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Hi, Below is a question on white box testing. Kindly help
me in answering it. How many test cases are needed to
obtain 100% branch coverage. This question was asked in
ISTQB foudation level exam - Dec21 2008.
Read(A,C)
If(A<10) then Print A;
Endif
If(C>100) then Print C is greater then A
else if(C<100) then print only C
Endif else
Options -
a. 4
b. 3
c. 2
d. 1
Kindly answer with explanation so that it would be easy to
understand
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Answer Posted / hima bindu
Number of testcases required for branch coverage will be 2.
In branch coverage we need to check whether all the
branches are exercised.
Here we have 3 branches all If statements we need to
consider.They are A<10,C>100,C<100
Line 1 - Read(A,C)
Line 2 - If(A<10) then
Line 3 - Print A;
Line 4 - Endif
Line 5 - If(C>100)then
Line 6 - Print C is greater then A
Line 7 - else if(C<100) then
Line 8 - print C
Line 9 - End if
So take the values as follows
Testcase 1 : A=5 and C=120
For this set of values Line1 - Line6 are executed
Now for the Line7 - Line9 to be executed take the value of
c as less than 100
So Testcase 2 : A=5(can be any value as Line 2,3,4 are
already exercised in testcase1)and c=80
For this set of values Line7-Line9 will be exercised
| Is This Answer Correct ? | 2 Yes | 2 No |
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