You are testing a machine that scores exam papers and assigns grades. Based on the score achieved the grades are as follows: 1-49 = F, 50-59 = D-, 60-69 = D, 70-79 = C, 80-89 = B, 90-100=A If you apply equivalence partitioning, how many test cases will you need to achieve minimum test coverage?

Equivalence Partitioning also called as equivalence class partitioning. It is abbreviated as ECP. It is a software testing technique that divides the input test data of the application under test into each partition at least once of equivalent data from which test cases can be derived.

An advantage of this approach is it reduces the time required for performing testing of a software due to less number of test cases.

ap8997154 ap8997154 · Answer 2 · 2022-01-12T14:04:39+01:00

The number of cases needed to achieve minimum test coverage is 6.

Equivalence partitioning

A software testing technique that creates the segments in the input data of scores that helps us to assign values.

Testing Theory

According to the testing theory of equivalence partitioning, only one test case of each partition is needed to evaluate the behavior of the program for the related partition.

Given to us,

A = 100 - 90

B = 89 - 80

C = 79 - 70

D = 69 - 60

-D = 59 - 50

E = 49 - 1

Therefore, a total of 6 test cases are there.

If the scores will be within the limit of 1-100 the scores can be assigned, therefore, 6 test cases will be needed to achieve minimum test coverage.

Hence, the number of cases needed to achieve minimum test coverage is 6.

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