VAIBHAV SINGH
Selenium Issues

The methods sendKeys(CharSequence[])in the type WebElement is not applicable for arguments (String)

Solution:

Actually this is not Selenium Issue. This is eclipse Issue. You need to follow below steps to solve this issue.
1 - Right Click on your Project and open Properties.(Press Alt+Enter)
2 - Go to Java Compiler.
3 - In JDK Compliance, Unclick Use compliance from execution environment...
4 - In Drop Down Select Latest Value (1.7) and apply it.