The _________ event does not necessarily have to be attached to a form element.

The change event in JavaScript doesn't necessarily have to be attached to a form element. It can also be used with other HTML elements like , , or to detect changes in their values, making it versatile for various user interactions.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3752/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3751">Which statement is true regarding function scope in JavaScript?</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3751"> <rect x="0" y="0" width="71.428571428571%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3751)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>Functions can access variables from outer scopes.</li> <li>Variables declared inside functions have global scope.</li> <li>Variables declared inside functions have function scope.</li> <li>Variables declared inside functions are accessible only within that function's block.</li> </ul> <div class="answer" data-value="3">In JavaScript, variables declared inside functions have function scope, meaning they are only accessible within that function. This is important for encapsulation and avoiding variable conflicts. Variables declared outside of functions have global scope, and functions can access variables from outer scopes, but the reverse is not true.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3751/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3750">Which design pattern can be used to create a family of related or dependent objects without specifying their concrete classes?</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3750"> <rect x="0" y="0" width="77.777777777778%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3750)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>Factory Method Pattern</li> <li>Abstract Factory Pattern</li> <li>Singleton Pattern</li> <li>Prototype Pattern</li> </ul> <div class="answer" data-value="2">The Abstract Factory Pattern allows you to create families of related or dependent objects without specifying their concrete classes. It provides an interface for creating objects in various categories while ensuring their compatibility within the family.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3750/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3749">What is the time complexity of the unshift() method in JavaScript arrays?</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3749"> <rect x="0" y="0" width="57.142857142857%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3749)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>O(n)</li> <li>O(1)</li> <li>O(log n)</li> <li>O(n log n)</li> </ul> <div class="answer" data-value="2">The unshift() method in JavaScript arrays has a time complexity of O(n), where "n" represents the number of elements in the array. This is because it needs to shift all existing elements to make room for the new element at the beginning. The higher the number of elements, the longer it takes.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3749/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3772">You are debugging a web page and find that an element isn't being selected as expected with document.querySelector('.example'). What could be a possible reason if the class name is correct?</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3772"> <rect x="0" y="0" width="50%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3772)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>Element not present in the DOM</li> <li>Element is inside an iframe</li> <li>JavaScript not loaded before the query</li> <li>Class name contains special characters or spaces</li> </ul> <div class="answer" data-value="1">If an element with the correct class name isn't being selected with document.querySelector('.example'), a possible reason could be that the element is not present in the DOM at the time of the query. Ensure that the element you are trying to select exists and is rendered when your JavaScript runs. The other options are less likely causes.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3772/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3769">How to declare a constant array in JavaScript?</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3769"> <rect x="0" y="0" width="30%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3769)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>const arr = [];</li> <li>const arr = new Array();</li> <li>const arr = {}</li> <li>const arr = [1, 2, 3];</li> </ul> <div class="answer" data-value="1">To declare a constant array in JavaScript, you can use the const keyword followed by square brackets, like const arr = [];. The const keyword ensures that the variable arr cannot be reassigned, making it a constant array.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3769/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3768">Imagine you are implementing a feature to upload a file to the server. Which HTTP method would be most appropriate to use with the Fetch API for this purpose?</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3768"> <rect x="0" y="0" width="85.714285714286%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3768)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>GET</li> <li>POST</li> <li>PUT</li> <li>DELETE</li> </ul> <div class="answer" data-value="2">To upload a file to the server, you would use the POST HTTP method with the Fetch API. The POST method is used for submitting data to be processed to a specified resource, which is suitable for file uploads. GET, PUT, and DELETE have different purposes.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3768/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3767">When using a for...of loop with strings, each iteration will provide a single _______.</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3767"> <rect x="0" y="0" width="85.714285714286%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3767)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>Character</li> <li>Word</li> <li>Line</li> <li>Number</li> </ul> <div class="answer" data-value="1">When using a for...of loop with strings, each iteration will provide a single character. This loop is useful for breaking down strings into individual characters for various processing tasks, such as counting characters or manipulating them individually.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3767/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3766">The switch statement evaluates expressions based on their _________.</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3766"> <rect x="0" y="0" width="83.333333333333%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3766)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>Values</li> <li>Cases</li> <li>Conditions</li> <li>Labels</li> </ul> <div class="answer" data-value="2">The switch statement in JavaScript evaluates expressions based on their cases. Each case represents a possible value that the expression can take, and the code block associated with the matching case is executed. This allows for multiple execution paths based on different values of the expression.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3766/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3765">In JavaScript, the _______ method is used to create a new object using an existing object as the prototype of the newly created object.</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3765"> <rect x="0" y="0" width="11.111111111111%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3765)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>Object.create()</li> <li>Object.assign()</li> <li>Object.extend()</li> <li>Object.instantiate()</li> </ul> <div class="answer" data-value="1">In JavaScript, the Object.create() method is used to create a new object with the specified prototype object. It allows you to create objects that inherit properties and methods from an existing object, making it a powerful tool for prototypal inheritance.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3765/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3788">In JavaScript, the ________ function is often used for delaying the execution of a function in an asynchronous manner.</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3788"> <rect x="0" y="0" width="25%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3788)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>setTimeout</li> <li>setInterval</li> <li>asyncWait</li> <li>delayFunction</li> </ul> <div class="answer" data-value="1">In JavaScript, the setTimeout function is often used for delaying the execution of a function in an asynchronous manner. It schedules the execution of a function after a specified time delay, allowing for tasks like animations or asynchronous operations to be handled.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3788/">Discuss it</a> </div> </div> <div class="card quiz mb-4"> <h1 class="h5 mx-4 mt-3 mb-0 quizid" data-id="3787">Which array method adds elements to the beginning of an array?</h1> <!-- star --> <div class="star d-flex align-items-center"> <svg aria-hidden="true" width="100%" height="100%" viewBox="0 0 70 14" fill="none" xmlns="http://www.w3.org/2000/svg"> <mask id="star-mask-3787"> <rect x="0" y="0" width="30%" height="100%" fill="white"></rect> </mask> <g class="star-filled" mask="url(#star-mask-3787)"> <use xlink:href="#icon-star" width="14" height="14" x="0"></use> <use xlink:href="#icon-star" width="14" height="14" x="14"></use> <use xlink:href="#icon-star" width="14" height="14" x="28"></use> <use xlink:href="#icon-star" width="14" height="14" x="42"></use> <use xlink:href="#icon-star" width="14" height="14" x="56"></use> </g> <g fill="transparent" class="star-bordered" stroke-width="2"> <use xlink:href="#icon-star" width="12" height="12" x="1" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="15" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="29" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="43" y="1"></use> <use xlink:href="#icon-star" width="12" height="12" x="57" y="1"></use> </g> </svg> <span aria-hidden="true" class="visually-hidden">Difficulty level</span> </div> <div class="option"> <ul> <li>push()</li> <li>unshift()</li> <li>concat()</li> <li>splice()</li> </ul> <div class="answer" data-value="2">The unshift() method is used to add elements to the beginning of an array. It's particularly useful when you want to insert one or more elements at the start of an existing array without affecting the order of the existing elements. Unlike push(), which adds elements to the end, unshift() works at the beginning.</div> </div> <div class="discuss"> <a class="btn btn-sm btn-secondary" rel="bookmark" href="/quiz/3787/">Discuss it</a> </div> </div> <nav class="my-4" aria-label="Page navigation" role="navigation"><span class="visually-hidden">Page navigation</span><ul class="pagination justify-content-center"><li class="page-item disabled"><span class="page-link">Page 1402 of 1523</span></li><li class="page-item"><a class="page-link" href="/quiz/" aria-label="First Page">«<span class="d-none d-lg-inline-block"> First</span></a></li><li class="page-item"><a class="page-link" href="/quiz/page/1401/" aria-label="Previous Page">‹<span class="d-none d-lg-inline-block"> Previous</span></a></li><li class="page-item"><a class="page-link" href="/quiz/page/1400/"><span class="visually-hidden">Page </span>1400</a></li><li class="page-item"><a class="page-link" href="/quiz/page/1401/"><span class="visually-hidden">Page 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