Unit 7 ArrayLists

Which is the correct way to declare an ArrayList of Strings in Java?

• ArrayList<String>
• ArrayList(String)
• ArrayList[String]
• ArrayList{String}

Which is correct syntax to access an element of an ArrayList in Java?

• list.get(index)
• list[index]
• list.getElement(index)
• list.index

How do you add an element with the value "Pikachu" to the back of an ArrayList called "pokemon" in Java?

• pokemon.add("Pikachu");

• pokemon.append("Pikachu");

• pokemon.push_back("Pikachu");

• pokemon[last_index + 1] = "Pikachu";

How do you get the number of elements in an ArrayList called "list" in Java?

• list.size();
• list.count();
• list.length();
• list.getSize();

If an ArrayList<String> list has been initialized with 5 strings, the statement

list.add(6, "cat");

will throw an IndexOutOfBoundsException.

• TRUE

• FALSE

You can add an item in a(n) ____ and the size expands automatically to accommodate the new item.

• Array

• ArrayList

• ResizableArray

• array

Consider the following code segment:
What is printed as a result of executing the code segment?

• [P, Q, R, s, T]
• [P, Q, s, T, u]
• [P, Q, T, s, u]
• [P, T, Q, s, u]

Consider the following method from the picture below. What is printed as a result of executing the code segment?

• [a, b, c, d, e, f]

• [a, c, e, d, f]

• [c, b, e, d, f]

• [c, b, e, f]

Which index is the last element in an ArrayList called nums at?

• nums.length

• nums.length - 1

• nums.length()

• nums.size()

• nums.size() - 1

Which of the following is a reason to use an ArrayList instead of an array?

• An ArrayList can grow or shrink as needed, while an array is always the same size.

• You can use a for-each loop on an ArrayList, but not in an array.

• You can store objects in an ArrayList, but not in an array.