CSI Jeopardy

Variables

100

What data type is "hello"?

(number, boolean, string, undefined)

string

200

What data type is "true"?

(string, boolean, number, object)

boolean

300

Which keyword is used to declare a variable?

(var, let, make, define)

let

400

What data type is 3.5 in JavaScript?

(integer, float, number, decimal)

number

500

What is wrong with this variable name?

let 2name = "Alex";

cannot start with a number

If/Else

100

What will this print?

let x = 10;

if (x>5) {

console.log ("Yes");

}

Yes

200

Which operator should be used to compare values?

==

300

What will this print? 

let x = 2;
if (x > 5) {
    console.log("A");
} else {
    console.log("B");
}

B

400

What is wrong with this code?

if (x = 5)

Should use ===

500

What keyword is used for another condition?

(else if, repeat, next, continue) 

else if

Loops

100

How many times does this loop run?

for (let i = 0; i < 3; i++)

3

200

What will this print?

for (let i = 0; i < 2; i++) {
    console.log(i);
}

0, 1

300

Which loop runs while a condition is true?

(for, repeat, while, loop)

while

400

What part updates the loop variable?

for (let i = 0; i < 5; i++)

i ++

500

What happens if the loop condition never becomes false?

Infinite loop

Functions

100

What keyword defines a function?

(def, function, func, create)

function

200

What does return do?

Sends value back

300

What is printed?

function add(a, b) {
    return a + b;
}
console.log(add(2, 3));

5

400

What are a and b called? 

(arguments, variables, parameters, inputs)

parameters

500

What are values passed into a function called?

(parameters, arguments, returns, variables)

arguments

Arrays/Strings

100

What is the first index in an array?

0

200

What prints?

let nums = [1, 2, 3];
console.log(nums[1]);

2

300

What does this do?

"text".toUpperCase()

makes uppercase

400

What prints?

let word = "hello";
console.log(word[0]);

h

500

What does this return?

"hello".substring(1,4)

ell