Quiz 2

Question 1

What is a promise?

Answer 1

An object that will be completed in the future

Question 2

In a JavaScript class, how do you declare a getter function for a field called “stuff” so that the function can be called on an instance, obj, by writing “obj.stuff”?

Answer 2

get stuff

Question 3

Suppose you call a function that requires a callback with two parameters, err and data. When the callback completes, which of the following possibilities should NOT occur?

Answer 3

Err and data are both populated – indicating that the function encountered an error but still was able to return some of the data

Question 4

What is the name of the tool that creates HTML pages from JavaScript comments?

Answer 4

Jsdoc

Question 5

In a JavaScript class, where should the “exports” object be declared?

Answer 5

After the class body

Question 6

What is the node command to install the dependencies listed in the package.json file?

Answer 6

Npm install

Question 7

The keyword await is used to?

Answer 7

Wait for a Promise to resolve

Question 8

When a Promise resolves, it is in one of two possible states. Those two states are called?

Answer 8

Fulfilled / rejected

Question 9

What will happen if you call a function that returns a Promise and you forget to use await?

Answer 9

The program will hang indefinitely

Question 10

In a JavaScript class, how do you declare a field called “stuff” so that it is private?

Answer 10

stuff