Differentiate between the top down and the bottom up approach in designing software

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S.No.

Top-Down Approach

Bottom-Up Approach

1.

In this approach, the problem is broken down into smaller parts.

In this approach, the smaller problems are solved.

2.

It is generally used by structured programming languages such as C, COBOL, FORTRAN, etc.

It is generally used with object oriented programming paradigm such as C++, Java, Python, etc.

3.

It is generally used with documentation of module and debugging code.

It is generally used in testing modules.

4.

It does not require communication between modules.

It requires relatively more communication between modules.

5.

It contains redundant information.

It does not contain redundant information.

6.

Decomposition approach is used here.

Composition approach is used here.

7.

The implementation depends on the programming language and platform.

Data encapsulation and data hiding is implemented in this approach.

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