Senior Front End Developer Quiz Questions And Answers

HTML stands for Hyper Text Markup Language. It is the standard markup language used for creating web pages and web applications. It uses markup tags to structure the content and define the layout and appearance of the web page. Hyperlinks, which allow users to navigate between different web pages, are a key feature of HTML.

The above statement evaluates to the number 1234.

The two methods of forms transfer are "Get" and "Post". The "Get" method is used to retrieve data from a server, while the "Post" method is used to send data to a server. These methods are commonly used in web development to transfer form data between the client and server.

The pseudo class :root in an HTML document always refers to the element. This is because the :root pseudo class represents the root element of the document, which is the element. Therefore, the statement is true.

The correct answer is "Doctype" because the Doctype declaration is used to specify the version of the markup language (such as HTML or XHTML) that the web page is written in. It is placed at the very beginning of the HTML document and informs the web browser about how to interpret and render the page correctly.

The given HTML is valid because it follows the correct syntax and structure of HTML markup. It starts with the opening tag and ends with the closing tag. The content within the HTML tags is properly formatted and there are no errors or missing elements. Overall, the HTML code is complete and can be rendered correctly by web browsers.

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The statement "10 4321 91" is not a valid mathematical expression. It appears to be a list of numbers separated by spaces. Therefore, it does not evaluate to a specific value. The answer "91" is likely just the last number in the list, but it does not represent the evaluation of the statement.

The screen keyword in CSS applies to the browser's viewport, not the device's physical screen. The viewport refers to the area of the web page that is currently visible to the user. This distinction is important because the size and dimensions of the viewport can vary depending on the device and browser being used. By using the screen keyword, developers can ensure that their CSS styles are applied specifically to the visible area of the webpage, providing a consistent experience across different devices and browsers.

Yes, the HTML above triggers an HTTP request when the page first loads. This is because HTML is a markup language used to structure the content of a webpage, and when a webpage is accessed, the browser makes an HTTP request to the server to fetch the HTML file. The server then responds with the HTML code, which is then rendered by the browser to display the webpage. Therefore, the HTML code itself does not directly trigger the request, but it is a necessary step in the process of loading a webpage.

Yes, main1.css has to be downloaded and parsed before Hello World is alerted. This is because main1.css is an external CSS file that is linked to the HTML document. CSS files are typically loaded and parsed before the HTML content is rendered, so any CSS rules or styles defined in main1.css will be applied to the HTML elements. In this case, if there is a CSS rule in main1.css that affects the element responsible for the "Hello World" alert, it needs to be downloaded and parsed first in order for the alert to be displayed correctly.

To clear a floated element, you can use the CSS property "clear" with the value "both". This will ensure that no floating elements are allowed on either side of the cleared element. By using "clear:both", you are essentially clearing both the left and right floats, allowing the element to appear below any floated elements in the document flow.

The code defines a variable x with an initial value of 1 and a function bar() that sets the property x of the current object (this.x) to 2 and returns the value of the global variable x. A new object foo is created using the bar() constructor, and the alert(foo.x) statement displays the value of the property x of the foo object, which is 2.

The HTML code provided does not contain any elements or attributes that would trigger an HTTP request when the page first loads. However, it is important to note that the given answer may be correct if there is additional code or scripts not shown in the given HTML snippet that could potentially initiate an HTTP request.

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The tag does indeed change the direction of text. It stands for "Bi-Directional Override" and allows you to override the default text direction of a document. This can be useful when dealing with languages that are read from right to left, such as Arabic or Hebrew. By using the tag, you can ensure that the text is displayed correctly according to the desired direction.

In JavaScript, 'this' refers to the object that owns the object. This means that 'this' refers to the object that is the parent or creator of the current object. It is used to access properties and methods of the owning object within the object itself.

The position of #example will remain unchanged, but all elements succeeding #example will move 5px upwards.

There are three ways to apply colors in CSS. The first way is by using named colors, where you can directly specify the name of the color. The second way is by using hexadecimal color codes, where you can specify the color using a combination of six characters (0-9 and A-F). The third way is by using RGB values, where you can specify the amount of red, green, and blue to create a specific color.

The value that is alerted is 3.

The code creates an array named arr and assigns the values 'a' and 'b' to its first two elements. The line arr.foo = 'c' adds a property named 'foo' to the array object and assigns it the value 'c'. However, this does not affect the length of the array, which remains 2. Therefore, the alert(arr.length) statement will display the value 2.

Setting margin-top and margin-bottom does not have an effect on an inline element. Inline elements are displayed in a line next to each other and do not have any vertical space around them. Margins only affect block-level elements, which are displayed as blocks and have space around them. Therefore, setting margin-top and margin-bottom on an inline element will not change its position or spacing.

A sprite is described as a collection of images put in a single image. Sprites are commonly used in computer graphics and game development to represent characters or objects that can be animated or interacted with. By combining multiple images into one, sprites can be easily manipulated and displayed on screen, making them a popular choice for creating animations and visual effects.

The scoped attribute in HTML applies style rules to all children of the scoped parent element. This means that any style rules specified within the scoped element will only affect the elements inside it, and not any other elements outside of it. It provides a way to encapsulate styles and limit their scope to a specific section of the HTML document.

The tag is a valid HTML5 tag. It is used to generate a key pair, consisting of a public key and a private key, which can be used for encryption and decryption purposes. This tag is mainly used in web forms where secure communication is required, such as for user authentication or digital signatures.

Unused style resources are not downloaded by the browser. This is because when the browser parses the HTML and encounters a link or import tag for a CSS file, it will only download and apply the styles if they are actually used on the page. If the styles are not used, the browser will skip downloading them to optimize performance and reduce unnecessary network requests.

Setting padding-top and padding-bottom on an inline element does not add to its dimensions. Padding only affects the content within the element, not the overall size or dimensions of the element itself. Therefore, the padding will not increase the height or width of the inline element.

The translate() function is used to move the position of an element on the x-axis and y-axis, not the z-axis. Therefore, the given statement is false.

The correct answer is "function" because when the code is executed, it will alert the word "function".

The tag is used to indicate smaller, fine print text. In this case, it would be appropriate to use the tag when adding copyright information inside a

The color of the text "Sausage" is blue.

The question is asking whether the image file "mypic.jpg" will be downloaded by the browser on page load. The answer is "No" because there is no HTML or CSS code provided in the question that would instruct the browser to download the image. Without any specific code to include the image on the page, the browser will not download it.

The main2.css file is an external CSS file that is linked to the HTML document. CSS files are responsible for styling the HTML elements on the page. In order for Paragraph 1 to be rendered on the page with the correct styling, the main2.css file needs to be downloaded and parsed first. This is because the CSS file contains the rules and instructions for how the elements should be displayed. Therefore, the correct answer is "Yes".

The font-size property with a value of 10rem sets the font size to 10 times the size of the root element's font size. This means that the font size will remain fixed and will not adjust responsively when the user resizes or drags the browser window.

The HTML tag that is used to highlight the search term in a page of search results is the tag. This tag is specifically designed to highlight or mark a section of text in a document. It is commonly used in search engines or text editors to visually distinguish the searched term from the rest of the content.

The value that is alerted in this case is 1.

The CSS property "overflow: hidden" does create a new block formatting context. This means that any content inside the element with this property will be contained within its own block, and will not interact with content outside of it. This can be useful for controlling the layout and positioning of elements on a webpage.

The pseudo class :checked will select inputs with type radio or checkbox, but it will also select elements. Therefore, the given statement is false.

CSS property names are not case-sensitive. This means that whether you write a property name in uppercase or lowercase, it will still be recognized by the browser. For example, "color" and "COLOR" will both be understood as the same property. However, it is a best practice to consistently use lowercase letters for CSS property names to ensure consistency and readability in your code.

The value that is alerted is 2.

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The only selector is used to stop older browsers from parsing the remainder of the selector. This means that if a browser does not support the only selector, it will not apply any styles or rules that come after it in the selector. This can be useful for ensuring that certain styles are only applied to modern browsers that support the only selector, while older browsers will simply ignore those styles.

The question is asking whether the main1.css file needs to be downloaded and parsed before the main2.css file can be fetched. The correct answer is "No" because CSS files can be fetched and parsed independently of each other. The order in which the files are fetched does not affect their ability to be parsed.

The order of values alerted is 3, 1.

The code defines a global variable x with a value of 4 and an object obj with a property x set to 3 and a method bar(). Inside bar(), a local variable x is declared with a value of 2, and a setTimeout() function is called. The setTimeout() function defines another nested function that declares a local variable x with a value of 1 and then alerts the value of this.x.

When obj.bar() is called, the setTimeout() function schedules the nested function to be executed after 1000 milliseconds (1 second). When the nested function is executed, the value of this refers to the global window object, not the obj object. Therefore, this.x refers to the global variable x, which has a value of 4. Hence, the value alerted is 4.

The value that is alerted is a number.

The value that is alerted in this case is "undefined". This is because there is no specific value assigned to be alerted in the given code. When a variable or object is not assigned a value, it is considered to be "undefined". Therefore, when the code is executed, it will alert the value of "undefined".