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FAULT ATTACK TESTING

EXPERIENCE BASED TESTING TECHNIQUE

The fault attack testing is a type of experience based testing technique. The experience based techniques are based on the experiences of software testers in development and analysis. There are various types of experience based techniques. They are: Error guessing, checklist based, exploratory testing and fault attack testing.

Error guessing technique:

In the error guessing technique, the errors which can occur are guessed. The tester guesses the errors which might be introduced during the development of the software.

Checklist based testing:

In checklist based testing, the tester uses the checklist as a guide which reminds him the areas of the application to be tested.

Exploratory Testing:

In this testing, the tester plans and designs what to be tested next while execution of the software.

Fault Attack Testing:

The software crashes are focused on trying to involve some failures. The attack will mainly focus on user interface, operating system, and interfacing system, database API’s. Eg: Data exchanges can tend to a failure. The fault attack in software is a technique for improving the total area of the complete test by introducing faults in to the software to test the decisions. During the execution of a code the fault may cause an error which is called as invalid state in its system boundary. Here each new error in the system boundary acts as a fault. There are two types of fault injection.

  • Compile time injection
  • Run time fault injection

Compile-time injection: 

In Compile-time injection technique, the source code is altered to inject simulated faults. One of the method which follows this procedure is called as mutation testing which completely changes the lines of code which contains the faults. An example the technique could be changing b = b + 1 to b = b – 1. The refinement of code mutation is code insertion fault injection which adds code apart from modifying it.

Run-time Fault Injection: 

In the run time fault injection, the software is triggered to inject the fault into the running software. There are many numbers of method via in which the fault is injected and that is through numerous physical methods and different triggers like: Time based triggers and interrupt based triggers.

There are different ways to introduce the faults in the system through triggers they are:

  • Corruption of memory space: This technique corrupts the RAM, processors and registers.
  • System interposition techniques: This is used in the fault propagation from operating system and kernel interfaces etc
  • Network level injection: This type of technique is known to the corruption, loss and re-organizing the network packets in the network areas.

Generally fault is a state of software caused by an error. It is a condition which makes the software to fail to perform its requirements.

Check your Understanding:

  1. What is Fault and Defect?
  2. What are the techniques used in introducing the fault?
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38 thoughts on “FAULT ATTACK TESTING”

  1. What are Fault and Defect?
    Defect: It can be simply defined as a variance between expected and actual. A defect is an error found AFTER the application goes into production.
    Fault: It’s a programming mistake. A false, wrong step, process or data definition in a software product.

    What are the techniques used in introducing the fault?
    Error guessing, checklist-based, exploratory testing and fault attack testing.

  2. Fault: It is a state of software caused by an error. It is a condition which makes the software to fail to perform its requirements. It is a synonym of bug. The bug usually refers to fault in the development environment.
    Defect: Defect refers to the fault in test environment. It occurs when the behavior of the software developed by developer is not same as the expectation of the client.
    Techniques used in introducing the fault:
    1. Compile time injection: The source code is altered to inject simulated faults. The method which follows this procedure is called mutation testing. Completely changes the lines of code which contains the faults.
    eg: changing b=b+1 to b=b-1.
    2. Run time fault injection: Here, the software is triggered to inject the faults into the running software. There are numerous physical methods to inject the faults and different triggers like :
    – Time based triggers
    – Interrupt based triggers

    Defect: Defect is a result of error.

  3. 1. Fault is the state of the software which occurs when an error is injected in the software.
    Defect is the error that is found in the software while testing and needs to be fixed.
    2. Some techniques used to introduce a fault are:
    Corruption of memory space, System Interposition, Network level injection.

  4. Fault is the mistake in the code which leads to defect in the software.

    Fault Attack testing is the technique used in introducing the fault.

  5. Fault is the condition which makes the software to fail from performing the requirements and is generally caused by an error in the software whereas defect is an error found by the tester which is made by the developer in coding. Faults can be introduced in compile time or run time errors by various techniques like Corruption of memory space ,System interposition techniques,Network level injection.

  6. 1)Fault is a state which caused improper running of a software. The result is it causes failure to perform its requirements.Defect is the cause of faults in the system.
    2)Error guessing
    Check list based technique
    Exploratory testing
    Fault attack testing

  7. 1.Fault: An incorrect step, process, or data definition in a computer program.
    Defect:- A error found by a tester is known as defect.

    2.The different techniques for introducing the fault are:
    a)Corruption of memory space: This technique corrupts the RAM, processors and registers.
    b) System interposition techniques: This is used in the fault propagation from operating system and kernel interfaces etc
    c)Network level injection: This type of technique is known to the corruption, loss and re-organizing the network packets in the
    network areas.

  8. FAULT ATTACK TESTING
    1. Fault causes the software to fail, defect is when the program is already out to customers.
    2. Techniques used: error guessing, exploratory, checklist based, and fault attack testing.

  9. Fault is the result of an error which makes the software fail to perform properly whereas defect makes the software give different results rather than expected.

    Techniques used: error guessing, exploratory, checklist based, and fault attack testing.

  10. This article throws light on different types of experience based testing techniques: Error guessing, checklist based, exploratory testing and fault attack testing. It furthur explains the types under fault attack testing: Compile time injection and Run time fault injection.

  11. 1) fault is an error which makes system fail. and defect is result of fault.
    2)error guessing techniques,exploratory testing,run time

  12. 1. Fault is an incorrect process or error in the code and defect is a condition where software does not meet the requirements.
    2. TEchniques used in introducing faults are: corruption of the memory space, System interposition and network level injections.

  13. A defect is an error or a bug, in the application which is created. A programmer while designing and building the software can make mistakes or error. These mistakes or errors mean that there are flaws in the software. These are called defects.
    Fault: An incorrect step, process, or data definition in a computer program which causes the program to perform in an unintended or unanticipated manner.
    The techniques used in introducing the fault are:
    1. Error guessing technique
    2. checklist based techniques
    3. Exploratory testing techniques
    4. Fault attack testing techniques.
    4a. compile time injection
    4b. Run time fault injection

  14. Fault is the mistake that has done during the software development process by software programmer which has not fill-full the client requirement or any technical issue in the software. QA tester can test these type of error by testing the software.
    Fault Attack Testing: This kind of testing depends on software tester’s experience. There are two type of testing.
    1: Checklist based testing: This kind of testing guess during the development of the software.
    2: Error base testing : In this testing tester has a checklist that reminds tester that which testing has done or not.

  15. Fault: Fault is an incorrect step, process, or data definition in a computer program. It is a condition that causes the software to fail to perform its required function.
    Defect: A defect is introduced into the software as the result of an error.

    Techniques used in introducing the fault:
    1. Compile-time injection: When faults are introduced directly into the code.
    2. Run time fault injection: When faults are introduced through the use of software triggers that cause specific scenarios to occur in a running system.
    There are different ways to introduce the faults in the system through triggers they are:
    — Corruption of memory space: This technique corrupts the RAM, processors and registers.
    — System interposition techniques: This is used in the fault propagation from operating system and kernel interfaces etc
    — Network level injection: This type of technique is known to the corruption, loss and re-organizing the network packets in the network areas.

  16. 1. A Defect is when something is not working the way that it was intended to whereas a Fault is when something is not working correctly at all.
    2. There are a couple different techniques that are used in order to introduce a fault and those are the following: Compile-Time Injection and Run-Time Fault Injection.

  17. Fault An incorrect step, process, or data definition in a computer program which causes the program to perform in an unintended or unanticipated manner.
    Defect is an error or bug which is created during the designing and building phase of the software.

  18. Fault: It is a condition that causes the software to fail to perform its required function.
    A mistake in coding is called Error, error found by tester is called Defect.

    There are two types of fault injection.
    • Compile time injection: It is a fault injection technique where source code is modified to inject
    simulated faults into a system.
    • Run time fault injection: It makes use of software trigger to inject a fault into a software system
    during run time. The Trigger can be of two types, Time Based triggers
    and Interrupt Based Triggers.

  19. Error: Any incorrect human action that causes a problem in the system is called Error
    Defect: is an error found by the tester during the process.

    2. Techniques used in Fault attack testing:
    Compile time injection
    Run time fault injection

  20. Fault is a mistake that is willingly injected or introduce in a software to test the behavior. It helps determine a system capacity or boundaries because it will generate errors that will be considered invalid. Unlike Fault, defects are found in a software during testing and are not expected but also helps improve the software.
    Two techniques are used to inject fault, such as Compile Time Injection which involved the alteration of a source code to inject simulated faults, whereas the Run Time Fault is referring to the injection of fault in the running software.

  21. What is Fault and Defect?
    Fault is the mistake in coding of the software done by developer during development process
    defect is in the sense software not working as per requirement of the client and is tested by QA .

    What are the techniques used in introducing the fault?
    he fault attack testing is a type of experience based testing technique. The experience based techniques are based on the experiences of software testers in development and analysis. There are various types of experience based techniques. They are: Error guessing, checklist based, exploratory testing and fault attack testing.

  22. Fault:It is the one in which software is fail in the requirement caused by an error.
    Defects: it is one of the condition in software between actual result and expectation.It is a result of an error.
    There are two techniques used in introduction of faults are:
    compile time injection and run time injection.

  23. Fault: is an error made which leads to the improper functioning of a software.
    Defect: is the unexpected result by the software which is the product of fault.

    The techniques used in introducing the fault are: compile-time injection, and run-time fault injection.

  24. 1. A defect is an error or a bug in the application which is created. Errors or mistakes made by developers when designing/building software which means that there are flaws in the software. These are called defect. Defects can be called different names by different companies like bug, issue, incident or problem. Fault is a state of software caused by an error. It is a condition which makes the software to fail to perform its requirements.

    2. The two techniques are Compile time injection and Run time fault injection.

  25. FAULT: Fault is a state of software caused by an error. It is a condition which makes the software to fail to perform its requirements.
    DEFAULT:Defect is any variance between actual and expected results.
    The techniques used in introducing the fault:
    Compile time injection: The source code is altered to inject simulated faults
    Run time fault injection: ,The software is triggered to inject the fault into the running software

  26. Fault: Fault is an incorrect step, process, or data definition in a computer program. It is a condition that causes the software to fail to perform its required function.
    Defect:- Defect is the result of error. If the behavior of actual software developed by the developer is not same as expected.
    The techniques used in introducing the fault are:
    fault attack testing:
    The fault attack in software is a technique for improving the total area of the complete test by introducing faults in to the software to test the decisions. During the execution of a code the fault may cause an error which is called as invalid state in its system boundary. Here each new error in the system boundary acts as a fault. There are two types of fault injection:
    Compile time injection and Run time fault injection.

  27. 1.Fault: An incorrect step, process, or data definition in a computer program. Generally fault is a state of software caused by an error. It is a condition which makes the software to fail to perform its requirements.
    2. Defect:- A error found by a tester is known as defect.

    2.The different techniques for introducing the fault are:
    a)Corruption of memory space: This technique corrupts the RAM, processors and registers.
    b) System interposition techniques: This is used in the fault propagation from operating system and kernel interfaces etc
    c)Network level injection: This type of technique is known to the corruption, loss and re-organizing the network packets in the
    network areas.

  28. Fault is a state of software caused by an error .It is a condition which makes the software to fail to perform its requirements.
    Defects are the fault in the test environments . They are errors found by the tester . Defects occur when the behavior of the software developed is not as expected by the client requirement.
    The different ways to introduce the faults in the system are corruption of memory space ,system interposition techniques and network level injection.

  29. fault causes the software to fail were as, defect happens at the last process.
    the techniques used introducing the faults are compile time injection and run time fault injection.

  30. 1. Fault is the state of the software which occurs when an error is injected in the software.
    Defect is the error that is found in the software while testing and needs to be fixed.
    2. Some techniques used to introduce a fault are:
    Corruption of memory space, System Interposition, Network level injection.

  31. 1. Fault: Fault is a condition caused by the errors in the software which make it fail to perform its required functions.
    Defect: defect is referred to the difference between actual output and expected output.
    2. There are two types of fault injection methods:
    a. Compile time injection:
    In this method the source code is changed/altered to inject the faults in to the program.
    b. Run time fault injection:
    In this method the software is prompted to inject the fault in to running software.

  32. A Defect is something that makes the software nonfunctional because of mistakes in the development of the software, which could include bad planning and design, in development. A fault is something that takes place when a mistake is deliberately injected in the software, at various locations and time points causing the software to become nonfunctional, or even insecure.

    Faults can be injected variously. It could be at compile time in the source code. That is called compile time injection. Run time injection occurs when a fault is injected while executing the software program. It can happen by corrupting the memory space, or by a system interposition technique where faults are propagated by the operating system, kernel interfaces etc. It can also happen in network places by creating corruption, loss, and reorganization in network packets.

  33. Fault is a technique used for improvement. It is used to cause a system fail to see if the software is doing what it is suppose to be doing during the situation.
    Compile time injection
    Run time fault injection

  34. Fault testing is experience-based testing. This testing is done to improve the quality of the software.
    Various techniques
    compile time injection
    run time injection
    these methods are used to check how the application handles without system crashing

  35. 1)Fault: Fault is a state of software caused by an error. It is a condition which makes the software to fail to perform its requirements.
    Defect :A defect is an error or a bug, in the application which is created. A programmer while designing and building the software can make mistakes or error. These mistakes or errors mean that there are flaws in the software. These are called defects.

    2)The technique used in introduction of fault are:
    Compile time injection
    Run time fault injection

  36. 1. A Defect is when something is not working the way that it was intended to whereas a Fault is when something is not working correctly at all.
    2. There are a couple different techniques that are used in order to introduce a fault and those are the following: Compile-Time Injection and Run-Time Fault Injection.

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