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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Syntax Error
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Errors in the grammar of the programming language.
FOR without NEXT Misspelling a keyword Detected during syntax analysis |
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Logic error
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Occurs when the programmer makes a mistake in the logic of the program which means the program does not produce the right output.
Detected during black box testing |
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Run time error
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An error that occurs during the running of a program when a statement cannot run properly. It can crash the program or produce an error message.
Dividing by zero, Infinite looping, during runtime the program will crash |
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5 stages of testing
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White Box
Black Box Alpha Testing Beta Testing Acceptance Testing |
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Describe white box testing
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Testing that is done by the programmer
Tests the algorithms in the code to make sure all parts of the algorithm function as intended. Aim is to test every possible route of execution through the program |
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Describe black box testing
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Testing performed by the programmer
Using input data for which the output is known (expected output) The individual instructions of the program are not known/relevant |
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Describe alpha testing
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Done by a team of testers playing the role of the user. They work for the same company developing the software
The software may not be complete at this stage and small known bugs may still be present |
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Benefit of alpha testing
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If it is done in house they can quickly replace the version being tested and they won’t get a bad reputation for producing bad software
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Describe beta testing
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(Takes place after alpha testing is complete and any bugs have been fixed.)
A near finished version of the software is released to potential users outside the company. They test the software in the actual conditions in which it is intended to be used. |
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Acceptance testing
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After development is complete the program is tested to prove to the end user that the program works correctly and meets the original objectives.
It is done before officially handing it over / end user will pay if satisfied |
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Name 3 types of test data
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Valid
Invalid Borderline |
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Describe what is meant by invalid data
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Data which should generate an error message
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Describe what is meant by valid data
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Data you would expect a user to enter
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Describe what is meant by borderline data
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VALID DATA that is right on the boundary between valid and invalid.
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What is another name for borderline data
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Extreme data
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Name 3 debugging tools
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Translator diagnostics
Breaking points and stepping Watch Window / variable checks |
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Describe what is meant by translator diagnostics
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A translator can find errors like syntax errors OR warnings of possible logic errors.
The programmer can fix the error and then try and translate again Example: FOR without a NEXT |
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Describe how a programmer might use break points
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Break points can be added anywhere in the code by the programmer.
When the program is executed it will pause at that line and the programmer can check the values of different variables at that point in the code. |
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Describe how a programmer might use stepping
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Stepping is similar to break points but it forces the program to run one statement at a time and will then pause allowing the programmer to check the variables. Once checked the programmer can run the next statement
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Describe the purpose of watch windows
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A watch window can be used to display the values of variables and expressions as they change
The window will tell the user the value and data type of a specific variable and they can check it against the expected value. |
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Describe the steps involved in an installation routine
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Decrypts or decompresses the files if necessary
Copying the source code and compiler to the correct folder in the computer. Copying any data files required into the folder that the program expects them to be in. Copying any library files that the program uses and register them if necessary Creating icons in the program menu and desktop short cuts to make the program easily accessible Selecting and saving user settings such as preferred language |
Decrypt
copy source code Data files Library files register desktop icons language settings |
