Unit 3 Exam Review

Symbols

100

Addition

*

200

Subtraction

-

300

Multiplication

*

400

Division

/

500

Modulus

%

Program Outputs

100

What is the output of the following program:

let firstName = "John";

firstName = "Jack";

console.log(firstName);

Jack

200

What is the output of the following program:

    let firstName = “Selena”;

    let lastName = “Gomez”;

    console.log(firstName + lastName);

SelenaGomez

300

What is the output of the following program:

let firstName = "Taylor";

console.log(firstname);

Syntax error! Variable names do not match.

400

What is the output of the following program:

let firstLine = "Hello";

let secondLine = "World";

console.log(firstLine);

console.log();

console.log(secondLine);

Hello

World

500

What is the output of the following program:

console.log("20*30")

20*30

JavaScript Conventions

100

1. Which of the following is a proper variable name (i.e. following JavaScript conventions)?
   a. date_of_birth
   b. dateOfBirth
   c. Date of Birth
   d. DateOfBirth

B

200

1. Which of the following function names follows JavaScript conventions?
   a. GetFirstName()
   b. Get_First_Name()
   c. getFirstName()
   d. getfirstname()

C

300

const PI = 3.14

Where in your program would you place the above line of code to declare a constant?

Above the main function, outside of any functions

400

What are all of the valid Randomizer functions?

Randomizer.nextInt();

Randomizer.nextBoolean();

Randomizer.nextFloat();

Randomizer.nextColor(); [it's okay if you don't know this one!]

500

What is the convention for capitalization called in JavaScript?

Camel Case

Math Calculations

100

Given the following:

    let totalCost = 90;

    let numBagsOfChips = 30;

How could you print the cost per bag?

console.log(totalCost/ numBagsOfChips);

200

What does modulus calculate?

The remainder of a division problem

300

What is 15%4?

3

400

let numChips = 40;

let numSodas = 70 + numChips;

numChips = 30;

let total = numChips + numSodas;

console.log(total)

140

500

What is the output of the following program:

let stepOne = 30+40;

let stepTwo = stepOne*2;

let stepThree = stepOne + 5;

console.log(stepThree);

75

Miscellaneous

100

1. You want to ask the user how many bags of chips they would like to buy. How would you read in a number from the user?
   a. let bagsOfChips = console.log(“How many bags of chips would you like? “);
   b. let bagsOfChips = readLine(“How many bags of chips would you like? “);
   c. let bagsOfChips = readInt(“How many bags of chips would you like? “);
   d. let bagsOfChips = nextInt(“How many bags of chips would you like? “);

C

200

Write a line of code to return a random number between 10 and 20.

Randomizer.nextInt(10, 20)

300

What are the roles in pair-programming and what does each role do?

Driver: to control the mouse and keyboard, and type out the code.

Navigator: to read the problem and narrate the plan of action. Also, to review the Driver's code in order to catch any bugs.

400

In Hidden Figures, what did she use in the office that the rest of the employees did not want to touch?

Coffee Pot

500

In Hidden Figures, what was the name of the character who went to court to take classes at a segregated high school?

Mary