CT 9 Flashcards

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Purpose of test data

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Test data helps verify the correct functioning of an algorithm or program.

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You should test to make sure bad input is not allowed into your algorithm or program.

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Testing ensures that bad input is not accepted by your algorithm or program.

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There are three types of test data.

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The three types of test data are Valid (normal), Erroneous, and Boundary (extreme).

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One-dimensional data structures are referred to as

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an array or list

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Common characteristic of each item in a one-dimensional data structure

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Each item is the same data type.

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Accessing an item in a one-dimensional data structure

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Uses a single index to access an item.

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Implementation of one-dimensional data structures in Python

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Implemented in Python as a list.

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Building a sequence of indices in reverse

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Use `range(start index, stop index, step)` with `range(end of list, beginning of list, -1)`.

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Trace table worked example

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The code initializes a list and calculates the total by iterating through the list in reverse order, updating the total and position in each iteration.

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Locate and fix syntax errors

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Syntax errors are found in parts of code that break the rules of the programming language. Tips: Your integrated development environment (IDE) can help identify these, sometimes, without even running the code. Errors are sometimes reported on a line after the real error. Check the code around the reported line.