Section 1
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The Domain Name System (DNS) is essentially
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Date created
Mar 1, 2020
Cards (87)
Section 1
(50 cards)
The Domain Name System (DNS) is essentially
A database mapping hostnames to IP addresses
Only GET requests are appropriate to be used on an API
False
Which git command forcibly deletes a branch called 'experiment'?
git branch -D experiment
Communication between two computers across a network requires which two pieces of information
Port number, IP address
Which git command lets you move between branches?
git checkout
Any DOM element may be made to respond to being clicked
True
What sort of JavaScript language constructs should be assigned to a DOM element's .onXYZ properties in order to handle events? (For example, properties such as .onclick, .ondblclick, .onmouseover, etc.)
functions
When associating a JavaScript expression to a DOM element's HTML attribute such as onclick="..." or onchange="...", what does 'this' mean?
'this' is a reference to the DOM element itself
How do I copy one node (and all of its children nodes) in the DOM (the 'target') and place it elsewhere (the 'destination')?
destination.appendChild(target.cloneNode(true));
Which features do Python dictionaries and JSON share in common?
All apply
APIs are primarily intended to be used by
Other programs
A newly created branch is automatically pushed to the remote 'origin' when you run git push
False
Which git command is used to list all branches in your repo, showing which commits belong to which branches?
git show-branch
Which command line tool is used to query the WHOIS database for information about the owner of a domain?
whois
Which of the following exemplifies the Method invocation pattern?
var result = o.f()
Your client wants to see how your project is coming along, but the webapp only works on your laptop. What type of port forwarding will enable your client to connect to your laptop from an external domain?
Remote port forwarding
What is the result of the following JavaScript expression? typeof NaN === "number"
true
Which git command discards all uncommitted changes in the working directory?
git checkout -f
Which JavaScript method attaches a node to the DOM?
.appendChild()
If you are presently on the branch 'master' and then run git checkout -b newBranch git add . git commit -m "fixed a bug", what happened to the commit known as 'master'?
Since you didn't have the 'master' branch checked out it is unaffected
Which git command will quickly show me who wrote which line of code in a file, and how long ago they wrote it?
git blame -- FILENAME
Which of the following exemplifies the Constructor invocation pattern?
var result = new f();
Which git command lists the branches in your repository?
git branch
Which command creates and checks out a new git branch?
git checkout -b
Which command line tool is used to query the Domain Name System?
nslookup
Which kind of port forwarding behaves like a Virtual Private Network (VPN) on an application-by-application basis?
Dynamic port forwarding (SOCKS Proxy)
How do I deeply clone a DOM element (and all of its children nodes) in the DOM (the 'target') and place it elsewhere (the 'destination')?
destination.appendChild(target.cloneNode(true));
Which task is the Secure Shell (SSH) primarily concerned with?
Remote web server administration
Which of the following JS operations perform implicit type conversion?
123 == '123'
Suppose you must access a single service which is behind a firewall (such as a printer on your home network). Which type of port forwarding would you use?
Local port forwarding
Suppose that I accidentally delete a function in my source code, save the file and exit my editor. I cannot use my editor's undo history to recover the missing code. If I haven't committed my mistake to git, what command will I use to recover my missing code?
git checkout -- FILENAME
Which of the following exemplifies the Function invocation pattern?
var result = f();
Which powerful git command will list the log of repository-modifying actions, enabling you to track down commits which do not belong to a named branch?
git reflog
Arrays are basically "glorified" objects in JavaScript
True
Modern web applications take advantage of APIs to maximize
Scalability
SSH replaced older protocols such as Telnet and rsh because
SSH is secure
Why is the result of 123 == '123' true?
Using the == operator converts both operands to the same type before performing the comparison
In order to use an API, what information must a developer know?
What information to put into the HTTP request, Which URLs you can use, Which HTTP request types to use
Which of the following is not a comparison operator in JS?
<==
How many properties does the following JavaScript object contain? var person = { name: ['Bob', 'Smith'], age: 32, gender: 'male', interests: ['music', 'skiing'], bio: function() { alert(this.name[0] + ' ' + this.name[1] + ' is ' + this.age + ' years old. He likes ' + this.interests[0] + ' and ' + this.interests[1] + '.'); }, greeting: function() { alert('Hi! I\'m ' + this.name[0] + '.'); } };
6
Which git command safely deletes a branch called 'experiment'?
git branch -d experiment
If you discard your uncommitted changes using the above command, git is able to recover them for you.
False
Why might a modern web app use an API?
Leverage 3rd-party services, Division of labor
What does git revert master~6 do?
Creates and commits a change which undoes the change introduced by the 6th ancestor of the master branch
There is only one authoritative DNS server in the world
False
What does a port number identify?
A service on a machine
The acronym API stands for
Application Programming Interface
Only <input> elements may respond to a mouse click
False
If HEAD refers to the currently checked-out commit, what does HEAD~4 refer to?
The 4th ancestor (great-great grandparent) of the currently checked-out commit
The following JS expression prints "Hello World" to the console. print("Hello World");
False
Section 2
(37 cards)