Which of these can be successfully tested using Loop Testing methodology?
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Simple Loops
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Nested Loops
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Concatenated Loops
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All of the above
Loop testing methodology applies to all loop structures: simple loops (single iterations), nested loops (loops within loops), and concatenated loops (loops in sequence). The technique tests boundary conditions, typical cases, and stress scenarios for each structure type. Option D correctly includes all categories. Options A-C are each incomplete subsets.
Loop testing is a structural/white-box technique specifically designed to exercise loop constructs, and its standard variants cover simple loops, nested loops, and concatenated loops (as well as unstructured loops after restructuring). Because the technique's defined scope explicitly includes all of these loop types, 'all of the above' is correct rather than any single loop type alone.