Ans: Alpha testing is simulated operational testing performed by users/customers or an independent test team at developers site. Alpha testing is often employed for off the shell software as a form of internal acceptance testing.

Ans: This is point at which some deliverable produced during software engineering process is put under formal change control.

Ans: Risk base testing is the term used for an approach to create a test strategy that is based on prioritizing tests by risks. The basis of this approach is a detailed risk analysis and prioritizing test by risk.

Ans: Basic path testing is mixture of path testing and branch testing. It fulfills all the requirements of branch testing and also tests all of the independent paths which can be used to construct any arbitrary path through computer program.

(OR)

A basic path is a unique path through software where no iterations are allowed, all the possible paths through system are linear combination of them.
Path testing: Testing that is designed to execute all or selected path through computer program.
Branch testing: Testing that is designed to execute each outcome of each resolution point in a computer program.

Ans: In computing, basic block is a portion of code in a program with attractive properties which makes it highly amenable to analysis.

Ans: It helps to prevent defects from being introduced in to the code.

Ans: Comparing with informal review, formal review follows the formal process. A typical formal review consists of six steps they are:
Planning
Kick off
Preparation
Review meeting
Rework
Follow up

What is purpose of test completion criterion?

Ans: The main purpose of test completion criterion is to determine when to stop testing.

Ans:  Application programming interface is a specification that is planned to be used as an interface by software components to communicate with each other.

Ans: Application binary interface describes the low level interface between an application program and operating system or any other application.