Intro to Client-Side Scripting with Javascript CS380
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Questions and Answers

What is a key advantage of using client-side programming, specifically JavaScript?

  • Ability to make small, quick changes to a page without waiting for the server (correct)
  • Access to server's private data
  • Direct connections to databases
  • Enhanced security measures

    • Which of the following best describes the purpose of JavaScript in web development?

  • To create dynamic web pages with PHP
  • To secure server data access
  • To enhance user experience through interactive web elements (correct)
  • To manage server-side database connections

    • One of the advantages of server-side programming over client-side programming is:

  • Ability to connect to databases and write files (correct)
  • Faster user interface updates
  • Access to browser information
  • Improved browser compatibility

    • What type of language is JavaScript considered to be?

    <p>Lightweight programming language ('scripting language')</p> Signup and view all the answers

    Which of the following is a common task that JavaScript can perform on a user's computer?

    <p>Perform calculations for form validation</p> Signup and view all the answers

    In client-side scripting, what advantage does JavaScript offer in terms of user interaction?

    <p>Quick changes to a page without server interaction</p> Signup and view all the answers

    Which of the following is a similarity between JavaScript and PHP?

    <p>Both have built-in regular expressions</p> Signup and view all the answers

    What is a key difference mentioned between JavaScript and PHP?

    <p>Javascript is more procedural while PHP is more object-oriented</p> Signup and view all the answers

    Where should the

    <p>In the head section</p> Signup and view all the answers

    Which of the following accurately describes JavaScript error handling?

    <p>Errors are mostly silent with a few exceptions</p> Signup and view all the answers

    What is a common characteristic of JavaScript and Java?

    <p>Similar rules and syntax</p> Signup and view all the answers

    "join" in JavaScript is used for?

    <p>Converting an array to a single string with a delimiter</p> Signup and view all the answers

    What is the purpose of the 'typeof' keyword in JavaScript?

    <p>To check the type of a variable</p> Signup and view all the answers

    In JavaScript, what does the null value represent?

    <p>A variable that has not been assigned a value</p> Signup and view all the answers

    Which of the following is NOT a method of the Math object in JavaScript?

    <p>increment</p> Signup and view all the answers

    What happens when you try to multiply a string '2' by a number 3 in JavaScript?

    <p>The string is converted to a number and then multiplied</p> Signup and view all the answers

    Which operator in JavaScript is used for finding the remainder of a division operation?

    <p>%</p> Signup and view all the answers

    What does the 'var' keyword signify when declaring variables in JavaScript?

    <p>It defines a variable within a function scope</p> Signup and view all the answers

    What type of programming is characterized by writing programs driven by user events?

    <p>Event-driven programming</p> Signup and view all the answers

    How are JavaScript programs different from traditional programs in terms of initiating actions?

    <p>JavaScript programs wait for user actions/events, while traditional programs start with a main method.</p> Signup and view all the answers

    Which of the following steps is essential for creating a responsive button in HTML?

    <p>Choose the control and event of interest, write a JavaScript function, attach the function to the event on the control</p> Signup and view all the answers

    What is an example of an event handler attribute in HTML?

    <p>onclick</p> Signup and view all the answers

    Why is popping up an alert window considered disruptive and annoying in user experience?

    <p>It interrupts the user's flow and forces immediate attention.</p> Signup and view all the answers

    In JavaScript, where should statements be placed to ensure they are evaluated in response to user events?

    <p>Functions</p> Signup and view all the answers

    What is the purpose of the document object model (DOM) in JavaScript?

    <p>To manipulate elements' state on an HTML page.</p> Signup and view all the answers

    How can you change the color of a textbox using JavaScript?

    <p>By using the 'style.color' property of the textbox element.</p> Signup and view all the answers

    Which method is used to access an element by its id in JavaScript?

    <p>getElementById</p> Signup and view all the answers

    What does the innerHTML property allow you to do with elements in the DOM?

    <p>Change the text inside most elements.</p> Signup and view all the answers

    How can you change a paragraph to have a red color using JavaScript?

    <p>Use the 'color' property to set it to red.</p> Signup and view all the answers

    Which property is used to change the font size of an element in JavaScript?

    <p>'font-size'</p> Signup and view all the answers

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