JS Trivia

Subject 1 : JS Interactions

Question 1: What does alert do?

Results in a pop up which the user responds to by clicking "OK" Sets of an alarm that the user needs to turn off Submit

Question 2 : Do users enter an answer to a prompt manually or choose from a list of options?

Manual Input Multiple Choice Submit

Question 3 : What are the buttons that a user can press to respond to the confirm function?

yes or no OK and Cancel Confirm and Cancel Submit

Subject 2 : JS Math Operations

Question 1 : What are the 6 basic operations supported by JavaScript?

Addition, Subtraction, Division, Square root, Logarithm, Multiplication Addition, Subtraction, Division, Remainder, Exponentiation, Multiplication Submit

Question 2 : What does the % operation do?

Finds the remainder after division Converts the division result into a percentage Submit

Question 3 : What does the ** operation do?

Multiplies a number by another number twice Multiplies a number by itself and another number Raises a number to a power Multiplies a number by a fraction Submit

Example of JS Math Operations

JS Calculator

Number 1: Number 2:

Pick an operator:

+ add - subtract * multiply / divide ** exponentiate % divide and find remainder Calculate

The answer is...

JS Counter up to 10

View the console tab to see the results of ++, that creates a counter up to 10

JS Counter down from 10

View the console tab to see the results of --, that creates a count down from 10

Math using the modify-and-assign operator +=

Starting number Number to add Calculate

The answer is...

Subject 3 : Arrays

Question 1: What are the two syntaxes for creating an empty array?

let arr = new Array();
let arr = [];
let arr = ();
Submit

Question 2: What is one operation that can be performed on an array?

lock shift push pop unshift pull shove Submit

Question 3: What is the length property of an array?

The greatest numeric index plus one The number of items in the array Submit