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41.	What is the difference between the =symbol and ==symbol?
	The =symbol is often used in mathematical operations. It is used to assign a value to a given variable. On the other hand, the ==symbol, also known as "equal to" or "equivalent to", is relational operator that is used to compare two values.
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42.	What is mean by testing?
	Testing is the process of executing the program with sample or tested data.
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43.	What is meant by recursive function?
	If a function calls itself again and again, then that function is called Recursive function.
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44.	What is a global variable?
	The global variable is a variable that is declared outside of all the functions. The global variable is stored in memory, the default value is zero. Scope of this variable is available in all the functions.
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