Unit 5 - Lists, Loops, and Traversals Test Review

Which of the following is a benefit of using a list over a variable?

• Lists can hold more than one value

• Lists convert all elements to Strings

• Lists allow duplicate values in a more manageable way then variables.

• Only lists can be used be used with user input

What would be the element at index 3 of the following list:

[1, 4, 6, 8, 10, 11]

• 8

• 6

• 10

• 11

Strings also have an index where each character is an element. What character would be at the index of 2 for a String with value "Hello!"

• l

• e

• H

• o

Usually we start indexes at 0. For this question assume that the indexes start at 1. Which element would be at index 1 of the following list:
[1, 9, 2, 3, 5, 11]

• 1

• 9

• 11

• 3

Answer explanation

Usually we do start the indexes at 0 but this question specifically says that you should assume the indexes start at 1. Despite no major programming language using this convention, the AP Test loves to do this.

What does the appendItem() function do in App Lab?

• Adds elements to the end of the list

• Adds elements into the middle of the list at a given index

• Adds elements to the beginning of a list.

• Adds elements at random indexes in the list.

What would be output as a result of the following loop?

Assume no errors are thrown when this code is run

• red red red blue red red red blue

• red blue red blue red blue

• red red blue red red blue red red blue

• blue blue red red red red red red

A list contains 10 elements. Which of the following would be a valid index for this list?

• 5

• 2.5

• 10

• "Hello"

In which of the following examples would a list be most helpful over multiple variables?

• The program includes individual variables to store the names of each student rather than a single list of students.

• A program includes multiple comments that could be combined into a single comment

• A program includes repeated programming statements that could be moved inside a loop

• A program includes repeated code that could be moved inside a function.

Which of the following could replace <INSERT CODE> to make all the elements to display in the console log?

• i < list.length

• i < 3

• i > list

• i > list.length - 1

The list wordList contains the following elements ["hello", "puppy", "kitten"]. Which of the following code would successfully make the elements inside the list be ["hello", "hello", "kitten"]?

• wordList[1]=wordList[0];

• wordList[0]=wordList[2];

• wordList[1]==wordList[0];

• wordList[3]=wordList[1];