SDD - Testing

Question 1

What does Reliable, Robust, and Portable mean in computing

Answer 1

• Reliable
  – produces the correct output from the input
• Robust
  – Copes with the invalid data
  – Deals with unexpected conditions
• Portable
  – Runs on different platforms such as Linux, windows, osx, etc

Question 2

What are the 3 aspects of testing

Answer 2

Pierce slapped childish_gambino

Plan
Systematic
Comprehensive

Question 3

What is the purpose of testing

Answer 3

• Is it fit for purpose does it meet the specification?
• Is it robust?
• Is it reliable?

Question 4

What is the purpose of the 3 testing aspects?

Answer 4

• Plan
  – What is it that we want to test?
  e.g. functions, data, and outputs
• Systematic
  – Testing as many conditions that are possible
• Comprehensive
  – One way is to ensure that you use a wide range of test data.
  – Modules can be tested individually
  – Modules can also be tested to see if they integrate well

Question 5

What are the test data types?

Answer 5

Normal, Extreme, and Exceptional.

• Normal
  – This is data that the program should be expected to use in normal operation
• Extreme
  – This type of data is at the edge of what’s acceptable e.g. high and low limits as well as boundaries
• Exceptional
  – This type of data is invalid. Robust programs should reject this.

Question 6

What is a testing table?

Answer 6

Shows some inputs, the expected output, and the received/actual output as well as a comment on each output.

Question 7

Phases of testing Alpha and Beta
What are the differences?

Answer 7

• Alpha Testing
  – Internal testing
  – Pre-release
  – Done by the development team
• Beta Testing
  – Testing a program in working conditions
  – Done by members of the public or an independent test group
  – Feedback to the development team

Question 8

What is in a test plan

Answer 8

• What is the use of a test plan
• A test plan ensures that all functional requirements of the program are tested.

*What are your test cases
- A test case is going to be under the user interaction with your system.

*What test data are you going to use?
- What data will you use in your system to ensure that your tests are valid.

Question 9

What are the Debugging Techniques?

Answer 9

• Dry Runs
• This is when you manually go through each line of code one by one, without executing the program.
• This is used when to find logic errors and to aid in making a trace table
• Trace tables
• A trace table includes multiple columns, the line number, and then the name of all the variables in the program.
• Breakpoints
• Breakpoints are used to stop the execution at specified lines. This is mainly used in more serious software.
• This is used when a select code is being tested to see if its input gives out the intended output
• Watchpoints
  Watchpoints are similar to breakpoints but their assigned variables

Watchpoints stop the execution of a program once the contents of a specific variable/s meet a particular condition/s