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37.	What is an endless loop?
	An endless loop can mean two things. One is that it was designed to loop continuously until the condition within the loop is met, after which a break function would cause the program to step out of the loop. Another idea of an endless loop is when an incorrect loop condition was written, causing the loop to run erroneously forever. Endless loops are oftentimes referred to as infinite loops.
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38.	What are formal parameters?
	In using functions in a C program, formal parameters contain the values that were passed by the calling function. The values are substituted in these formal parameters and used in whatever operations as indicated within the main body of the called function.
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39.	What are the types of testing techniques?
	There are two types of testing techniques are Human testing Computer based testing
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40.	What is heap?
	Heap is an area of memory from where is allocated at runtime using malloc() or calloc() functions.
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