compatible if they are on each other's contact lists or if they typically run at similar speeds. A basic RunRoutr account is free, but it displays advertisements that are targeted to individual users based on data collected by the application. For example, if a user's running route begins or ends near a particular store, the application may display an advertisement for that store. Users have the ability to pay a monthly fee for a premium account, which removes advertisements from the application. Adrianna uses RunRoutr to suggest a running route. All compatible users near Adrianna receive a notification that shows her running route. Which of the following data is not obtained using data collected from Adrianna's smartphone but necessary for RunRoutr to share Adrianna's running route?
The current locations of other RunRoutr users
RunRoutr is a fitness tracking application for smartphones that creates suggested running routes so that users can run with each other. Upon downloading the application, each user creates a username, a personal profile, and a contact list of friends who also use the application. The application uses the smartphone's GPS unit to track a user's location, running speed, and distance traveled. Users can use the application to review information and statistics about their previous runs. At the beginning of a run, users indicate the distance they want to run from their current location, and the application suggests a running route. Once a user accepts a suggested route, the application shares the suggested route with other compatible users in the area so that they can run together. Users are considered compatible if they are on each other's contact lists or if they typically run at similar speeds. A basic RunRoutr account is free, but it displays advertisements that are targeted to individual users based on data collected by the application. For example, if a user's running route begins or ends near a particular store, the application may display an advertisement for that store. Users have the ability to pay a monthly fee for a premium account, which removes advertisements from the application. Which of the following data must be collected from a user's smartphone in order for RunRoutr to suggest a running route?
The user's geographic position
A company that develops mobile applications wants to involve users in the software development process. Which of the following best explains the benefit in having users participate?
Users can provide feedback that can be used to incorporate a variety of perspectives into the software.