Exam (elaborations)
ISTQB EXAM 1 QUESTIONS AND ANSWERS GRADED A+
- Course
- Institution
Exam of 8 pages for the course ISTQB at ISTQB (ISTQB EXAM 1)
[Show more]
Content preview
ISTQB EXAM 1Describe with examples the way in which a defect in software can cause harm to a
person, the environment or a company. - answerloss of money, time, business
reputation; even injury or death
Distinguish between the root cause of a defect and its effects - answer humans can
make errors that produce defects because there is time pressure, complex code,
complexity of infrastructure, changing technologies, and/ or many system interactions
if a defect is executed, system may fail to do what it should do (or do something it
shouldn't), causing a failure. not all defects result in failure. failures may also be caused
by environmental conditions such as radiation, magnetism, electronic fields, and
pollution (causing faults in firmware or changing hardware conditions)
Give reasons why testing is necessary by giving examples - answerreduces risk of
problems occurring during operation and contribute to quality of software system if
defects found are corrected before release; also may be required to meet contractual /
legal requirements or industry specific standards
Describe why testing is part of quality assurance and give examples of how testing
contributes to higher quality - answerwith testing, it's possible to measure quality in
terms of defects found for both functional and non-functional software requirements and
characteristics (reliability, usability, efficiency, maintainability, portability). it gives
confidence in quality if it finds few/ no defects. when testing finds defects, quality
increases when defects are fixed. processes can be improved by understanding root
causes of defects in other projects, thus preventing reoccurring defects and improving
quality of future systems
Recall common objectives of testing - answerfinding defects, gaining confidence about
quality level, providing info for decision making, preventing defects
Objectives of dev testing - answercause as many failures as possible so defects in
software are identified / can be fixed
Objectives of acceptance testing - answerconfirm system works as expected to gain
confidence that it has met requirements; assess quality to give info to stakeholders of
the risk of releasing it
Objectives of maintenance - answertesting that no new defects have been introduced
during dev of changes
, Objectives of operational - answerassess system characteristics such as reliability or
availability
debugging - answerdev activity that finds, analyzes, removes the cause of failure
testing - answershows failures caused by defects & ensures fixes resolves failure
testing principle testing shows presence of defects - answercan't prove that there are no
defects; reduces probability of undiscovered defects remaining in software but if no
defects are found, its not a proof of correctness
testing principle exhaustive testing is impossible - answertesting all combinations of
inputs and preconditions is not feasible except for trivial cases; risk analysis and
priorities should be used to focus testing efforts
testing principle early testing - answerstart testing as early as possible in the SDLC;
focus on defined objectives
testing principle defect clustering - answerfocused proportionally to expected and later
observed defect density of modules; a small # of modules contains most of the defects
discovered during pre-release testing / is responsible for most failures
testing principle pesticide paradox - answerif same tests are repeated, eventually same
set of test cases will no longer find any new defects. test cases need to be regularly
reviewed and revised. different tests need to be written to exercise different parts to find
more defects
testing principle testing is context dependent - answertesting is done differently in
different contests; safety critical software is tested differently from an e-commerce site
testing principle absence of errors fallacy - answerfinding/fixing defects doesn't help if
the system built is unusable / does not fulfill user's needs and expectations
5 fundamental test activities - answertest planning & control, test analysis & design, test
implementation & execution, evaluating exit criteria / reporting, test closure activities
test planning - answerdefining objectives & spec of test activities in order to meet the
objects and mission
control - answerongoing comparing actual progress against plan and reporting status /
deviations, taking actions to meet objectives. monitor activities throughout. planning
takes feedback from monitoring and control.
test analysis & design - answergeneral objectives turned into tangible test conditions
and test cases; tasks: review test basis, evaluate testabiity of test basis/ objects,
identify/prioritize test conditions, design/prioritize test cases, identify test data, design
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now