Software testing faqs

The key words control the processing. It is also used for the visualization of data processing. The cycle is repeated unless there are no errors found. Fuzz testing is used to detect security loopholes and coding errors in software. In this technique, random data is added to the system in an attempt to crash the system. If vulnerability persists, a tool called fuzz tester is used to determine potential causes.

This technique is more useful for bigger projects but only detects a major fault. None of the characters should get truncated. Junk characters should not be added. The code coverage testing tool runs parallel while performing testing on the actual product. The code coverage tool monitors the executed statements of the source code. When the final testing is done, we get a complete report of the pending statements and also get the coverage percentage. In simple terms when a defect reaches the end customer, it is called a failure while the defect is identified internally and resolved; then it is referred to as a defect.

Black box test cases are written first as to write black box test cases; it requires project plan and requirement document all these documents are easily available at the beginning of the project. While writing white box test cases requires more architectural understanding and is not available at the start of the project. Bottom-up testing is an approach to integration testing, where the lowest level components are tested first, then used to facilitate the testing of higher level components.

The process is repeated until the component at the top of the hierarchy is tested. Breath testing is a test suite that exercises the full functionality of a product but does not test features in detail. Code Walk Through is the informal analysis of the program source code to find defects and verify coding techniques.

End-to-end testing is done after functional testing. The purpose behind doing end-to-end testing is that. A test harness is configuring a set of tools and test data to test an application in various conditions, and it involves monitoring the output with expected output for correctness. Risk-based Testing is the term used for an approach to creating a Test Strategy that is based on prioritizing tests by risk.

The basis of the approach is a detailed risk analysis and prioritizing of risks by risk level. Tests to address each risk are then specified, starting with the highest risk first. Preventative tests are designed early; reactive tests are designed after the software has been produced.

Decision table testing is used for testing systems for which the specification takes the form of rules or cause-effect combinations. In a decision table, the inputs are listed in a column, with the outputs in the same column but below the inputs. The remainder of the table explores combinations of inputs to define the outputs produced.

The techniques of equivalence partitioning and boundary value analysis are often applied to specific situations or inputs. However, if different combinations of inputs result in different actions being taken, this can be more difficult to show using equivalence partitioning and boundary value analysis, which tend to be more focused on the user interface. The other two specification-based techniques, decision tables, and state transition testing are more focused on business logic or business rules.

A decision table is a good way to deal with combinations of things e. The difference between a pilot and beta testing is that pilot testing is actually done using the product by the group of users before the final deployment, and in beta testing, we do not input real data, but it is installed at the end customer to validate if the product can be used in production. Testing technique: — Is a process for ensuring that some aspects of the application system or unit functions properly there may be few techniques but many tools.

Testing Tools: — Is a vehicle for performing a test process. The tool is a resource to the tester, but itself is insufficient to conduct testing.

Learn More About Testing Tools here. Component testing, also known as unit, module, and program testing, searches for defects in and verifies the functioning of software e. Many teams try to either strictly follow the standard testing process or completely throw it out the window instead of working it into the Agile testing lifecycle of software development process. Instead, the focus really has to change to developing the test cases and test scenarios up front , before any code is even written and to shrink the test process into a smaller iteration, just like we do when we develop software in an Agile way.

This just means that we have to chop things up into smaller pieces and have a bit of a tighter feedback loop. Instead of spending a large amount of time up front creating a testing plan for the project and intricately designing test cases, teams have to run the testing process at the feature level.

Each feature should be treated like a mini-project and should be tested by a miniature version of the testing process, which begins before any code is even written. In fact, ideally, the test cases are created before the code is written at all—or at least the test design, then the development of both the code and the test cases can happen simultaneously. Since new software is released on very short iterations, regression testing becomes more and more important, thus automated testing becomes even more critical.

In my perfect world of Agile testing, automated tests are created before the code to implement the features is actually written—truly test driven development—but, this rarely happens in reality. What about you, the software developer? What is your role in all this testing stuff? One of the big failings of software development teams is not getting developers involved enough or taking enough ownership for, testing and the quality of their own code. Instead, you should absolutely make it your responsibility to find and fix the bugs before your code goes into testing.

The reason is fairly simple. The further along in the development of software a bug is found, the more expensive it is to fix. If you test your own code thoroughly and find a bug in that code before you check it in and hand it over to QA, you can quickly fix that bug and perhaps it costs an extra hour of time. A development manager decides that the bug is severe enough for you to work on and the bug is assigned to you.

The tester goes back and checks that the bug is actually fixed and marks the defect as resolved. Ok, so by now, hopefully, you have a decent idea of what testing is, the purpose of testing, what kinds of testing can be done and your role in that whole process. Black-box testing sounds a whole lot like functional testing. Oh, and also the same question for regression testing versus automated testing.

Many of these testing terms are basically the same thing. Sometimes I feel like the whole testing profession feels the need to invent a bunch of terminology and add a bunch of complexity to something that is inherently simple. To address some of the specifics. Q 10 What is the difference between functional and nonfunctional testing? Functional testing basically deals with the functional aspect of the application.

This technique tests that the system is behaving as per the requirement and specification. These are directly linked with customer requirement. We validate the test cases against the specified requirement and make the test pass or failed accordingly. Nonfunctional testing — on the other hand, tests the Nonfunctional aspect of the application.

It tests NOT the requirement, but the environmental factors like performance, load and stress. These are not explicitly specified in the requirement but are prescribed in the quality standards. So as QA we have to make sure that these testing are also given sufficient time and priority. Q 11 What is negative testing? How is it different from positive testing? Negative testing is a technique which validates that the system behaves gracefully in case of any invalid inputs.

For example, in case the user enters any invalid data in a text box, the system should display a proper message instead of the technical message which the user does not understand.

Negative testing is different from positive testing in a way that positive testing validates that our system works as expected and compares the test results with the expected results. Most of the time scenarios for negative testing are not mentioned in the functional requirement documents. As a QA we have to identify the negative scenarios and should have provisions to test those.

Q 12 How would you ensure that your testing is complete and has good coverage? Requirement traceability matrix and Test coverage matrices will help us to determine that our test cases have good coverage. Requirement traceability matrices will help us to determine that the test conditions are enough so that all the requirements are covered. Coverage matrices will help us to determine that the test cases are enough to satisfy all the identified test conditions in RTM. Q 13 What are the different artifacts you refer when you write the test cases?

Q 14 Have you ever managed writing the test cases without having any documents? Yes, many a time we have a situation where we have to write test cases without having any concrete documents.

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Using the right software testing method.