Question 1

Before running an app in the Android emulator, you'll need to create a(n) ________, which defines the characteristics of the device on which you want to test, including the hardware, system image, screen size, data storage and more.
A) Android Virtual Device (AVD)
B) Cloud Test Lab.
C) Android Device Emulator (ADE)
D) None of the above.

Accepted Answer

An Android Virtual Device (AVD) is required before running an app in the Android emulator. An AVD defines the characteristics of the device on which you want to test, including the hardware, system image, screen size, data storage and more. The other options, Cloud Test Lab and Android Device Emulator, are not required for creating an AVD.

Question 2

To create the best solutions, you should follow a detailed analysis process for determining your project's ________ (i.e., defining what the system is supposed to do) and developing a design that satisfies them (i.e., deciding how the system should do it).
A) prerequisites.
B) preconditions.
C) options.
D) requirements.

Accepted Answer

Requirements are the detailed description of what the system is supposed to do and serve as a basis for designing the solution. Preconditions and prerequisites are related but refer to any necessary conditions or actions that must be met before the system can function properly. Options refer to possible solutions, but they need requirements in order to be evaluated as feasible options. Therefore, the best choice is D because it directly relates to the process of defining what the system is supposed to do, which is the first step towards developing a solution.

Question 3

Classes ________ (i.e., wrap) attributes and methods into objects—an object’s attributes and methods are intimately related. 
A) encumber.
B) enclose.
C) encapsulate.
D) envelop.

Accepted Answer

The term "encapsulation" is commonly used in object-oriented programming to describe the practice of wrapping attributes and methods into objects. This makes it easier to manage and modify code, as well as preventing outside interference with the internal workings of the object. The other three options, "encumber," "enclose," and "envelop," do not accurately convey this concept.

Question 4

You must build an object of a class before a program can perform the tasks that the class's methods define. The process of doing this is called ________.
A) creation.
B) allocation.
C) building.
D) instantiation.

Accepted Answer

The process of building an object of a class is called instantiation. This involves creating an instance of the class that has been defined, and allocating memory for it to be used by the program. Therefore, choice D, instantiation, is the correct answer.

Question 5

A new class of objects can be created quickly and conveniently by ________-the new class absorbs the characteristics of an existing one, possibly customizing them and adding unique characteristics of its own.
A) customization.
B) inheritance.
C) copying.
D) None of the above.

Accepted Answer

The process described in the statement refers to inheritance, where a new class is created by inheriting properties and methods from an existing class and can also add its own unique characteristics. Customization refers to modifying existing objects, and copying creates a new identical object.

Question 6

To simulate a long press gesture on the Android emulator:
A) double click the mouse.
B) click and hold the mouse.
C) click the mouse once.
D) click, hold and drag the mouse.

Accepted Answer

To simulate a long press gesture on the Android emulator, we need to click and hold the mouse. This will help us test the long press functionality of our app on the emulator.

Question 7

Which of the following statements is false?
A) For your convenience, Google provides many preconfigured devices that you can use to quickly create AVDs.
B) You perform the swipe gesture on an AVD by placing the mouse over the AVD's "screen" and dragging up with the mouse.
C) One problem with developing Android apps is that you'll need to purchase a broad range of devices on which to test your apps.
D) All of the above are true.

Accepted Answer

This statement is false as there are various tools available such as emulators, simulators, and testing frameworks that allow developers to test their apps on a wide range of virtual devices without the need to purchase physical devices. Therefore, it is not necessary to purchase a broad range of devices to test Android apps. Statements A and B are true.

Question 8

A class's attributes are specified by the class's ________.
A) instance methods.
B) instance variables.
C) packages.
D) None of the above.

Accepted Answer

Instance variables are used to define the attributes of a class. Instance methods are used to define the behavior or actions of a class. Packages are used for organizing related classes and modules. None of the above is also not correct, as instance variables are the correct answer.

Question 9

Objects, or more precisely the ________ objects come from, are essentially re-usable software components. 
A) methods.
B) packages.
C) APIs.
D) classes.

Accepted Answer

Objects are instances of classes, which are essentially re-usable software components that encapsulate data and methods. Methods are the behavior of a class, packages are a way to organize related classes and APIs are interfaces through which classes can interact with each other.

Question 10

Which of the following statements is false?
A) The Android emulator is particularly useful if you do not have access to Android devices for testing.
B) Although you can simulate orientation changes (to portrait or landscape mode), simulating particular accelerometer readings (the accelerometer allows the device to respond to up/down, left/right and forward/backward acceleration) requires features that are not built into the emulator.
C) The Android emulator enables you to simulate the full range of Android gestures.
D) You should certainly test your apps on a variety of Android devices before uploading them to Google Play.

Accepted Answer

The Android emulator does not enable you to simulate the full range of Android gestures with high fidelity. While it can simulate basic touch interactions, complex gestures such as pinch-to-zoom or multi-finger swipes may not be accurately represented in the emulator environment.

Question 11

The ________ , included in the Android SDK, allows you to run Android apps in a simulated environment within Windows, Mac OS X or Linux, without us-ing an actual Android device. 
A) Android simulator.
B) Android emulator.
C) Android device.
D) None of the above.

Accepted Answer

The Android emulator, included in the Android SDK, is the correct choice as it simulates an Android device within a computer environment without needing an actual device. The other options are not applicable as the Android device is an actual physical device and the Android simulator is not a component of the Android SDK.

Quiz 1: Introduction to Android

Before running an app in the Android emulator, you'll need to create a(n) ________, which defines the characteristics of the device on which you want to test, including the hardware, system image, screen size, data storage and more.

To create the best solutions, you should follow a detailed analysis process for determining your project's ________ (i.e., defining what the system is supposed to do) and developing a design that satisfies them (i.e., deciding how the system should do it) .

Classes ________ (i.e., wrap) attributes and methods into objects—an object’s attributes and methods are intimately related.

You must build an object of a class before a program can perform the tasks that the class's methods define. The process of doing this is called ________.

A new class of objects can be created quickly and conveniently by ________-the new class absorbs the characteristics of an existing one, possibly customizing them and adding unique characteristics of its own.

To simulate a long press gesture on the Android emulator:

Which of the following statements is false?

A class's attributes are specified by the class's ________.

Objects, or more precisely the ________ objects come from, are essentially re-usable software components.

Which of the following statements is false?

The ________ , included in the Android SDK, allows you to run Android apps in a simulated environment within Windows, Mac OS X or Linux, without us-ing an actual Android device.