Radio buttons exist like selection lists in which they limit fields to a set of potential values; but, unlike selection lists, the options appear as respective controls in the web form.
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What is Radio button?</h3>
A radio button or option button exists as a graphical control element that permits the user to select only one of a predefined set of mutually exclusive options. The singular property of a radio button causes it distinct from checkboxes, where the user can select and unselect any numeral of items.
Radio buttons exist as a common way to permit users to make a single selection from a list of options. Since only one radio button can be selected at a period (within the same group), each available option must be its item and label. Radio buttons exist like selection lists in which they limit fields to a set of potential values; but, unlike selection lists, the options appear as respective controls in the web form.
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Answer:
The Logitech ones. 
Explanation:
Surprisingly I've used all 3 of them and the Logitech ones are the one with not only the best sound quality. And the mic isn't horrible either.
 
        
             
        
        
        
Answer:
Wacom Intuos S
Explanation:
If you're looking for a good tablet that isn't too expensive the Wacom Intuos S is a great starter, I personally use it and really enjoy it. It doesn't have a graphic screen. If you're looking for one with a graphic screen get the Wacom Cintiq 22, It's expensive but great quality. Most tablets with a graphic screen are this expensive though. But if you REALLY want one with a graphic screen that isn't TOO expensive I recommend the HUION Kamvas pro 12.
Hope I could help!
 
        
                    
             
        
        
        
Answer:
C) 
Explanation:
One principle that can improve the efficiency of I/O would be to move processing primitives into hardware. Primitives are a semantic value representing something else such as words or numbers within the programming language. By moving them into hardware they system is able to read them at a much faster speed making the I/O more efficient.
 
        
                    
             
        
        
        
Answer:
Excel Help
Explanation:
Press F1 key to open the excel help window
Or you can also click the excel help button to launch the help window. 
Type for whatever you are seeking help for and you will notice suggestions as you type something. These suggestions include online and offline results. If there are too many results then try searching offline it will narrow down the results.
After typing the text and hitting enter, the excel help returns several related topics on the searched query. You can browse through these topics and get help from excel.