Practice Quiz on Variables and Arrays

Create a variable called "total" and assign the number 105 to it. (For all remaining questions use the const declaration keyword.)

const total = 105;

Create a variable called "score" and assign the number 25300 to it. No commas.

const score = 25300;

Create a variable called "numOfApples" and assign the number 10 to it.

const numOfApples = 10;

Create a variable called "population" and assign the number 1000000 to it.

const population = 1000000;

Create a variable called "firstName" and assign it a string "Wanda".

const firstName = "Wanda";

Create a variable called "lastName" and assign it a string "Washington".

const lastName = "Washington";

Create a variable called doTheyLoveMe and assign it a false boolean value.

const doTheyLoveMe = false;

Create a variable called amIGoingToDoWellInThisClass and assign it a true boolean value.

const amIGoingToDoWellInThisClass = true;

What is the value of sum variable? const sum = "14" + "15"; (don't include semicolon)

What is the value of sum variable? const sum = 14 + 15; (don't include semicolon)

Create a variable "score" and assign number 110. Then, in a second line of code increment the value by 10.

const score = 110;
score += 10;

Create a variable "score" and assign number 210. Then, in a second line of code decrement the value by 10.

const score = 210;
score -= 10;

First, assign the name "Ella Rodriguez" to two variables, "firstName" and "lastName". Then, in a third line of code, create another variable called "fullName" that assigns the first two variables concatenated so that fullName will contain the string "Ella Rodriguez" with a space between the names.

const firstName = "Ella";
const lastName  = "Rodriguez";
const fullName = firstName + " " + lastName;

First, assign the name "Calvin Washington" to two variables, "firstName" and "lastName". Then, in a third line of code, create another variable called "fullName" that assigns the first two variables concatenated so that fullName will contain the string "Calvin Washington" with a space between the names.

const firstName = "Calvin";
const lastName  = "Washington";
const fullName = firstName + " " + lastName;

Create an array called "pies" and store three strings: Apple, Pumpkin and Cherry.

const pies = ["Apple", "Pumpkin", "Cherry"];

Create an array called "myPeeps" and store four strings: Misty, Philip, Anita, and Jackson

const myPeeps = ["Misty", "Philip", "Anita", "Jackson"];

Create an array variable called "data" containing three different datatypes: the number 5, the boolean false, and the string "Hooray".

const data = [5, false, "Hooray"];

Create an array variable called "data" containing three different datatypes: the number 100, the string "birthday", and the boolean true.

const data = [100, "birthday", true];

Recall the value Jim from the following array. const names = ["Jay", "Jim", "Joe"];

names[1];

Recall the value 3 from the following array. const numbers = [1, 2, 3];

numbers[2];

Recall the value 2 from the following array. const numbers = [2, 1, 3];

numbers[0];

Recall the value 1 from the following array. const numbers = [3, 2, 1];

numbers[2];

Recall the value 3 from the following array. const numbers = [3, 2, 1];

numbers[0];

Recall the value "Jake" from the following 2D array: const names = [["Joe", "Jim"], ["Jake", "James"], ["Jessie", "Jerry"]];

names[1][0];

Recall the value "Alvin" from the following 2D array: const names = [["Vivan", "Sonia"], ["Audrey", "Jayden"], ["Hazel", "Alvin"]];

names[2][1];

Recall the value "Foster" from the following 2D array: const names = [["Bertha", "Parker", "Lewis", "Felecia"], ["Stacy", "Howard", "Kim", "Foster"]];

names[1][3];

Recall the value "Marsha" from the following 2D array: const names = [["Marion", "Garrett", "Veronica", "Liam"], ["Stacy", "Price", "Marsha", "Larson"]];

names[1][2];

Create a 2D array variable called "numbers", then store the values 1–9, but in three sets of arrays. (1-3 will be in first array, 4-6 in the second array, 7-9 in the third array.)

const numbers = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];

Create a 2D array called "presidents" with the last names of the four presidents on Mt. Rushmore; two per array.

const presidents = [["Washington", "Jefferson"], ["Roosevelt", "Lincoln"]];

Recall president Lincoln from the following array: const presidents = [["Washington", "Jefferson"], ["Roosevelt", "Lincoln"]];

presidents[1][1];

Have you completed all of the questions in this practice quiz? If so, click "check answer" and a code will be given that you can use to earn credit for this on bCourses.

let iLoveCoding = true;