QA (Testing) Interview Questions and Answers (96) - Page 1

What is Penetration test?

As per Wikipedia,

A penetration test is a method of evaluating the security of a computer system or network by simulating an attack from a malicious source, known as a Black Hat Hacker, or Cracker.

Refer to and for more details.

What is black box testing

Black box testing is also termed as functional testing. It ignores how the internal
functionality of a system works and depends only what are the outputs on specified
inputs. Source code availability is not an important in back box testing. Black box testing is mostly to ensure that it meets the user functionality.
What isWhite box testing?

White box testing is opposite to Black box it requires internal know how of how the logic flows. As this testing needs know how of the internal structure it can only be done programmers. Unit testing is one of the ways of doing White box testing in which programmers use NUNIT or JNUIT to test each class individually. White box testing can be done by programmer by either stepping through the code or testing the classes and components in isolation.
Difference between blackbox testing and whitebox testing

Black box testing - Testing a system without having specific knowledge .

whitebox testing - Testing a system with knowing the internal logic.
What is Gray-box testing?

Gray-box testing is the combination of White-box and Black-box
What is Acceptance Testing?

Testing conducted to enable a user/customer to determine whether to accept a software product. Normally performed to validate the software meets a set of agreed acceptance criteria.
What is Ad Hoc Testing?

A testing phase where the tester tries to 'break' the system by randomly trying the system's functionality. Can include negative testing as well.
What is Application Binary Interface (ABI)?

A specification defining requirements for portability of applications in binary forms across different system platforms and environments.
What is Bottom Up Testing?

An approach to integration testing where the lowest level components are tested first, then used to facilitate the testing of higher level components. The process is repeated until the component at the top of the hierarchy is tested.
What is Boundary Testing?

Test which focus on the boundary or limit conditions of the software being tested.
What is CMM?

The Capability Maturity Model for Software (CMM or SW-CMM) is a model for judging the maturity of the software processes of an organization and for identifying the key practices that are required to increase the maturity of these processes.
What is Cause Effect Graph?

A graphical representation of inputs and the associated outputs effects which can be used to design test cases.
What is Integration Testing?

Testing of combined parts of an application to determine if they function together correctly. Usually performed after unit and functional testing. This type of testing is especially relevant to client/server and distributed systems.
What is Performance Testing?

Testing conducted to evaluate the compliance of a system or component with specified performance requirements. Often this is performed using an automated test tool to simulate large number of users. Also know as "Load Testing".
What is Defect Measurement?

Defect Measurement is a process for analyzing the efficiency of developer and tester and the process on the base of the bug details collected from one
Through Defect Measurement what are all the factors are measured?

1) Efficiency of developer
2) Efficiency of tester
3) Whether the progress is in gear?
What is MTBF?

Mean Time Before Failure
What is Alpha and Beta Testing ?

Alpha Testing:

A virtual user environment can be created for
this type of testing. Testing is done at the end of
development. Still minor design changes may be made as a
result of such testing.

Beta testing:

Testing is done by end-users or others. Final
testing before releasing application for commercial purpose
is called Beta Testing.
What is STLC? Explain about the steps of STLC?

STLC stands for Software Test Life Cycle .

1.Test Planning
Prepare the test plan document, and test cases.

2.Test Development
Preparing requirements documents, UseCase documents, Traceability documents.

3.Test Execution
Executing all Test cases and filling actual results using testing tools and utilities.

4.Result Analysis
Comparing expected results with actual results.

5.Bug Tracking
Filed bugs are identified ,isolated and managed.

Bug Reporting process, is the reporting of bugs in a database to track further.
What is Error, Bug and Defect?

Error --> Which comes at the time of development.
Bug --> Which comes at the time of testing. (Pre-Release)
Defect --> Which comes in Production. (Post-Release)
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