Answer / ramesh naik

In Bottom Up approach, the Child modules are developed
first. As the parent modules are developed, they are
integrated with the Child modules to perform integration
testing. In the process, if at all any parent module is
missing, inorder to continue the integration process, a
temporary program (called as DRIVER) is submitted in the
place of parent module.

Answer / nani

Hi,
Basically integration testing can done in two ways
Top-down approach and Bottom up approach.
in top down approach we can use stubs.
in bottom up approach we can use drivers for integrating
the modules.using drivers for each new module being tested
in integration with all lower-level modules.
eg: we need to integrate 3 A,B,C modules then by using this
approach the lowest-level modules "B" and "C" are tested
with drivers. Next, the higher-level module "A" is tested
with a driver in integration with modules "B" and "C."
Finally, integration could continue until the top-level
module of the program is tested (with real input data) in
integration with the entire program.

Answer / sreekanthreddy

drivers are simple program designed specifically for
testing that make calls to these lower layers......

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