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Javascript - CS - Sockets
Javascript - CS - Animation
Javascript - CS - Array and Function
Javascript - CS - Basic and Variables
Javascript - CS - Classes and Modules
Javascript - CS - Performance Measures
Javascript - CS - Caching and Debugging
Javascript - CS - Graphics and Rendering
Javascript - CS - Parsing, Benchmarking and Logging
Javascript - CS - Invocation and Performance Navigation
Javascript - CS - Server Side and Client Side Scripting
Javascript - CS - Document Object Model and Event Handling
  1. What is the inital step to set up a CSS Lazy Loading?

    2. A.

     Fetching data
    B.

     Loading the script
    C.

     Loading the page
    D.

     Adding the event listener

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  2. What is the purpose of holding whatever tag you create in the attribute type?

    3. A.

     To have more information
    B.

     To identify the scripting language
    C.

     All of the mentioned
    D.

     None of the mentioned

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  3. What does the appendChild() method perform?

    4. A.

     Appends a node in the middle of the index taken as the parameter
    B.

     Appends a node as the first child
    C.

     Appends a node as the last child
    D.

     None of the mentioned

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  4. What should be the value of the type attribute of a variable if the type of file is CSS?

    5. A.

     text/js/css
    B.

     text/js
    C.

     text/css
    D.

     text

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  5. How to lazy load images?

    6. A.

     Remove the rel attribute
    B.

     Remove the src attribute
    C.

     Make rel = src
    D.

     Make src = rel

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  6. What does the rel attribute of a variable have when the type of file is CSS?

    7. A.

     css
    B.

     stylesheet
    C.

     text/css
    D.

     all of the mentioned

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  7. What is the parameter of the method getElementsbyTagName() if we need to get an image?

    8. A.

     image
    B.

     src
    C.

     img
    D.

     imageurl

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  8. How do we stop blocking of loading and executing the perfLogger, a logging type data?

    9. A.

     Inlining the perfLogger
    B.

     Removing the perfLogger
    C.

     Placing the perfLogger before the “script” tag
    D.

     None of the mentione

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