Lesson 4.13.1.4

4.13.1.4 Testing Quiz: AQA Computer Science, Unit 13

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.13.1.4, Testing: 20 multiple choice questions for the AQA Computer Science (7517), Unit 13: Systematic approach to problem solving, written with Revision Ninja.

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The 20 questions

  1. What must an implementation be tested for?

    • The colour of its buttons, using a paint program on the screen.
    • The name of the programmer, using a list of the staff who work in the company.
    • The presence of errors, using selected test data.
    • The number of lines of code, using a line-counting tool on the source files.

  2. Which three types of test data should be used when testing a program?

    • Random, sorted and reversed test data that is generated by the testing software.
    • Normal, boundary and erroneous test data.
    • Valid, invalid and deleted data records taken from an old backup of the system.
    • Small, medium and large data files only, with no other size of test data.

  3. What is normal test data?

    • Typical data that the system should accept and process correctly.
    • Data chosen to be as large as the system is able to hold in its storage at once.
    • Data that lies exactly on the edge of the valid range and nowhere else at all.
    • Data that is deliberately wrong, to see how the system reacts when it goes wrong.

  4. What is boundary test data?

    • Typical values that lie somewhere in the middle of the expected range of the input.
    • Data that has been copied from the boundary of another program on the same server.
    • Data at the limits of the valid range, such as the smallest and largest permitted values.
    • Values that lie completely outside the data type of the input field in the form.

  5. What is erroneous test data?

    • Data that is valid but uncommon, which the system should accept without any difficulty at all.
    • Data that is invalid, such as the wrong type or an out-of-range value, which should be rejected.
    • The largest valid values that the program is designed to process within its limits.
    • Data that has already been checked and approved by an end user of the system.

  6. What is the purpose of acceptance testing?

    • To check the speed of the network cables that connect the computers in the office.
    • To count the number of bugs that the programmer introduced while writing the code.
    • To test the programmer's knowledge of the programming language that was used.
    • To check, with the intended users, that the solution meets its specification.

  7. Who should be involved in acceptance testing?

    • Only the marketing team who will later sell the finished product to customers.
    • The intended users of the system.
    • Only the original programmers who wrote the code in the first place for the project.
    • Only the hardware suppliers who built the computers that the system runs on.

  8. A field accepts ages from 11 to 18. Which value is a boundary test?

    • 15
    • 18
    • 30
    • abc

  9. A password field must contain 8 to 12 characters. Which test is erroneous?

    • A password with 10 characters, which lies in the middle of the range.
    • A password with 8 characters, which is the lower limit of the range.
    • A password with 12 characters, which is the upper limit of the range.
    • A password with 3 characters.

  10. A system accepts 1 to 100 items. Which value is the best boundary test?

    • 150
    • a value of text rather than a number
    • 50
    • 100

  11. A tester enters text into a numeric field. Which kind of test data is this?

    • Erroneous test data.
    • Acceptance test data, because it is provided by the end user of the system.
    • Normal test data, because users sometimes type text into numeric fields by accident.
    • Boundary test data, because text is at the edge of the numeric type range.

  12. Which test data best checks a typical everyday case?

    • Normal test data.
    • Erroneous test data, which checks that invalid input is rejected by the system.
    • Boundary test data, which checks the edges of the valid range of input values.
    • Maximum-size test data, which checks the largest data set the program can hold.

  13. A quiz app is tested with a score of 0 and then with 100 on a 100-mark quiz. Which type of test data is this?

    • Erroneous test data, because a score should never be zero or one hundred in a quiz.
    • Normal test data, because scores of zero and one hundred are typical in a quiz.
    • Random test data, because the scores are chosen at random by the tester.
    • Boundary test data.

  14. Why are erroneous tests needed?

    • To prove the system is always fast when it is given valid input from the users.
    • To confirm the system rejects or handles invalid input safely.
    • To make the test plan longer so that it looks more impressive to the funding body.
    • To remove the need for boundary testing altogether from the test plan for the project.

  15. What does a test plan record?

    • The salary of each programmer who was involved in writing the code for the project.
    • The test data, the expected results and the actual results for each test.
    • The colour scheme and font size of the interface that is being tested by the team.
    • The list of hardware suppliers that the team has used on earlier projects in the past.

  16. After acceptance testing, a user says a feature is confusing. What does this show?

    • The program has a syntax error that the compiler failed to detect during the build.
    • The test data was too normal and should be replaced with erroneous data in the plan.
    • The user has made a mistake, so the feature should be left as it is in the release.
    • The solution may not fully meet the intended users' needs, so the feature should be reviewed.

  17. Evaluate: why is testing with boundary values valuable?

    • Boundary values remove the need for normal test data in every case of the testing plan.
    • Boundary values prove the program is free of errors everywhere else in its code.
    • Boundary values are always the most common inputs that users give the system in real use.
    • Errors often occur at the limits of a range, such as off-by-one mistakes in loops and comparisons.

  18. A tester finds that the program passes normal and boundary tests but crashes on erroneous input. What should be done?

    • Add validation so that invalid data is rejected with a sensible message, then retest the program.
    • Accept that the crash cannot be fixed and leave the program in its current state.
    • Remove all the boundary tests, because they are now causing crashes in the program.
    • Stop testing, because normal and boundary tests are enough for a release of the program.

  19. Which statement about testing is correct?

    • Testing is replaced entirely by user acceptance testing in every software project.
    • Testing with enough test data proves that a program has no errors at all in its code.
    • Testing shows the presence of errors, but it cannot by itself prove that a program has no errors.
    • Testing is needed only for programs that are longer than a thousand lines of code.

  20. Why should test data be chosen as far as possible before the program is written?

    • Test data should be chosen to match exactly what the program already does, to be safe.
    • Test data cannot be chosen until the program has been compiled and run at least once.
    • Test data is only needed after the program has been delivered to the users in the field.
    • It helps define expected results from the specification, so the tests are not biased by the code.

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