CSA Unit 7 Test

What is the proper way to get the number of items in an ArrayList called list?

• list.length

• list.size

• list.length()

• list.size()

What will the following code print?

• Hello

• World

• list[0]

• There will be a compiler error

• None of the above

What is wrong with the following code?

• It will throw an IndexOutOfBoundsException.

• You cannot use int as the type in an ArrayList.

• list is a reserved word, so you can’t call the variable that.

• You need to define the new ArrayList on a new line of code.

• Nothing. The above code is correct.

What will the following code print?

• 0

• 5

• 6

• 9

What will the following code print?

• 3

• coding

• in

• Java

Consider the following statement:

• I

• II

• III

• None

What would the proper initialization and declaration be for an ArrayList myTemps meant to store precise temperature measurements?

• ArrayList<double> myTemps = new ArrayList<double>();

• ArrayList<Double> myTemps = new ArrayList<Double>();

• ArrayList<Integer> myTemps = new ArrayList<Integer>();

• ArrayList<double> myTemps = ArrayList<double>();

• ArrayList<Double> myTemps = ArrayList<Double>();

Consider the following code segment:

Which of the following represents the value of nums after the code segment has been executed?

• [20, 40, 90, 50]

• [10, 20, 30, 40, 50]

• [20, 30, 50, 90]

• [20, 30, 80, 50]

• [20, 30, 90, 50]

Consider the following code segment:
Which of the following represents the value of scales after the code has been executed?

• [SO, RE, FA, DO]

• [SO, RE, MI, FA, DO]

• [SO, RE, MI, DO]

• [FA, RE, MI, DO]

• [FA, SO, RE, MI, DO]

Consider the following code segment:
What is printed when the code segment is executed?

• []

• ["Two", "Four"]

• ["Two", "Four", "Six"]

• ["Four", "Five", "Six"]

• ["Six"]