<< Chapter < Page
  Software engineering     Page 11 / 15
Chapter >> Page >

Data flow-based criteria

In data-flow-based testing, the control flowgraph is annotated with information about how the program variables are defined, used, and killed (undefined). The strongest criterion, all definition-use paths, requires that, for each variable, every control flow path segment from a definition of that variable to a use of that definition is executed. In order to reduce the number of paths required, weaker strategies such as all-definitions and all-uses are employed.

Reference models for code-based testing

Although not a technique in itself, the control structure of a program is graphically represented using a flowgraph in code-based testing techniques. A flowgraph is a directed graph the nodes and arcs of which correspond to program elements. For instance, nodes may represent statements or uninterrupted sequences of statements, and arcs the transfer of control between nodes.

Fault-based techniques

With different degrees of formalization, fault-based testing techniques devise test cases specifically aimed at revealing categories of likely or predefined faults.

Error guessing

In error guessing, test cases are specifically designed by software engineers trying to figure out the most plausible faults in a given program. A good source of information is the history of faults discovered in earlier projects, as well as the software engineer’s expertise.

Mutation testing

A mutant is a slightly modified version of the program under test, differing from it by a small, syntactic change. Every test case exercises both the original and all generated mutants: if a test case is successful in identifying the difference between the program and a mutant, the latter is said to be “killed.” Originally conceived as a technique to evaluate a test set, mutation testing is also a testing criterion in itself: either tests are randomly generated until enough mutants have been killed, or tests are specifically designed to kill surviving mutants. In the latter case, mutation testing can also be categorized as a code-based technique. The underlying assumption of mutation testing, the coupling effect, is that by looking for simple syntactic faults, more complex but real faults will be found. For the technique to be effective, a large number of mutants must be automatically derived in a systematic way.

Usage-based techniques

Operational profile

In testing for reliability evaluation, the test environment must reproduce the operational environment of the software as closely as possible. The idea is to infer, from the observed test results, the future reliability of the software when in actual use. To do this, inputs are assigned a probability distribution, or profile, according to their occurrence in actual operation.

Software reliability engineered testing

Software Reliability Engineered Testing (SRET) is a testing method encompassing the whole development process, whereby testing is “designed and guided by reliability objectives and expected relative usage and criticality of different functions in the field.”

Questions & Answers

how to start making a software?
Jerry Reply
books or teacher
Louis
both of
Hemant
both
ben
i prefer books and a reference teacher on side im self taught self learn everything
Louis
time is your best friend
Louis
I want learn more as well
Ogunrinde
well honestly it would be too large to explain everything in chat but, pick the programming language of choice your most comfortable with, learn that language, make it yours, use it as a primary language to learn in parallel any other language of object oriented programming,
Louis
also it wouldn't hurt to have a basic background in math
Louis
but be a scientist behind the machine(Computer)
Louis
have math be your way of translation of human to computer interaction because you can solve any problem in the universe with mathematics
Louis
good to know discrete topics embedded systems, electrical engineering
Louis
doesn't hurt to have a buddy to team up on project while your asleep to keep progressing
Louis
(Important!..) have real data to work on, the reason is because there have to be some goal to be achieved at some point.
Louis
Be alittle greedy to learn any and all about any language you use.
Louis
Another important thing is not to rush through learning
Louis
once you learn a concept try teaching the concept to someone else who is as interested as you are, that way. the concept will be stuck concretely in your mind.
Louis
slow but sure please guys.education is not like food.
Emmanuel
if you like graphics and games you can use a language that have graphics libraries such as C++, Python, or Java as an example
Louis
who can tell Why software is more important in computer science
Emmanuel
don't just learn alittle want the whole thing and want to know everything at your finger tips
Louis
grasp
Louis
because the hardware and software is useful depends on how useful your goal is
Louis
graphics is not about database management system.c++ is about programming.
Emmanuel
be an android who's drug is "addicted to information" related to the field.
Louis
and in need of the most complex algorithm update
Louis
learn console applications
Louis
how does your languge relate to databases
Louis
and web programming
Louis
i know just throwing some things your way to open mind
Louis
im certi at c++
Louis
it is a general programming language used to build many infrastructure
Louis
including database web and many other soft ware frameworks
Louis
excellent
Ogunrinde
Thanks
Louis
Suppose we are faced with developing a system that we expect to have 100000LOC. Compute the effort and the effort development time for each of the three development modes i.e. Organic, semi - detached and embedded .
yukta Reply
c++ or python or java
Louis
Discuss multi threading as used in windows, Linux and Unix
James Reply
what is software ?
Chirag Reply
Software is a general term for the various kinds of programs used to operate computers and related devices...
amjad
what is ergonomics.
amjad
er·go·nom·ics ˌərɡəˈnämiks/ noun the study of people's efficiency in their working environment
Louis
what is software integration?how can you integrate two different softwares with one single module?
strings Reply
Either type casting or template rogramming through STL
Louis
use c++
Louis
what is the STL?
abdo
STANDARD TEMPLATE LIBRARY
Louis
thanks louis
abdo
your welcome my friend
Louis
I have another question guy's.What's the HTML?
Zuheyp Reply
An HTML is  a standardized system for tagging text files to achieve font, colour, graphic, and hyperlink effects on World Wide Web pages.
Hemant
it is also a computer language devised to allow website creation
Hemant
you're clever Man
Zuheyp
i have a c++ question
Louis
C++ is a general-purpose, case-sensitive, free-form programming language that supports procedural, object-oriented, and generic programming. C++ is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features. C++ was deve
Zuheyp
what's the relationship Design Define Debug Development Development
Zuheyp Reply
sorry question is confusing
Louis
ok
Zuheyp
Define attached Design attached Development attached Debug attached Deployment attached Define
Zuheyp
Attach and deploy components to environments instead of directly to an Atom. Components can be attached and deployed to different environments with unique build versions and can include different deploy-time settings.
Hemant
is it same?
Zuheyp
and debug:If your app is already running on your device, you can start debugging without restarting 
Hemant
yeah that's cool
Zuheyp
Am mean that's right
Zuheyp
and select the debug target
Hemant
What is C language?
Bashir Reply
short note on software engineering
prachi Reply
am interested
marvellous
Explain human computer interaction
amjad
AI
Louis
Human computer interaction is the study of how people interact with computers and to what extent computers are or are not developed for successful interaction with human beings. 
Hemant
human needs for the computer[stated]
Louis
AI=Artificial Intelligence
Louis
all explained abstractingly
Louis
Please give me a Standard definition of the word *software*
marvellous
collection of program is called software
Hemant
what is sowftware?
rana Reply
please correct the spellings of software
majid
kk
Amissah
soft ware is the Application of principles used in field of engineering
Zuheyp
how do you compare c++ concepts with unity and directx pipeline
Louis
software is a collection of program.
Hemant
software engineering eligiblelity criteria for DAE civil students?
Engr Reply
what is software?
Abdullahi Reply
software means instructions or data that enable computers to work
majid
hi
Abdullahi
majid
Abdullahi
yes abdullahi
majid
how you
Abdullahi
i want to be software engineer ing
Abdullahi
I am fine
majid
software is a collection of program
Hemant
I want to learn software engineering what should I do
Emmanuel
googles your best friend, amazon books, barnes and noble etc..
Louis
software is the set of computer programs executing on computer ; they're made of instructions know as Algorithm. an Algorithm is a sequence of instructions designed to solve a particular problem. Software is all virtual parts of the computer ; computer programs. Software must be well designed.
Manuel
Emmanuel Adebayor. you need to investigate what university has a good level at teaching, this is the most important thing at University to become one the best professional software engineer on earth. You can either get information from public universities or consulting in particular Univesities
Manuel
I'm a software engineer student and I can tell you , you can learn a lot of interesting things about the career, I'm sure you won't regret it.
Manuel
What is design pattern in software engineering? Explain briefly...
amjad
thanks to allow
Hemant
what are the good books to read as a beginner of software engineer.
ben
hi everyone, I'm so happy that I found myself in the mist of knowledgeable people right here, I know that by following this conversation, and by putting it into practice I will an expert in software engineering
Ogunrinde
hi! how to start making a software?
Jerry
can i get more information about data structured centered design
Samir Reply
what is best course to get job
Eswar Reply
engineering
Abdullahi
Why do most computer sciences emphasize the technical foundations of software development?
Profneil Reply

Get the best Software engineering course in your pocket!





Source:  OpenStax, Software engineering. OpenStax CNX. Jul 29, 2009 Download for free at http://cnx.org/content/col10790/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Software engineering' conversation and receive update notifications?

Ask