a2zinterviews

17.	What is the difference between getch() and getche()?
	Both getch() and getche() are used to read single character there is very little difference. Both functions accept a character input value from the user. When getch() is used, the key that was pressed will not appear on the screen. It is automatically captured and assigned to a variable. While when getche() is used, the key that was pressed by the user appears on the screen and is assigned to a variable.
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18.	What are actual arguments?
	When you create and use functions that need to perform an action on some given values, you need to pass these given values to that function. The values that are being passed into the called functions are referred to as actual arguments.
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19.	Is void pointer arithmetic a valid one?
	Arithmetic operation on void pointer is not valid one. Void pointer is a generic pointer. It is not referring int, char or any other data type specifically. So, we need to cast void pointer to specific type before applying arithmetic operations.
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20.	What is the difference between a and "a"?
	Where a is a character constant and "a" is a string.
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