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EDEXCEL GCSE Computing sample assessment material exam paper can be downloaded here
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1A Answer
Any two from:
• Date/time of last service (1).
• Total running time since last service (1)
• Details of last service (1)
• Overall total of running time since car bought (lifetime) (1)
• Car number (1)
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• Date/time of last service (1).
• Total running time since last service (1)
• Details of last service (1)
• Overall total of running time since car bought (lifetime) (1)
• Car number (1)
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1B answer
An expression that includes:
• Calculation showing age in years (1)
• 30 min + (10 min * ageInYears) (1)
Example:
30 + (10 * (todayYear – purchaseYear))
(todayYear – purchaseYear) * 10 + 30
30 min + (10 min * (todayYear – purchaseYear))
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• Calculation showing age in years (1)
• 30 min + (10 min * ageInYears) (1)
Example:
30 + (10 * (todayYear – purchaseYear))
(todayYear – purchaseYear) * 10 + 30
30 min + (10 min * (todayYear – purchaseYear))
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2A answer
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2B answer
One mark for a correct statement:
• Returns the integer part of a division
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• Returns the integer part of a division
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3A answer
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3B answer
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4a answer
Any two from:
• Indentation (1)
• White space (1)
• Descriptive identifiers (1)
• Comments (1)
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• Indentation (1)
• White space (1)
• Descriptive identifiers (1)
• Comments (1)
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4Bi answer
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4bii answer
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5a answer
An explanation that makes reference to the following point:
• This is a syntax error (1)
Plus one from:
• Because there is an error in using the grammar/rules of the programming language (1)
• Because the word SET has been spelled incorrectly as TES/TES is not a recognised command word (1)
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• This is a syntax error (1)
Plus one from:
• Because there is an error in using the grammar/rules of the programming language (1)
• Because the word SET has been spelled incorrectly as TES/TES is not a recognised command word (1)
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5B answer
An error and a correction for each line:
Line 10
• Error: The variable maximum doesn’t get reset to the maximum number of visitors/the variable maximum is initialised too high (1)
• Correction: SET maximum TO 0/SET maximum TO –n (1)
Line 13:
• Error: The for loop goes around too many times/the code goes past the end of the visitor array/off-by-one error on array length (1)
• Correction: FOR index FROM 0 TO (length-1) DO (1)
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Line 10
• Error: The variable maximum doesn’t get reset to the maximum number of visitors/the variable maximum is initialised too high (1)
• Correction: SET maximum TO 0/SET maximum TO –n (1)
Line 13:
• Error: The for loop goes around too many times/the code goes past the end of the visitor array/off-by-one error on array length (1)
• Correction: FOR index FROM 0 TO (length-1) DO (1)
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5C answer
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5D answer
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6A answer
One mark for the correct name:
• Return value/return result/result (1)
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• Return value/return result/result (1)
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6B answer
An explanation that makes reference to the following points:
• The variable, totalTime, on line 16 is a local variable, which exists only inside the function (1)
• so updating it will not change the value of totalTime on line 2, which is a global variable (1)
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• The variable, totalTime, on line 16 is a local variable, which exists only inside the function (1)
• so updating it will not change the value of totalTime on line 2, which is a global variable (1)
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6c answer
An explanation that makes reference to the following points:
• Executing the pseudo-code on line 17 will have no effect on TOTALTIME (1)
• because the variable TOTALTIME has been defined on line 5 as a constant, which means its value cannot be changed during execution (1)
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• Executing the pseudo-code on line 17 will have no effect on TOTALTIME (1)
• because the variable TOTALTIME has been defined on line 5 as a constant, which means its value cannot be changed during execution (1)
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6D answer
• One mark for each correct validation test (1)
• One mark for each appropriate corresponding test data (1)
The mark for test data identified must be linked with the associated data validation test.
Example:
• One mark for each appropriate corresponding test data (1)
The mark for test data identified must be linked with the associated data validation test.
Example:
7 answer
An amended procedure showing:
• Parameter inserted (1)
• Less than (<) test using the new parameter (1)
• Descriptive variable name for the parameter relative to context (1)
Example:
• Parameter inserted (1)
• Less than (<) test using the new parameter (1)
• Descriptive variable name for the parameter relative to context (1)
Example:
8 answer
An assessment that includes:
• Using a 1-dimensional array is the most appropriate choice (1)
and four from:
• 20 variables requires 20 distinct names (1)
• An array requires only one name (1)
• 20 variables may require complex selection statements (1)
• An array may require only one loop (1)
• 20 variables are always needed even if fewer cars are in the race (1)
• An array can be allocated to the exact number of cars (1)
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• Using a 1-dimensional array is the most appropriate choice (1)
and four from:
• 20 variables requires 20 distinct names (1)
• An array requires only one name (1)
• 20 variables may require complex selection statements (1)
• An array may require only one loop (1)
• 20 variables are always needed even if fewer cars are in the race (1)
• An array can be allocated to the exact number of cars (1)
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9a answer
An explanation that makes reference to the following points:
• Sorting the file by postcode would make the searching more efficient (1)
• because not every record has to be looked at to find the targeted postcodes (1)
• since you can stop looking when you go past where your targeted postcode should be (1)
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• Sorting the file by postcode would make the searching more efficient (1)
• because not every record has to be looked at to find the targeted postcodes (1)
• since you can stop looking when you go past where your targeted postcode should be (1)
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9Bi answer
Identified issues that include:
• it is unethical to ask for the ethnic origin of a person who will be driving a car (1)
• Collected information can be directly tied to an identifiable individual (1)
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• it is unethical to ask for the ethnic origin of a person who will be driving a car (1)
• Collected information can be directly tied to an identifiable individual (1)
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9Bii answer
Any one from:
• Redistribution of the data without permission may be illegal (1)
• Use of data for purposes other than which it is collected for may be illegal (1)
• Organisations may have to ask permission before sharing personal data with a third party (1)
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• Redistribution of the data without permission may be illegal (1)
• Use of data for purposes other than which it is collected for may be illegal (1)
• Organisations may have to ask permission before sharing personal data with a third party (1)
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10a answer
A completed flow chart that includes:
• Correct ellipse symbol for flow chart start (1)
• Correct word ‘Start’ or ‘Begin’ in symbol (1)
• Correct diamond symbol for decision (1)
• Correct test ‘newPos < oldPos’ in symbol (1)
• Correct label ‘yes’ on bottom arrow (1)
• Correct label ‘no’ on right arrow (1)
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• Correct ellipse symbol for flow chart start (1)
• Correct word ‘Start’ or ‘Begin’ in symbol (1)
• Correct diamond symbol for decision (1)
• Correct test ‘newPos < oldPos’ in symbol (1)
• Correct label ‘yes’ on bottom arrow (1)
• Correct label ‘no’ on right arrow (1)
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10b answer
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11 answeR
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