What is the most common file type of media supported for audio playback on the Android?

What is the most common file type of media supported for audio playback on the Android?

a. midi
b. mp3
c. ogg
d. wav


Answer: b. mp3

What is the first GridView control in a project named by default?

What is the first GridView control in a project named by default? 

a. control1
b. defaultGallery
c. gridView1
d. theGallery


Answer: c. gridView1

What is the TextView property for backgrounds?

What is the TextView property for backgrounds?

a. graphic
b. background
c. picture
d. image


Answer: b. background

What invokes a scheduled Timer?

What invokes a scheduled Timer? 

a. AbstractTask
b. ScheduledTask
c. Task
d. TimerTask


Answer: d. TimerTask

What does the splash screen provide time for Android to do?

What does the splash screen provide time for Android to do? 

a. bootstrap the phone driver
b. download updates
c. initialize resources for your app
d. stream data from Google


Answer: c. initialize resources for your app

What category of the Palette does the control GridView sit in?

What category of the Palette does the control GridView sit in? 

a. Images category
b. Composite category
c. Media category
d. Viewing category


Answer: b. Composite category

What can be described as the series of actions from the beginning of an Activity to its end?

What can be described as the series of actions from the beginning of an Activity to its end?

a. life cycle
b. flow chart
c. run time
d. execution period


Answer: a. life cycle

Using controls such as the GridView and Spinner, what binds specific types of data and displays that data in a particular layout?

Using controls such as the GridView and Spinner, what binds specific types of data and displays that data in a particular layout?

a. adapter
b. context
c. editor
d. view


Answer: a. adapter

On an Android, what are 1000 milliseconds equivalent to in seconds?

On an Android, what are 1000 milliseconds equivalent to in seconds?

a. 0.1 seconds
b. 1 second
c. 10 seconds
d. 100 seconds


Answer: b. 1 second

Each of the following is a common state for the MediaPlayer class except for which one?

Each of the following is a common state for the MediaPlayer class except for which one?

a. continue()
b. pause()
c. start()
d. stop()


Answer: a. continue()

What is printed to the console after the code that follows is executed?

What is printed to the console after the code that follows is executed?

int[][] types = new int[4][];
for (int i = 0; i < types.length; i++)
{
types[i] = new int[i+1];
}
System.out.println(types[1].length);

a. "3"
b. code doesn't compile
c. "1"
d. "4"
e. "2"


Answer: e. "2"

What happens when the code that follows is executed?

What happens when the code that follows is executed?

int[] nums = new int[4];
for (int i = 0; i <= nums.length; i++)
{
nums[i] = i;
}
System.out.println(nums[2]);

a. It prints "3" to the console.
b. It prints "2" to the console.
c. It prints "1" to the console.
d. It throws an ArrayIndexOutOfBoundsException


Answer: d. It throws an ArrayIndexOutOfBoundsException

To use the binarySearch method of the Arrays class on an array of ints, you must first

To use the binarySearch method of the Arrays class on an array of ints, you must first

a. implement the Comparable interface
b. sort the array
c. override the equals method
d. create an Arrays object


Answer: b. sort the array

The length of the array that follows is int[] grades = new int[4];

The length of the array that follows is
int[] grades = new int[4];

a. 0
b. 3
c. 5
d. 4


Answer: d. 4

The array that follows is an array of double[] grades = new double[3];

The array that follows is an array of
double[] grades = new double[3];

a. objects
b. arrays
c. grades
d. doubles


Answer: d. doubles

How many rows are in the array that follows? Rental[][] transactions = new Rental[7][3];

How many rows are in the array that follows?
Rental[][] transactions = new Rental[7][3];

a. 7
b. 3
c. 2
d. 6


Answer: a. 7

What is the length of the bestTimes array?

double[] times = {3.56, 3.9, 2.6, 4.5, 2.4, 5.2};
double[] bestTimes = new double[4];
Arrays.sort(times);
bestTimes = Arrays.copyOfRange(times, 1, 4);

What is the length of the bestTimes array?

a. 4
b. 3
c. 6
d. 5


Answer: a. 4

An enhanced for loop can only be used

An enhanced for loop can only be used

a. to work with one-dimensional arrays
b. to work with all the elements of an array
c. to work with jagged arrays
d. to work with arrays that contain integers


Answer: b. to work with all the elements of an array

Which of the following is not a reason to create a package?

Which of the following is not a reason to create a package?

a. To group related classes
b. To make finding classes easier
c. To make it easy to reuse classes
d. To prevent other developers from using the class


Answer: d. To prevent other developers from using the class

Which of the following is a valid Javadoc comment?

Which of the following is a valid Javadoc comment?

a. // Calculates the balance due //
b. / Calculates the balance due */
c. /* Calculates the balance due /
d. / Calculates the balance due /


Answer: c. /* Calculates the balance due /