Answer the questions below using the following code example.
<body>
<h1>List of pets ideal for city-dwellers</h1>
<div>
<ul>
<li><span id="dog">Poodle</li>
<li><span id="king-cobra">Nag</li>
<li><span id="mongoose">Joe Mongoose</li>
</ul>
</div>
</body>???
?: Which of the following declarations will create a variable whose content CANNOT be changed?
( ) var lunchOrder = "tofu"
( ) let lunchOrder = "soup"
(X) const lunchOrder = "rock salt"
?: Given a method called razzle, how do you trigger its behavior?
( ) razzle ( ) razzle[] ( ) (razzle) (X) razzle()
?: In the HTML snippet above, select the JavaScript command that would select the node containing the text "Poodle."
( ) document.querySelector('.dog')
( ) document.querySelector('#king-cobra')
(X) document.getElementById('dog')
( ) document.getElementById('#dog')
?: In the HTML snippet above, select the JavaScript command which would select all the <li> nodes.
( ) document.querySelector("li")
(X) document.querySelectorAll("ul > li")
( ) document.querySelectorAll("ul")
( ) document.querySelector("span")
?: Which of the following JavaScript statements will change the text of the node with the id of "dog" to the text "Byron"?
( ) document.querySelectorAll("span[0]").textContent = "Byron";
( ) document.querySelector("#li").innerHTML = "Byron";
(X) document.querySelector("#dog").textContent = "Byron";
( ) document.getElementsByClass("span")[0].textContent = "Byron"
?: Talk about bad ideas, king cobras are not good pets. How can we remove the span with the id "king-cobra"?
( ) document.querySelector("span").delete("#king-cobra");
(X) el = document.querySelector("span#king-cobra"); y = el.parentNode; y.removeChild(el);
( ) el = document.querySelector("span#king-cobra"); y = el.parentNode(); y.removeChild(el);
( ) document.querySelector("ul").removeChild("span#king-cobra");
?: We’ve been inundated by cat owners who are angry that we have missed their favorite species of pet. What JavaScript snippet will add an li with a span inside with the text "Nancy Drew (the cat)" inside to our ul?
( ) document.getElementsByTagName("ul")[0] += "<li><span id=\"cat\">Nancy Drew (the cat)</span></li>";
( ) ul = document.getElementsByTagName("ul")[0]; ul.innerText += "<li><span id=\"cat\">Nancy Drew (the cat)</span></li>";
(X)base = document.getElementsByTagName("li")[0].parentNode; item = document.createElement("li"); s = document.createElement("span"); s.id = "cat"; s.textContent = "Nancy Drew (the cat)"; item.appendChild(s); base.appendChild(item)
( )base = document.getElementsByTagName("li")[0].parentNode; item = document.createElement("li"); s = document.createElement("span#cat"); s.textContent = "Nancy Drew (the cat)"; item.addChild(s); base.addChild(item)
?: What JavaScript command would return the name of the mongoose?
( ) document.querySelectorAll("#mongoose").text;
(X) document.querySelector("#mongoose").textContent;
( ) document.querySelector("#mongoose").text;
( ) document.querySelectorAll("#mongoose").content;
?: Which snippet correctly uses innerHTML to replace an HTML document’s body with a divcontaining an h1 with content "No Pets Allowed"?
( ) document.querySelector("#body").innerHTML = "<div><h1>No Pets Allowed</h1></div>"
( ) document.querySelector(".body").innerHTML = "<div><h1>No Pets Allowed</h1></div>"
(X) document.querySelector("body").innerHTML = "<div><h1>No Pets Allowed</h1></div>"
( ) document.querySelectorAll(".body").innerHTML = "<div><h1>No Pets Allowed</h1></div>
?: Changing rendered text in the DOM with JavaScript changes the HTML source.
( ) True (X) False
???
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent