Basic Data Structures - Intro to CS

What is the output of the following program?

• [1, 3, 4, 5]

  2

• [1, 2, 3]

  [4, 5]

• [1, 2, 4, 5]

  3

• [3, 4, 5]

  [4, 5]

In the following array:

var groceries = ["milk", "eggs", "bread", "cookies"];

Which of the following statements will change "bread" to "coffee"?

• groceries.push("coffee");

• groceries[2] = "coffee";

• groceries["bread"] = "coffee";

• groceries[3] = "coffee";

Suppose we have a list schoolList shown below:

var schoolList = ["Richland", "Hanford", "Pasco"];

We want to write a function addSchool that will take a school list and an item as a parameter and add the item on to the end of the school list.

Which of the following is the correct implementation of addSchool?

• 
• 
• 
• 

What does the following function bombers do?

• Returns a copy of the list list, and does not modify the contents of the list.

• Returns a copy of the list list, and leaves list empty.

• Returns a new list containing the elements of the list list in reverse order, and leaves list empty.

• Returns a new list contatining the elements of the list list in reverse order, and does not modify the contents of the list.

What is the output of the following program?

• -1

• 1

• 0

• 2

What elements can be stored in data structures?

• Any kind of objects (anything you can store in a variable)

• Strings of text and numerical values

• Strings of text, numerical values, and booleans

• numerical values

How do we add 6 on the end of this array?

var nums = [1, 2, 3, 4, 5];

nums​ (a)  

• .push(6);
• .push(5);
• .pop(6);
• .pop(5);
• nums[0] = 6;
• [3] = 6;

How do we remove the last item from the end of this array and store it in a variable called value?

var number = [1, 1, 2, 3, 5];

(a)  

How can you find the length of an array named arr?

(a)  

The ​ ​ (a)   method lets us find the index of a particular element in an array.

• indexOf
• find
• findElement
• index
• pop