UGC NET CSE | January 2017 | Part 3 | Question: 44

Question

Which of the following are facts about a top-down software testing approach?

1. Top-down testing typically requires the tester to build method stubs
2. Top-down testing typically requires the tester to build test drivers

• A. Only I
• B. Only II
• C. Both I and II
• D. Neither I nor II

Answer 1

Top down Testing: In this approach testing is conducted from main module to sub module. if the sub module is not developed a temporary program called STUB is used for simulate the submodule.

Bottom up testing: In this approach testing is conducted from sub module to main module, if the main module is not developed a temporary program called DRIVERS is used to simulate the main module.
 so answer is 1) only I

Answer 2

ans should be option (1 )only 

In computer science, test stubs are programs that simulate the behaviors of software components (or modules) that a module undergoing tests depends on.

“

Test stubs provide canned answers to calls made during the test, usually not responding at all to anything outside what's programmed in for the test.[1]

”

Test stubs are mainly used in incremental testing's top-down approach. Stubs are computer programs that act as temporary replacement for a called module and give the same output as the actual product or software.

Test Drivers are used during Bottom-up integration testing in order to simulate the behaviour of the upper level modules that are not yet integrated. Test Drivers are the modules that act as temporary replacement for a calling module and give the same output as that of the actual product.

Comments

directly from GALVIN

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galvin ?  it is from wiki https://en.wikipedia.org/wiki/Test_stub

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no bro, its from galvin.

read it properly you will find

Hint: it is in memry management chapter.

Answer 3

Test stubs are mainly used in incremental testing's top-down approach. Stubs are computer programs that act as temporary replacement for a called module and give the same output as the actual product or software

Ans- 1