15 Lecture

Question 1

What are the Reasons for continuous integration?

Answer 1

• The later the integration is done, the higher the risk of unexpected failures
• When a software system becomes more complex, the integration of its components gets harder
• With continuous integration, integrating and testing is done as early as possible

Question 2

Define Failure

Answer 2

Any deviation of the observed behavior form the specified behavior (crash)

Question 3

Define Error

Answer 3

The system is in a state such that further processing can lead to a failure

Question 4

Define Fault

Answer 4

The mechanical or algorithmic cause of an error (bug)

Question 5

3 Ways to deal with Fault

Answer 5

Fault avoidance
Fault detection
Fault tolerance

Question 6

What is the testing activities for Object Design

Answer 6

Unit Testing

Question 7

What is the testing activities for System Design

Answer 7

Integration Testing

Question 8

What is the testing activities for Requirements Analysis

Answer 8

System Testing

Question 9

What is the testing activities for Client Expectation

Answer 9

Acceptance Testing

Question 10

Explain Unit Testing

Answer 10

• Individual components are tested by the developers

Goal: Confirm that the component/ Subsystem is correct and carries out the intended functionality

Question 11

Explain Integration Testing

Answer 11

Groups of subsystems and the entire system are tested by the developers
Goal: Test the interfaces of the subsystems

Question 12

Explain System Testing

Answer 12

Entire system is tested by the developers.

Goal: Determine if the system meets the requirements

Question 13

Explain Acceptance Testing

Answer 13

Evaluates the system delivered. Carried out by the client.

Goal: Demonstrate that the system meets the requirements and is ready to use

Question 14

What is an Alpha test

Answer 14

• Client uses the software at the developer’s environment
• Controlled setting
• Developers always ready to fix bugs

Question 15

What is an Beta test

Answer 15

• Conducted at client’s environment

- Realistic workout for software

Question 16

Define Continuous Integration

Answer 16

• Software Development technique
• members of a team integrate their work frequently
• each integration is verified by an automated build
• each build tests are executed to detect integration errors as quick as possible

Question 17

What are the advantages of continuous integration

Answer 17

+ Always an executable version of the system
+ Good overview of the project status
+ Automatic regression testing

Question 18

What is the goal of regression testing

Answer 18

verify that the software previously developed and tested still performs correctly even after it was changed or interfaced with other software

Question 19

AD of regression testing

Answer 19

+ find errors in existing source code immediately after a change is introduced

• can be very costly to execute a large test suite after each change

Question 20

Which techniques are used in regression testing

Answer 20

• Retest all
• Regression test selection
• Test case prioritization