# Knowledge check: Media elements

1. **Each square block in a table is called a:**
    
    * index
        
    * <mark>cell</mark>
        
    * unit
        
    * box
        
2. **What attribute can you add inside an audio tag to enable player controls such as the pause and volume buttons?**
    
    * src
        
    * source
        
    * audio
        
    * <mark>controls</mark>
        
3. **While using the canvas element from the HTML file inside your JavaScript file, you pass the value of the id attribute of the canvas to the** `document.getDocumentById()` **function in your JavaScript code.** 
    
    * **True**
        
    * **<mark>False</mark>**
        
4. **Which of the following attributes can you add to an iFrame to improve the security of the web page where the iFrame is added? Choose all that apply.**
    
    * <mark>sandbox=""</mark>
        
    * <mark>allow="camera 'none';"</mark>
        
    * style="border:none;"
        
    * <mark>allow="microphone 'none</mark>**<mark>'</mark>**<mark>;"</mark>
        
5. **GIF, 2D Canvas and WebGL are types of authoring tools.**
    
    * True
        
    * <mark>False</mark>
        
6. `.mp4` **is a type of**
    
    * File limiter
        
    * File template
        
    * <mark>File extension</mark>
        
    * File name