Final Graded Quiz: The Full Stack

True or False: JavaScript can be used in both front-end and back-end.

• True

• False

Your application is divided into two distinct parts: the code and the database. You host the application code on a virtual server and the database on two different servers. You’re browsing the application using a mobile device. How many tiers are there?

• 2 tiers

• 3 tiers

• 4 tiers

• No tiers. It’s a 4-layer architecture.

For a given <div> tag and <p> tag, which of the following has the correct syntax for a general sibling combinator?

• div + p

• div p

• div > p

• div ~ p

Calculate the specificity of the following selector:

ul#alpha #li.visited

• 211

• 13

• 103

• 112

Which form attribute is used to specify the address to which the form data should be submitted to?

• action

• required

• src

• method

What does the && operator represent in JavaScript?

• The logical NOT operator

• It is not a valid operator

• The logical AND operator

• The logical OR operator

Which of the following built-in field types of model stores has purely numeric data? Select all that apply.

• URLField

• FloatField

• CharField

• IntegerField

Someone has created an online web application and people must purchase a monthly or yearly subscription to use that service. What kind of cloud computing model is this?

• SaaS

• IaaS

• Self Hosted

• DBaaS

• PaaS

Which of the following are the benefits of public cloud computing? Select all that apply.

• You only pay for what you use.

• It’s always affordable.

• You can deploy computing units any time.

• Your application never goes down or offline.

• You can scale easily.

True or false: Scaling vertically is easier than scaling horizontally

• True

• False

Which of the following tools could be part of the front end portion of the full stack? Select the all that apply.

• NoSQL

• HTML

• Python

• Javascript

Which part of an application would accept user data and do basic validation?

• Front end

• API

• Back end

• Database

Semantic HTML, in addition to adding meaning to the content, also creates the ability for what other utilities to understand the content of the page? Select all that apply.

• Accessibility software

• Search engines

• APIs

• Web servers

Client side validation can be done a number of different ways before form data is sent to the server. Which of the following is a method of client-side validation?

• Using the required attribute.

• Check the data against a database.

• Check the data against business requirements.

• Use appropriate input elements.

Which of the following is a value in CSS that is relative to the font size of the root element of the page?

• px

• em

• rem

• pc

On an existing HTML page, all <h2> tags on the page need to be updated with content retrieved from a database. What Javascript code would be used to select all <h2> tags?

• document.querySelector(‘h2’)

• page.select(‘h2’)

• document.get(‘h2)

• document.querySelectorAll(‘h2’)

When creating a new element in Javascript using the createElement() function, what needs to happen once the element is created to get it to show up on the page?

• It must be added to the DOM structure.

• The import statement in Javascript must be used.

• It must be moved from the bottom of the page.

• It automatically shows up.

Between two models, the primary key in model 1 has multiple corresponding objects in model 2. This is an example of what kind of relationship?

• One-to-none

• One-to-one

• One-to-many

• Many-to-many

Sometimes, models and the ORM are not enough and pure SQL needs to be used to run a query. What is the correct function to use to run a SQL query in Django?

• raw()

• select()

• query()

• sql()

This Javascript concept represents the eventual completion of an operation that could be asynchronous.

• React

• promise

• fetch

• event listener

What data format is typically used to read and process data in Javascript when a response is returned from an API?

• JSON

• SQL

• ModelForm

• QuerySet

When authenticated calls need to be made, what is used to pass authentication information?

• Bearer token

• Payload

• JSON

• Django model

In virtualization, one downside of _____ is that they can sit idle and go to waste.

• containers

• dedicated resources

• hypervisors

• shared resources

A benefit of this type of hosting is that all allocation of resources is managed by the provider.

• Dedicated server

• Serverless

• Containerization

• Virtualization

What are some of the benefits of using a managed database solution through a cloud provider? Select all that apply.

• The database is housed on premises.

• Scaling must be carefully managed.

• They can scale automatically

• The provider handles tuning the database

Which of the following IP ranges are private? Select all that apply.

• 10.0.0.0 - 10.255.255.255

• 148.198.0.0 - 148.198.255.255

• 172.16.0.0 - 172.31.255.255

• 69.0.0.0 - 69.255.255.255

What type of files are CDNs used for that will significantly increase performance?

• dynamic files

• static files

• databases

• JSON files

One method of horizontal scaling of databases is to split the database across multiple servers. This is called _____.

• sharding

• round-robin

• caching

• master-slave replication

Which CSS property should be set on a container to change to a CSS grid layout of rows and columns?

• layout: flexbox;

• display: grid;

• flex: grid;

• layout: grid;

What is the first argument passed to the addEventListener function?

• The target of the event.

• A string describing the type of event (such as, "click").

• A function that will handle the event.

• The error to display if the event fails.