What are some cases that Selenium WebDriver cannot automate?

1.	What are some cases that Selenium WebDriver cannot automate?
Answer» Some of the scenarios which we cannot automate are as follows: SELENIUM WebDriver does not support bitmap comparison. Using Selenium WebDriver to automate Captcha is not possible. Using Selenium WebDriver, we are unable to READ bar codes. Video streaming scenarios: Selenium will almost never be able to recognise video controllers. To some EXTENT, JavaScript Executor and flex UI selenium will work, although they are not COMPLETELY dependable. Performance testing can be AUTOMATED, however, it's preferable to avoid using Selenium for performance testing.

Answer»

Some of the scenarios which we cannot automate are as follows:

SELENIUM WebDriver does not support bitmap comparison.
Using Selenium WebDriver to automate Captcha is not possible.
Using Selenium WebDriver, we are unable to READ bar codes.
Video streaming scenarios: Selenium will almost never be able to recognise video controllers. To some EXTENT, JavaScript Executor and flex UI selenium will work, although they are not COMPLETELY dependable.
Performance testing can be AUTOMATED, however, it's preferable to avoid using Selenium for performance testing.

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