Extreme data compared with boundary data

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Extreme data compared with boundary data

Name:
Date:
Class:
A

Quick Questions

Shade in the A or B circle for each question.

1. A program accepts whole numbers from 1 to 100. Which list is the EXTREME test data?
A 0, 1, 100 and 101
B 1 and 100
2. A program accepts whole numbers from 1 to 100. Which list is the BOUNDARY test data?
A 0, 1, 100 and 101
B 1 and 100
3. For a range of 1 to 100, which statement is true about the value 1?
A It is only extreme data, never boundary data
B It is both extreme data and boundary data
4. For a range of 1 to 100, the value 101 is which type of test data?
A Boundary data only (it is rejected)
B Extreme data and boundary data
5. A student answers 'Extreme data for 1 to 100 is 0, 1, 100 and 101.' What is wrong with this answer?
A It is the boundary list. Extreme data is only 1 and 100
B Nothing, this is the correct extreme data
B

Match the Pairs

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

Left columnRight column
1Extreme data: 1, 100 AThis list is incomplete. Boundary data must also include the rejected values next to each limit: 0 and 101.
2Boundary data: 0, 1, 100, 101 BExtreme: 1, 100 | Boundary: 0, 1, 100, 101
3Both lists contain the accepted limit values, so 1 and 100 appear in extreme data and in boundary data CThis is the boundary data list. Extreme data must only include the accepted limits 1 and 100, not the rejected 0 and 101.
4For a range of 1 to 50, the extreme data is just the two accepted limits DExtreme: 1, 50
5Extreme data for 1 to 100: 0, 1, 100, 101 EOnly the accepted values on the limits of the range 1 to 100
6Boundary data for 1 to 100: 1, 100 FThe accepted limit values plus the rejected values just outside each limit
C

Definitions

extreme vs boundary data
D

Fill in the Blanks

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

1.
// Range check: 1 to 100 // Extreme test data: 1 and ___
2.
// Range check: 1 to 100 // Boundary data: 0, 1, 100 and ___
3.
// Range check: 1 to 100 // Rejected boundary values: _ and 101
4.
// Range check: 1 to 100 // 0 is boundary data but not _______ data
5.
IF Number >= 1 AND Number __ 100 THEN OUTPUT "Accepted" ENDIF
E

Spot the Error

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

Question 1
A Range check: 1 to 100
B Extreme data: 0, 1, 100, 101
C Boundary data: 0, 1, 100, 101
Question 2
A Valid range is 1 to 100
B Extreme: 1, 101
C Boundary: 0, 1, 100, 101
Question 3
A Range check: 1 to 50
B Extreme data: 0 and 51
C Boundary data: 0, 1, 50, 51
Question 4
A Test a mark from 0 to 100
B Extreme: 0, 100
C Boundary: -1, 0, 100, 101
D Accepted in both: -1 and 101
Question 5
A Range 10 to 20
B Extreme: 10, 20
C Boundary: 10, 20

Answer Key

Extreme data compared with boundary data
Section A: Quick Questions
Q1
B — 1 and 100
Q2
A — 0, 1, 100 and 101
Q3
B — It is both extreme data and boundary data
Q4
A — Boundary data only (it is rejected)
Q5
A — It is the boundary list. Extreme data is only 1 and 100
Section B: Match the Pairs
Q1
Extreme data: 1, 100 → Only the accepted values on the limits of the range 1 to 100
Q2
Boundary data: 0, 1, 100, 101 → The accepted limit values plus the rejected values just outside each limit
Q3
Both lists contain the accepted limit values, so 1 and 100 appear in extreme data and in boundary data → Extreme: 1, 100 | Boundary: 0, 1, 100, 101
Q4
For a range of 1 to 50, the extreme data is just the two accepted limits → Extreme: 1, 50
Q5
Extreme data for 1 to 100: 0, 1, 100, 101 → This is the boundary data list. Extreme data must only include the accepted limits 1 and 100, not the rejected 0 and 101.
Q6
Boundary data for 1 to 100: 1, 100 → This list is incomplete. Boundary data must also include the rejected values next to each limit: 0 and 101.
Section C: Definitions
Q1
extreme vs boundary data — Extreme data is only the accepted limit values, e.g. 1 and 100. Boundary data has those plus the rejected values next to them: 0, 1, 100 and 101 for a range of 1 to 100.
Section D: Fill in the Blanks
Q1
// Range check: 1 to 100 // Extreme test data: 1 and 100
Q2
// Range check: 1 to 100 // Boundary data: 0, 1, 100 and 101
Q3
// Range check: 1 to 100 // Rejected boundary values: 0 and 101
Q4
// Range check: 1 to 100 // 0 is boundary data but not extreme data
Q5
IF Number >= 1 AND Number <= 100 THEN OUTPUT "Accepted" ENDIF
Section E: Spot the Error
Q1
B — Extreme data is only the accepted limit values, 1 and 100. The list 0, 1, 100, 101 is boundary data, so line 2 should read 'Extreme data: 1, 100'.
Q2
B — 101 is rejected, so it cannot be extreme data. Extreme data is only the accepted limits, 1 and 100.
Q3
B — 0 and 51 are the rejected values next to the limits, so they are boundary data only. Extreme data for 1 to 50 is 1 and 50.
Q4
D — -1 and 101 are rejected, so they appear only in boundary data. The accepted limits 0 and 100 appear in both lists.
Q5
C — Boundary data must also include the rejected values next to the limits, 9 and 21. Without them it is just extreme data.