This document provides 50 questions and answers on advanced testing techniques for the ISTQB CTAL certification. It discusses topics like conditional testing, expression testing, domain testing, perturbation testing, fault sensitivity testing, propagation oriented testing including path testing and compiler-based testing, data flow testing, and mutation testing. The full document provides detailed explanations of each testing technique.
Boundary value analysis and equivalence partitioningSneha Singh
What is Boundary value analysis and Equivalence partitioning?
Border value research and Equivalence dividing, explained with simple example:
Boundary value research and equivalence dividing both are analyze situation style techniques in black box examining.
Boundary value analysis and equivalence partitioningSneha Singh
What is Boundary value analysis and Equivalence partitioning?
Border value research and Equivalence dividing, explained with simple example:
Boundary value research and equivalence dividing both are analyze situation style techniques in black box examining.
In this Quality Assurance Training session, you will learn about Test Case Design and Technique. Topic covered in this session are:
• Test Case Design Techniques
• Black-box: Three major approaches
• Steps for drawing cause-Effect Diagram:
• Behavior Testing
• Random Testing
• White Box Techniques
• Path Testing
• Statement Coverage
• Data Flow Testing
For more information, about this quality assurance training, visit this link: https://www.mindsmapped.com/courses/quality-assurance/software-testing-training-with-hands-on-project-on-e-commerce-application/
Whitepaper Test Case Design and Testing Techniques- Factors to ConsiderRapidValue
Software testing is an essential and important technique for assessing the quality of a particular software product/service. In software testing, test cases and scenarios play an inevitable and a pivotal role. A good strategic design and technique help to improve the quality of the software testing process.
This whitepaper provides information about test case design activities, test analysis, quality risks, testing techniques, phases of test development. The paper also, explains the factors that need to be considered while choosing the right testing techniques and provides a checklist of test cases based on our rich experience of testing mobile apps.
Black box testing methods for software componentsputiadetiara
Berikut adalah penjelasan apa itu black box testing untuk software.
oleh :
Ade Tiara Putri
Program Studi S1 Sistem Informasi
Fakultas Sains dan Teknologi
Universitas Islam Negeri Sultan Syarif Kasim Riau
please visit
http://sif.uin-suska.ac.id/
http://fst.uin-suska.ac.id/
http://www.uin-suska.ac.id/
This presentation provides an overview of such basic terms as "test design" and "test cases", software design testing lifecycle and test design techniques. Next, the focus is set on four black-box techniques, namely Boundary value analysis, Equivalence partitioning, Decision tables and State transition.
This presentation by Tetiana Trushchenko (Test Engineer, Consultant, GlobalLogic), was delivered at GlobalLogic Mykolaiv QA Workshop on July 7, 2018.
As testers, we know that we can define many more test cases than we will ever have time to design, execute, and report. The key problem in testing is choosing a small, “smart” subset from the almost infinite number of tests available that will find a large percentage of the defects. Join Lee Copeland to discover how to design test cases using formal black-box techniques, including equivalence class testing, boundary value testing, decision tables, and state-transition diagrams. Explore examples of each of these techniques in action. Don’t just pick test cases at random. Rather, learn to selectively choose a set of test cases that maximizes your effectiveness and efficiency to find more defects in less time. Then, learn how to use the test results to evaluate the quality of both your products and your testing. Discover the test design techniques that will make your testing more productive.
Block-box testing (or functional testing, or behavior testing) focuses on the functional requirements of the software.
Gray box testing is a combination of white and black box testing
In this Quality Assurance Training session, you will learn about Test Case Design and Technique. Topic covered in this session are:
• Test Case Design Techniques
• Black-box: Three major approaches
• Steps for drawing cause-Effect Diagram:
• Behavior Testing
• Random Testing
• White Box Techniques
• Path Testing
• Statement Coverage
• Data Flow Testing
For more information, about this quality assurance training, visit this link: https://www.mindsmapped.com/courses/quality-assurance/software-testing-training-with-hands-on-project-on-e-commerce-application/
Whitepaper Test Case Design and Testing Techniques- Factors to ConsiderRapidValue
Software testing is an essential and important technique for assessing the quality of a particular software product/service. In software testing, test cases and scenarios play an inevitable and a pivotal role. A good strategic design and technique help to improve the quality of the software testing process.
This whitepaper provides information about test case design activities, test analysis, quality risks, testing techniques, phases of test development. The paper also, explains the factors that need to be considered while choosing the right testing techniques and provides a checklist of test cases based on our rich experience of testing mobile apps.
Black box testing methods for software componentsputiadetiara
Berikut adalah penjelasan apa itu black box testing untuk software.
oleh :
Ade Tiara Putri
Program Studi S1 Sistem Informasi
Fakultas Sains dan Teknologi
Universitas Islam Negeri Sultan Syarif Kasim Riau
please visit
http://sif.uin-suska.ac.id/
http://fst.uin-suska.ac.id/
http://www.uin-suska.ac.id/
This presentation provides an overview of such basic terms as "test design" and "test cases", software design testing lifecycle and test design techniques. Next, the focus is set on four black-box techniques, namely Boundary value analysis, Equivalence partitioning, Decision tables and State transition.
This presentation by Tetiana Trushchenko (Test Engineer, Consultant, GlobalLogic), was delivered at GlobalLogic Mykolaiv QA Workshop on July 7, 2018.
As testers, we know that we can define many more test cases than we will ever have time to design, execute, and report. The key problem in testing is choosing a small, “smart” subset from the almost infinite number of tests available that will find a large percentage of the defects. Join Lee Copeland to discover how to design test cases using formal black-box techniques, including equivalence class testing, boundary value testing, decision tables, and state-transition diagrams. Explore examples of each of these techniques in action. Don’t just pick test cases at random. Rather, learn to selectively choose a set of test cases that maximizes your effectiveness and efficiency to find more defects in less time. Then, learn how to use the test results to evaluate the quality of both your products and your testing. Discover the test design techniques that will make your testing more productive.
Block-box testing (or functional testing, or behavior testing) focuses on the functional requirements of the software.
Gray box testing is a combination of white and black box testing
In this session you will learn:
Test Case Design and Techniques
Black-box: Three major approaches
Steps for drawing cause-Effect Diagram:
Behavior Testing
Random Testing
White Box Techniques
Path Testing
Statement Coverage
Data Flow Testing
For more information: https://www.mindsmapped.com/courses/quality-assurance/qa-software-testing-training-for-beginners/
Find out more about quality assurance training and specifically about Test Case Design and Techniques. Topics covered in this session are:
Test Case Design and Techniques
Black-box: Three major approaches
Steps for drawing cause-Effect Diagram:
Behavior Testing
Random Testing
White Box Techniques
Path Testing
Statement Coverage
Data Flow Testing
For more information, visit: https://www.mindsmapped.com/courses/quality-assurance/quality-assurance-training-learn-manual-and-automation-testing/
In this quality assurance training session, you will learn Test case design. Topics covered in this course are:
• Test Case Design and Techniques
• Black-box: Three major approaches
• Steps for drawing cause-Effect Diagram:
• Behavior Testing
• Random Testing
• White Box Techniques
• Path Testing
• Statement Coverage
• Data Flow Testing
To know more, visit this link: https://www.mindsmapped.com/courses/quality-assurance/software-testing-quality-assurance-qa-training-with-hands-on-exercises/
In this quality assurance training, you will learn Test Case Design and Technique. Topics covered in this session are:
• Test Case Design and Techniques
• Black-box: Three major approaches
• Steps for drawing cause-Effect Diagram:
• Behavior Testing
• Random Testing
• White Box Techniques
• Path Testing
• Statement Coverage
• Data Flow Testing
For more information, visit this link: https://www.mindsmapped.com/courses/quality-assurance/software-testing-training-beginners-and-intermediate-level/
In this session you will learn:
Test Case Design and Techniques
Black-box: Three major approaches
Steps for drawing cause-Effect Diagram:
Behavior Testing
Random Testing
White Box Techniques
Path Testing
Statement Coverage
Data Flow Testing
For more information, click here:
https://www.mindsmapped.com/courses/quality-assurance/software-testing-tutorial/
Abstract—Combinatorial testing (also called interaction testing) is an effective specification-based test input generation technique. By now most of research work in combinatorial testing aims to propose novel approaches trying to generate test suites with minimum size that still cover all the pairwise, triple, or n-way combinations of factors. Since the difficulty of solving this problem is demonstrated to be NP-hard, existing approaches have been designed to generate optimal or near optimal combinatorial test suites in polynomial time. In this paper, we try to apply particle swarm optimization (PSO), a kind of meta-heuristic search technique, to pairwise testing (i.e. a special case of combinatorial testing aiming to cover all the pairwise combinations). To systematically build pairwise test suites, we propose two different PSO based algorithms. One algorithm is based on one-test-at-a-time strategy and the other is based on IPO-like strategy. In these two different algorithms, we use PSO to complete the construction of a single test. To successfully apply PSO to cover more uncovered pairwise combinations in this construction process, we provide a detailed description on how to formulate the search space, define the fitness function and set some heuristic settings. To verify the effectiveness of our approach, we implement these algorithms and choose some typical inputs. In our empirical study, we analyze the impact factors of our approach and compare our approach to other well-known approaches. Final empirical results show the effectiveness and efficiency of our approach.
Problem Statement:One of the common concerns from the customers is that how to effectively optimize the testing given the
multiple integration points in a distributed/composite system environments, which does expose at least the below
pain points:
1. Avoid Exhausted testing
2. Meet all the boundary conditions
3. Limited time to execute 100% test execution
4. Include all the critical business functions
5. Efficient Regression Testing
and the list goes on...
Resolution: The solution is detailed in the attachment and have effectively implemented in various client places.
Configuration Navigation Analysis Model for Regression Test Case Prioritizationijsrd.com
Regression testing has been receiving increasing attention nowadays. Numerous regression testing strategies have been proposed. Most of them take into account various metrics like cost as well as the ability to find faults quickly thereby saving overall testing time. In this paper, a new model called the Configuration Navigation Analysis Model is proposed which tries to consider all stakeholders and various testing aspects while prioritizing regression test cases.
Unit 3 Control Flow Testing contains Concept of CFT, Generate Test Input Data, Activities of Generating Test Input Data, Control Flow Graph, Path Selection Criteria, Techniques for Path Selection statement wise, branch wise, predicate wise etc. and Generating Test Input.
Let us delve upon the various skill levels or knowledge levels for the testing industry being designated as K-Levels.
What are K-Levels of knowledge?
K-Levels or “Knowledge Levels” basically refers to the prescription of an upper limit of skills or knowledge essential for a particular certification.
Hierarchy of K-Levels is described in globally recognized Bloom’s Texonomy of learning. Reaching a particular K-Level means that the individual has successfully achieved some measurable & meaningful objectives.
Enhancing Performance with Globus and the Science DMZGlobus
ESnet has led the way in helping national facilities—and many other institutions in the research community—configure Science DMZs and troubleshoot network issues to maximize data transfer performance. In this talk we will present a summary of approaches and tips for getting the most out of your network infrastructure using Globus Connect Server.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Pushing the limits of ePRTC: 100ns holdover for 100 daysAdtran
At WSTS 2024, Alon Stern explored the topic of parametric holdover and explained how recent research findings can be implemented in real-world PNT networks to achieve 100 nanoseconds of accuracy for up to 100 days.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
PHP Frameworks: I want to break free (IPC Berlin 2024)
ISTQB Advanced Study Guide - 5
1. ISTQB Advanced Level Certification – Study Guide (Part 5)
Prior to appearing for exam for ISTQB Advanced Level certification, it is wise to quickly brush up
your knowledge by reviewing the following questions – answers that are extremely important from
the examination point of view.
Q. 41: What is Conditional testing?
In conditional testing, each clause in every condition is forced to take on each of its possible
values in combination with those of other clauses. Conditional testing thus subsumes branch
testing. Instrumentation for conditional testing can be accomplished by breaking compound
conditional statements into simple conditions and nesting the resulting if statements. This
reduces the problem of conditional coverage to the simpler problem of branch coverage, enabling
algorithms from the control flow view to be employed.
<<<<<< =================== >>>>>>
Q. 42: What is Expression testing?
Expression testing requires that every expression assume a variety of values during a test in
such a way that no expression can be replaced by a simpler expression. Expression testing
requires significant runtime support for the instrumentation.
<<<<<< =================== >>>>>>
Q. 43: What is Domain testing?
The input domain of a program can be partitioned according to which inputs cause each path to
be executed. These partitions are called path domains. Faults that cause an input to be
associated with the wrong path domain are called domain faults. Other faults are called
computation faults. The goal of domain testing is to discover domain faults by ensuring that test
data limit the range of undetected faults. This is accomplished by selecting inputs close to
boundaries of the path domain. If the boundary is incorrect, these points increase the chance of
an infection’s occurring. Domain testing assumes coincidental correctness does not occur, i.e., it
assumes a program will fail if an input follows the wrong path.
<<<<<< =================== >>>>>>
Q. 44: What is Perturbation testing?
Perturbation testing attempts to determine a sufficient set of paths to test for various faults in the
code. Faults are modeled as a vector space, and characterization theorems describe when
sufficient paths have been tested to discover both computation and domain errors. Additional
paths need not be tested if they can not reduce the dimensionality of the error space.
<<<<<< =================== >>>>>>
Q. 45: What is Fault sensitivity testing?
Foster describes a method for selecting test data that are sensitive to faults. Howden has
formalized this approach in a method called weak mutation testing. Rules for recognizing fault-
sensitive data are described for each primitive language construct. Satisfaction of a rule for a
given construct during testing means that all alternate forms of that construct have been
distinguished. This has an obvious advantage over mutation testing - elimination of all mutants
without generating a single one! Some rules even allow for infinitely many mutants.
2. <<<<<< =================== >>>>>>
Q. 46: What is Propagation oriented testing?
A testing technique is considered propagation oriented if it seeks to ensure that potential
infections propagate to failures. This requires selecting paths to test based on their propagation
characteristics.
Following are the types of propagation oriented testing:
1) Path testing
2) Compiler-based testing
3) Data flow testing
4) Mutation testing
<<<<<< =================== >>>>>>
Q. 47: What is Path testing?
In path testing, data are selected to ensure that all paths of the program have been executed. In
practice, of course, such coverage is impossible to achieve, for a variety of reasons. First, any
program with an indefinite loop contains infinitely many paths, one for each iteration of the loop.
Thus, no finite set of data will execute all paths. The second difficulty is the infeasible path
problem: it is undecidable whether an arbitrary path in an arbitrary program is executable.
Attempting to generate data for such infeasible paths is futile, but it cannot be avoided. Third, it is
undecidable whether an arbitrary program will halt for an arbitrary input. It is therefore impossible
to decide whether a path is finite for a given input.
In response to these difficulties, several simplifying approaches have been proposed. Infinitely
many paths can be partitioned into a finite set of equivalence classes based on characteristics of
the loops. Boundary and interior testing requires executing loops zero times, one time, and, if
possible, the maximum number of times. Linear sequence code and jump criteria specify a
hierarchy of successively more complex path coverages.
Path coverage does not imply condition coverage or expression coverage, since an expression
may appear on multiple paths but some subexpressions may never assume more than one value.
<<<<<< =================== >>>>>>
Q. 48: What is Compiler-based testing?
In a compiler based testing input-output pairs are encoded as a comment in a procedure, as a
partial specification of the function to be computed by that procedure. The procedure is then
executed for each of the input values and checked for the output values. The test is considered
adequate only if each computational or logical expression in the procedure is determined by the
test; i.e., no expression can be replaced by a simpler expression and still pass the test.
Simpler is defined in a way that allows only finitely many substitutions. Thus, as the procedure is
executed, each possible substitution is evaluated on the data state presented to the expression.
Those that do not evaluate the same as the original expression are rejected. Substitutions that
evaluate the same, but ultimately produce failures, are likewise rejected.
<<<<<< =================== >>>>>>
Q. 49: What is Data Flow Testing?
3. Data flow analysis can form the basis for testing exploiting the relationship between points where
variables are defined and points where they are used. By insisting on the coverage of various
definition-use pairs, data flow testing establishes some of the conditions necessary for infection
and partial propagation. The motivation behind data flow testing is that test data are inadequate if
they do not exercise these various definitions use combinations. It is clear that an incorrect
definition that is never used during a test will not be caught by that test. Similarly, if a given
location incorrectly uses a particular definition, but that combination is never tried during a test,
the fault will not be detected.
Data flow connections may be determined statically or dynamically. Some connections may be
infeasible due to the presence of infeasible subpaths. Heuristics may be developed for generating
test data based on data flow information.
<<<<<< =================== >>>>>>
Q. 50: What is Mutation testing?
Mutation testing uses mutation analysis to judge the adequacy of test data. The test data are
judged adequate only if each mutant is either functionally equivalent to the original program or
computes output different from the original program on the test data. Inadequacy of the test data
implies that certain faults can be introduced into the code and go undetected by the test data.
Mutation testing is based on two hypotheses. The competent programmer hypothesis says
that a competent programmer will write code that is close to being correct; the correct
program, if not the current one, can be produced by some straightforward syntactic changes
to the code. The coupling effect hypothesis says that test data that reveal simple faults will
uncover complex faults. Thus, only single mutants need be eliminated, and combinatoric
effects of multiple mutants need not be considered. Gourlay characterizes the competent
programmer hypothesis as a function of the probability of the test set’s being reliable and
shows that under this characterization, the hypothesis does not hold. Empirical justification of
the coupling effect has been attempted, but theoretical analysis has shown that it may hold
probabilistically, but not universally.
Read More articles on ISTQB CTAL Advanced Level Certifications at
http://www.softwaretestinggenius.com/categoryDetail.php?catId=166