Development And Testing
Overview
A new system might look finished, but until it has been tested thoroughly nobody knows whether it really works. Development and testing is the stage where the system is built up, piece by piece, and deliberately attacked with carefully chosen data to expose every fault before real customers ever touch it. The goal is simple: find the bugs now, while they are cheap to fix, not after the system goes live.
In this lesson you will learn why a system must be tested before implementation, how testing is planned with a test plan, and how software is tested module by module and then as a whole. Above all you will master the three kinds of test data, normal, abnormal and extreme, and learn what live data is and why it is used as the final check.
Objectives
- Testing.
- The need to test the system before implementation Test designs, test strategies, test plan (test data, expected outcomes, actual outcomes, remedial action) following testing Test designs including the testing of data structures, file structures, input formats, output formats and validation routines Test strategies including to test each module, each function and the whole system The definition, characteristics and use of test data using normal, abnormal and extreme data The use of live data.
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Lesson Evaluation
Congratulations on completing the lesson on Development And Testing. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- A field accepts whole numbers from 1 to 100. Which value is extreme data? A. 50 B. 100 C. 101 D. fifty Answer: B
- Data that is outside the acceptable range and should be rejected is called: A. Normal data B. Extreme data C. Abnormal data D. Live data Answer: C
- Real data with known outcomes, used as a final test, is called: A. Normal data B. Live data C. Extreme data D. Abnormal data Answer: B
- Software is usually tested in which order? A. Whole system, then modules B. Each module, then each function, then the whole system C. Live data, then modules D. Output formats only Answer: B
- Which column would NOT normally appear in a test plan? A. Expected outcome B. Actual outcome C. Type of test data D. Name of the programmer's manager Answer: D
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