Software Development Engineer

The Tools used in Unit Testing are debuggers, tracers and is Done by Programmers. Unit testing verifies the functioning in isolation of software pieces which are separately testable.

We impose abnormal input to stress the capabilities of the software. Input data volume, input data rate, processing time, utilization of memory, etc. are tested beyond the designed capacity.

System testing conducted once again according to hardware configuration requirements. Installation procedures may also be verified.

Some of the testing under this category and what they mean are as follows.

It checks that the functional specifications are correctly implemented. Can also check if Non Functional behavior is as per expectations.

It is verifying that the software meets the specified performance requirements (response time, volume.

Probably one term which you must be aware of as we often hears this software is in Alpha phase and in Beta phase. Here Testing is done by representative set of potential users for trial use. Please Note - in-house (alpha testing) - external (beta testing).

Testing conducted to determine whether or not a system satisfies its acceptance criteria and to enable the customer to determine whether or not to accept the system. It is Done against requirements and is done by actual users.

It is used when software meant for different types of users. It also check that whether the software performs for all users.

It is used to Verify whether the build is ready for feature/requirement based testing).

It is used in verifying software restart capabilities after a "disaster".

It is ued toverify proper controls have been designed.

Regression Testing accdoing to IEEE is "selective retesting of a system or component to verify that modifications have not caused unintended effects". It is repetition of tests intended to show that the software's behavior is unchanged, except insofar as required. It Can be done at each test level.

It evaluate the Human Computer Interface. Verifies for ease of use by end-users. Verifies ease of learning the software, including user documentation. Checks how effectively the software functions in supporting user tasks. Checks the ability to recover from user errors.

This Question is often asked in Microsoft of from any other company who is looking to hire you for testing work. A test case will have 5 section.

The steps involved are Planning Analysis Design coding testing. After testing maintenance of the product in also involved.

IEEE Defines it as The process of testing an integrated hardware and software system to verify that the system meets its specified requirements. It is tested against system specification. May test manual procedures, restart and recovery, user interface, stress, performance. In System Testing, real data is used and sometimes users participation is also used.

Functional Requirements are the Expected functionality or services from the system.

Non - Functional Requirements are System property and constraints. Now Constraints can be on requirements itself. Some examples are of Response time, 24X7 availability of the system etc.

SRS stands for Software Requirement Specification.

It establishes the basis for agreement between customers and contractors or suppliers on what the software product is expected to do, as well as what it is not expected to do.

Some of the features of SRS are -

★ It sets permits a rigorous assessment of requirements before design can begin.

★ It sets the basis for software design, test, deployment, training etc. It also sets pre-requisite for a good design though it is not enough.

★ It sets basis for software enhancement and maintenance.

★ It sets Basis for Project plans like Scheduling and Estimation.