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Software Engineering
Software engineering is the process of applying well-developed techniques and practices in order to create new software products. Questions about everything from design patterns to requirements and specification belong here.
1,663 Questions
How does a flow chart look like?
What a flow chart looks like depends a bit on the type of flow chart, but in general it shows the movement of information and decisions. Typically information is in rectangles, decision points are diamonds or circles, and outputs can be ovals, circles, or squares. All are connected by lines with arrows showing the direction of the information flow.
What is logarithmic poisson execution time model?
A new software reliability model is developed that predicts expected failures (and hence related reliability quantities) as well or better than existing software reliability model
this works for cases where the operational profile remains unchanged, and where corrections (perfect or imperfect) are made when a failure is observed
An argument against a small time quantum: Efficiency. A small time quantum requires the timer to generate interrupts with short
intervals. Each interrupt causes a context switch, so overhead increases with a larger number of interrupts.
An argument for a small time quantum: Response time. A large time quantum will reduce the overhead of context switching since
interrupts will be generated with relatively long intervals, hence there will be fewer interrupts. However, a short job will have to wait
longer time on the ready queue before it can get to execute on the processor. With a short time quantum, such a short job will finish
quicker and produces the result to the end user faster than with a longer time quantum
It is safe to estimate that the cost of fixing a problem increases by roughly an order of magnitude in each phase of development.
- requirements phase (cost 1)
- preliminary design phase (cost 10)
- detailed design phase (cost 100)
- coding phase (cost 1000)
- testing phase (cost 10000)
How can we perform mobile testing?
Mobiles have become an integral part of every persons life in today's world. Technology has become so advanced that everything has been digital from learning to certifications, medical check ups to reports, buying to selling, entertainment to traveling. Thus for doing all this, thousands of mobile apps are available in mobile app stores. So, testing mobile apps depend on its behavior, functionality and requirements. For example, a customer may require his product to be verified on various platforms such as on different versions of android and ios.
Common Testing scenarios related to type of testing are listed below:
Functional testing:
1. All mandatory fields are marked distinctively.
2. Application should get minimize in case call is triggered in mid while application is running.
3. Application is properly linked to payment gateways specially for e-commerce.
4. Application behavior is verified at various scenarios such as relaunch/interruptions on calls or messages/idle screen.
5. Proper validations are displayed for filling out fields.
6. Crash points are analyzed through ad-hoc testing of application.
7. Forward and backward navigation through application pages.
8. UI is not broken.
9. Validate search filters.
10. Validate a user guide is provided for user reference.
11. Update notifications are properly displayed.
12. Validate application performs satisfactorily without causing memory and performance issues in device.
13. Validate page scrolls properly when required in application.
14. Link provided should be accessible.
Performance testing:
1. Validate application performs satisfactorily without causing memory and performance issues in device.
2. Proper network errors are shown whenever there are network issues.
3. Network latency test can be used to verify application behavior on different Internet speeds.
4. Device is able to perform multitasking requirements whenever it is necessary to do so.
5. Validate response time.
Security testing:
1. Verify Password is always displayed in encrypted form.
2. Session should be managed properly for preventing unauthorized users access to application.
3. Prevention from SQL injection related attacks should be verified.
4. Application such as related to banking or documents should auto-log out once closed.
Usability testing:
1. Buttons are placed in same section of screen to avoid confusion to end users.
2. Icons are resembling and consistent with the application.
3. Font size is big enough to be readable.
4. Buttons are big enough in size to be selected.
Mobile app security testing is one of the major concern for software testing services providers. As information security has become a primary need, with growing use of technologies and devices. So, while testing any application, one should also ensure that app not only functions properly but also provide security to user's information as well.
What is formal and informal requirements in software engineering?
Formal requirements are the software features that the developers are contractually obligated to implement in the software. It is usually designated as a "shall" statement as in "X shall do this".
Informal requirements are the software features that are nice to have but would not be a breach of contract if the developers failed to implement it in the software. These requirements may have have the word "will" as in "X will do this".
Is lesson time wasted during power cuts when technology cannot be used?
No. The teacher still has a voice, and the student still has an ear. Both, also, have a brain.
How many 7 distinct digit telephone numbers are there if the 1st digit may not be zero?
Nine million of them.
Apply waterfall model for railway reservation system?
i need water fall model of railway reservation system.
Why does int has the same range as short?
The int is a data type in c, c++ or java, It can divided in to two parts that is short and long. Int short if of same size as int (2).
Why you chose Software testing as a Career?
In the recessation market of IT I think testing is the only industry which is showing a growth of 30% every year. Moreover it is not dependent on any technology so if one technology market say Java is down that does not mean you cannot have a testing project. In all technologies you need a testing team to test your application. As a rule of thump 30% of your team should be part of QA.
So joining testing means securing your career.
Difine what is fixed tapped resistor?
This is usually a resistance wire wound resistor that has a physical connection on the body of the resistor called a tap. It about the same as tapping a water line to attached a hose line to your icemaker.
Answer
It is difficult for the customers to state the requirements clearly and well understood at the beggning.
Why grasshopper operating system called as a grasshopper?
because it does simultaneous action for accessing the memory.
Relay are mainly use to isolate one source from another. It is old technology new circuits can surpass that requirement.
What is limitation of prototyping process model?
The prototype is not used as final product hence may require extra cost.Participation of user and customer feedback is not always possible.
