Abnormal test data

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Quick Questions

Shade in the A or B circle for each question.

1. A program accepts an age from 1 to 120. Which value is abnormal test data?

A -5

B 35

2. A program asks for a whole-number age. Which is abnormal test data?

A 17

B abc

3. What should a program do with abnormal test data?

A Reject it

B Accept it

4. A name field must not be left empty. Which input is abnormal test data?

A An empty input

B Maya

5. A mark must be a number from 0 to 100. Which is abnormal test data?

A 70

B seventy

Match the Pairs

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

Left column		Right column
1Age: -5 (allowed range 0 to 120)		ATest input: -20 \| Expected result: rejected with an error message
2Age: "abc" (a whole number is needed)		BTest input: (nothing typed) \| Expected result: rejected
3An empty input is abnormal test data, and the expected outcome is that it is rejected		C50 is inside the allowed range, so it is normal data and would be accepted. Abnormal data would be a value like -5 or 150.
4Abnormal test data is chosen so that the program should reject it, not accept it		DAbnormal data should be rejected. Letters are the wrong type for an age, so the expected result should be rejected, not accepted.
5Age range 0 to 120. Abnormal test data: 50. Expected result: rejected		EAbnormal test data: a negative age is outside the allowed values, so the program should reject it
6Abnormal test data: "abc" for an age. Expected result: accepted		FAbnormal test data: letters are the wrong data type for a number, so the program should reject them

Definitions

Abnormal test data

Fill in the Blanks

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

Value: -5 for Age (allowed 0 to 120) Test data type: ________

Test value for Age: "cat" Test data type: Abnormal Expected outcome: ________

IF Age < 0 THEN ______ "Rejected" ENDIF

INPUT Age IF LENGTH(Age) = _ THEN OUTPUT "Rejected"

IF Age < 0 __ Age > 120 THEN OUTPUT "Rejected" ENDIF

Spot the Error

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

Question 1

A Field: Age (range 0 to 120)

B Test data: -5

C Type: normal

D Expected: rejected

Question 2

A Field: Age (whole number)

B Test data: abc

C Expected: accepted

D Type: abnormal

Question 3

A INPUT Age

B IF Age < 0 OR Age > 120 THEN

C OUTPUT "Rejected"

D ENDWHILE

Question 4

A INPUT Age

B // Reject below 0 or above 120

C IF Age < 0 AND Age > 120 THEN

D OUTPUT "Rejected"

E ENDIF

Question 5

A INPUT Name

B IF Name <> "" THEN

C OUTPUT "Rejected"

D ENDIF

Answer Key

Abnormal test data

Section A: Quick Questions

A — -5

B — abc

A — Reject it

A — An empty input

B — seventy

Section B: Match the Pairs

Age: -5 (allowed range 0 to 120) → Abnormal test data: a negative age is outside the allowed values, so the program should reject it

Age: "abc" (a whole number is needed) → Abnormal test data: letters are the wrong data type for a number, so the program should reject them

An empty input is abnormal test data, and the expected outcome is that it is rejected → Test input: (nothing typed) | Expected result: rejected

Abnormal test data is chosen so that the program should reject it, not accept it → Test input: -20 | Expected result: rejected with an error message

Age range 0 to 120. Abnormal test data: 50. Expected result: rejected → 50 is inside the allowed range, so it is normal data and would be accepted. Abnormal data would be a value like -5 or 150.

Abnormal test data: "abc" for an age. Expected result: accepted → Abnormal data should be rejected. Letters are the wrong type for an age, so the expected result should be rejected, not accepted.

Section C: Definitions

Abnormal test data — Test data of the wrong type or outside the allowed values, such as -5 or letters for an age, or an empty input. The program should reject it.

Section D: Fill in the Blanks

Value: -5 for Age (allowed 0 to 120)
Test data type: Abnormal

Test value for Age: "cat"
Test data type: Abnormal
Expected outcome: Rejected

IF Age < 0 THEN
    OUTPUT "Rejected"
ENDIF

INPUT Age
IF LENGTH(Age) = 0 THEN
    OUTPUT "Rejected"

IF Age < 0 OR Age > 120 THEN
    OUTPUT "Rejected"
ENDIF

Section E: Spot the Error

C — -5 is outside the allowed range 0 to 120, so it is abnormal test data, not normal. Line 3 should be 'Type: abnormal'.

C — Letters are the wrong data type for an age, so the program should reject them. Line 3 should be 'Expected: rejected'.

D — An IF statement must be closed with ENDIF, not ENDWHILE. Line 4 should be ENDIF.

C — No number can be both below 0 and above 120, so AND would never reject abnormal data like -5. It should use OR.

B — Abnormal data here is an empty input, so the condition must test for an empty string with =, not <>. Line 2 should be IF Name = "" THEN.