6.1.1 JavaScript Flashcard

Front

Why do programmers use variables?

Back

To store values to easily reuse later and make code easier to read and understand

Front

What line of code would print the speed in km/hr if the distance is given in km and the time is given in minutes? (Speed = distance/time) Options: println(distance/(time/60));, println(distance/time);, println(distance*(time*60));, println(distance*time);

Back

println(distance/(time/60));

Front

What is printed to the screen if the user enters ‘5’ when the following program is run?
var userNum = readInt("Enter your favorite number: ");
var calculatedNum = (userNum * userNum) + userNum;
println(calculatedNum);

Back

30

Front

A store has 20 apples in its inventory. How can you store this information in a JavaScript variable? Options: var numApples -- 20; 20 = numApples; var numApples = 20; var num apples = 20;

Back

var numApples = 20;

Front

You want to read input from the user to know how many apples they would like to buy. Which statement should you use to read in a number from the user? Options: var applesToBuy = readLine("How many apples would you like? ");, var applesToBuy = println("How many apples would you like? ");, var applesToBuy = readInt("How many apples would you like? ");, var applesToBuy = nextInt("How many apples would you like? ");

Back

var applesToBuy = readInt("How many apples would you like? ");

Front

You are splitting up all of your apples equally between 3 people. Which statement below will calculate how many apples will be left over? Options: var leftOver = numApples / 3;, var leftOver = numApples % 3;, var leftOver = 3 / numApples;, var leftOver = 3 % numApples;

Back

var leftOver = numApples % 3;

Front

In order to write the function rollDice() for a game, I need to generate and store a random integer between 1 and 6. Which statement below will accomplish this task? Options: var diceRoll = Randomizer.nextInt(1,6);, var diceRoll = Randomizer.nextInt(0,7);, var diceRoll = Randomizer.nextNum(1,6);, var diceRoll = Randomizer(1,6);

Back

var diceRoll = Randomizer.nextInt(1,6);

Front

What is the output of the following program: (Assume the user enters ‘Florence’ then ‘Fernandez.’) var firstName = readLine("What is your first name? "); var lastName = readLine("What is your last name? "); var wholeName = firstName + lastName; println (wholeName);

Back

Florence Fernandez

Front

Select the code below that correctly prints, “6 / 3 is equal to 2”, if the user inputs 6 and then 3. Options: var integerOne = readInt("Enter first number: "); var integerTwo = readInt("Enter second number: "); var solution = integerOne / integerTwo; println(integerOne + " / " + integerTwo + " is equal to " + solution);, var integerOne = readLine("Enter first number: "); var integerTwo = readLine("Enter second number: "); var solution = integerOne / integerTwo; println(integerOne + " / " + integerTwo + " is equal to " + solution);, var integerOne = readInt("Enter first number: "); var integerTwo = readInt("Enter second number: "); var solution = integerOne / integerTwo; println(integerOne / integerTwo is equal to solution);, var integerOne = readInt("Enter first number: "); var integerTwo = readInt("Enter second number: "); var solution = integerOne / integerTwo; println(integerOne + " / " + integerTwo + " is equal to " solution);

Back

var integerOne = readInt("Enter first number: "); var integerTwo = readInt("Enter second number: "); var solution = integerOne / integerTwo; println(integerOne + " / " + integerTwo + " is equal to " + solution);

Front

What is printed to the screen when the following program is run?
var num = 13 % 3;
println(num);

Back

1