4 marksDescribe the purpose of validation and verification checks during data entry.
Include an example for each.
Validation check ......................................................................................................
Verification check ....................................................................................................
[4]
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3 marksA programmer has written an algorithm to check that prices are less than $10.00
These values are used as test data:
10.00 9.99 ten
State why each value was chosen as test data.
10.00 .........................................................................
9.99 ............................................................................
ten ...............................................................................
[3]
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2 marksTASK 1 – Set up arrays
Set-up one dimensional arrays to store:
• Student names
• Student marks for Test 1, Test 2 and Test 3
o Test 1 is out of 20 marks
o Test 2 is out of 25 marks
o Test 3 is out of 35 marks
• Total score for each student
Input and store the names for 30 students. You may assume that the students’ names are unique.
Input and store the students’ marks for Test 1, Test 2 and Test 3. All the marks must be validated on entry and any invalid marks rejected
Set 1 .........................................
Reason for choice ......................................
Set 2 .....................................................
Reason for choice .........................................
[2]
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2 marksJatinder uses Internet banking.
This pseudocode checks her PIN.
c ← 0
INPUT PIN
x ← PIN
REPEAT
x ← x/10
c ← c + 1
UNTIL x < 1
IF c <> 5
THEN
PRINT “error in PIN entered”
ELSE
PRINT “PIN OK”
ENDIF
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2 marksDescribe, with examples, two sets of test data you would use to test your algorithm.
1 ..................................................
2 ...................................................
[2]
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3 marksTick (✓) one box in each row to identify if the statement is about validation, verification or both.
| Statement | Validation (✓) |
Verification (✓) |
Both (✓) |
| Entering the data twice to check if both entries are the same. |
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| Automatically checking that only numeric data has been entered. |
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| Checking data entered into a computer system before it is stored or processed. |
|||
| Visually checking that no errors have been introduced during data entry. |
[3]
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