Suggesting test data for a range check

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. A score must be from 0 to 100. Which is a NORMAL test value?

A 101 - it is inside the range, so it is accepted

B 50 - it is inside the range, so it is accepted

2. A score must be from 0 to 100. Which is a good ABNORMAL test value?

A -5 or "abc" - the data is invalid, so it is rejected

B -5 or "abc" - the data is valid, so it is accepted

3. For a score from 0 to 100, which pair are the EXTREME test values?

A -1 and 101 - the largest and smallest allowed values, accepted

B 0 and 100 - the largest and smallest allowed values, accepted

4. For a score from 0 to 100, which pair are the BOUNDARY test values at the upper limit?

A 100 accepted and 101 rejected

B 100 rejected and 101 accepted

5. For a score from 0 to 100, what should happen to the boundary test value -1?

A It is rejected because it is just below the lowest allowed value 0

B It is accepted because it is just below the lowest allowed value 0

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
150		A"abc" is not a number, so it is abnormal data and should be rejected. Normal data must be valid and inside the range.
2-5		BAbnormal test data for a score from 0 to 100. It is outside the range, so it is rejected.
3Extreme test data is the largest or smallest value that is still allowed, so it is accepted		CNormal test data for a score from 0 to 100. It is inside the range, so it is accepted.
4Boundary test data is the first value just outside the range, so it is rejected		D101 is outside the range 0 to 100, so it should be rejected. It is boundary data, not extreme data, because it is just beyond the limit.
5Test data for 0 to 100: 101 is extreme data and should be accepted		E101
6Test data for 0 to 100: "abc" is normal data and should be accepted		F100

Definitions

Range check test data

Fill in the Blanks

Complete each line of code by filling in the missing parts.

Range check: 0 to 100 50 - normal - ______

Range check: 0 to 100 -5 - ________ - REJECT

Range check: 0 to 100 Lowest extreme value: _

Range check: 0 to 100 101 - boundary - ______

IF Score >= 0 ___ Score <= 100 THEN

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A Range check: 0 to 100

B 50 is normal: accept

C -5 is abnormal: accept

Question 2

A Range check: 0 to 100

B 100 is extreme: reject

C 0 is extreme: accept

Question 3

A Range check: 0 to 100

B 50 is normal: accept

C 100 is boundary: accept

D 101 is boundary: accept

Question 4

A Range check: 1 to 100

B 0 is extreme: accept

C -1 is boundary: reject

Question 5

A IF Score >= 0 OR Score <= 100

B THEN OUTPUT "Accept"

C ELSE OUTPUT "Reject"

D ENDIF

Answer Key

Suggesting test data for a range check

Section A: Quick Questions

B — 50 - it is inside the range, so it is accepted

A — -5 or "abc" - the data is invalid, so it is rejected

B — 0 and 100 - the largest and smallest allowed values, accepted

A — 100 accepted and 101 rejected

A — It is rejected because it is just below the lowest allowed value 0

Section B: Match the Pairs

50 → Normal test data for a score from 0 to 100. It is inside the range, so it is accepted.

-5 → Abnormal test data for a score from 0 to 100. It is outside the range, so it is rejected.

Extreme test data is the largest or smallest value that is still allowed, so it is accepted → 100

Boundary test data is the first value just outside the range, so it is rejected → 101

Test data for 0 to 100: 101 is extreme data and should be accepted → 101 is outside the range 0 to 100, so it should be rejected. It is boundary data, not extreme data, because it is just beyond the limit.

Test data for 0 to 100: "abc" is normal data and should be accepted → "abc" is not a number, so it is abnormal data and should be rejected. Normal data must be valid and inside the range.

Section C: Definitions

Range check test data — Pick one normal, abnormal, extreme and boundary value for the range and say accept or reject. For 0 to 100: 50 normal, -5 abnormal, 100 extreme, 101 boundary.

Section D: Fill in the Blanks

Range check: 0 to 100
50 - normal - ACCEPT

Range check: 0 to 100
-5 - abnormal - REJECT

Range check: 0 to 100
Lowest extreme value: 0

Range check: 0 to 100
101 - boundary - REJECT

IF Score >= 0 AND Score <= 100 THEN

Section E: Spot the Error

C — -5 is below 0, so it is outside the range. Abnormal data must be rejected, so the line should say reject.

B — 100 is the largest value allowed, so it is extreme data and it is valid. It should be accepted, not rejected.

D — 101 is just above the highest allowed value of 100. It is a boundary value that is invalid, so it must be rejected.

A — The range starts at 0, not 1. The other lines accept 0 as extreme data, so the first line should be Range check: 0 to 100.

A — A range check needs AND, because the score must be at least 0 and at most 100. With OR every number passes, so abnormal data like -5 would be accepted.