Week 8 & 9

Question 1

In a Use Case we describe?

Answer 1

How a system will respond to a given scenario?

Question 2

Use case is?

Answer 2

User-oriented

Question 3

What does user-oriented mean?

Answer 3

We specify the actions done by the user

The actors see in a system

Question 4

What SW testing level is a use case testing?

Answer 4

Unit testing

Question 5

What are the 2 main steps when writing testing for use cases?

Answer 5

1. Write test cases for normal flow

2. Write exceptions test cases

Question 6

Sunny day use cases?

Answer 6

Primarily cases that are most likely to happen, where everything goes well (normal flow)

Question 7

Rainy day use cases?

Answer 7

Edge cases

Take priority after sunny day use cases

Question 8

White Box testing should cover?

Answer 8

Statement coverage
Control flow testing
Path & Basis path coverage
Branch coverage

Question 9

What is Statement Coverage?

Answer 9

Execution of all executable statements in the source code atleast once

Question 10

Which SW testing technique is statement coverage?

Answer 10

White box testing technique

Question 11

Why use Statement Coverage?

Answer 11

To calculate the number of source code statements which can be executed

Question 12

Statement Coverage formula?

Answer 12

(# of executed statements/total # of statements) * 100

Question 13

What is covered by Statement Coverage?

Answer 13

Unused statements
Unused branches
Dead code

Question 14

What is NOT covered by Statement Coverage?

Answer 14

Missing statements in the source code

Question 15

How can we identify missing code statements?

Answer 15

Control Flow Coverage

Question 16

Cons of Statement Coverage?

Answer 16

Expensive in time and money required

Doesn’t reveal missing code or statements

Question 17

Pros of Statement Coverage?

Answer 17

Identifies unused code
Identifies unused branches
Identifies dead code

Question 18

Control Flow depicts a program as?

Answer 18

Graph

Question 19

What does Control Flow graph contain?

Answer 19

Nodes and Edges

Question 20

What is a node?

Answer 20

Represents an indivisible group if code statements

Question 21

What is the purpose of edge?

Answer 21

Connects 2 nodes

* If the 2nd statement might be executed immediately after the 1st statement

Question 22

What is Path Testing?

Answer 22

Also called structural testing

Execute every path atleast once

Question 23

Is Path Testing challenging and time consuming and why?

Answer 23

It is time consuming

Testing each point is challenging and time consuming

Question 24

How to reduce the challenges and time required to perform Path Testing?

Answer 24

Reduce redundant tests
Achieve maximum test coverage
By using basis path testing

Question 25

Basis Path Coverage?

Answer 25

Executes every path at least once

Question 26

Basis Path Coverage is the same as path testing except?

Answer 26

It defines test cases based on the flow or logical paths that can be taken Independent path has at least one edge not traversed before in any other paths

Question 27

How is basis path coverage different from path coverage?

Answer 27

Achieves maximum path coverage with least number of test cases

Question 28

What is Cyclometric Complexity?

Answer 28

A metric determining the number of paths

Question 29

Independent path has?

Answer 29

At least one edge not traversed before in any other paths

Question 30

Basis Set?

Answer 30

A set of all independent paths of a program

Question 31

Cyclometric Complexity can be calculated with respect to?

Answer 31

Functions Modules Methods Classes

Question 32

How to reduce cyclomatic complexity?

Answer 32

Limit the complexity of routines during development

Question 33

Cyclomatic Complexity number 1-10 meaning?

Answer 33

Structured & well written code High testability Cost and Effort is less

Question 34

Cyclomatic Complexity number 10-20 meaning?

Answer 34

Complex code Medium testability Cost and effort is medium

Question 35

Cyclomatic Complexity number 20-40 meaning?

Answer 35

Very complex code Low Testability Cost and effort are high

Question 36

Cyclomatic Complexity number >40 meaning?

Answer 36

Not at all testable | Very high cost and effort

Question 37

Basis Path Testing guarantees execution of atleast?

Answer 37

One statement during testing

Question 38

Basis Path Testing benefits?

Answer 38

Helps to reduce the redundant tests Focuses attention on program logic Helps facilitate analytical vs arbitrary test case design

Question 39

100% Path coverage implies?

Answer 39

100% Branch Coverage

Question 40

100% Path coverage implies?

Answer 40

100% Statement coverage

Question 41

Branch Coverage?

Answer 41

Excecute all branches - Branches are outgoing edges of a decision point Covers missing statements

Question 42

Branch Coverage function?

Answer 42

BC = (# of executed branches/total number of branches)

Question 43

100% branch coverage implies?

Answer 43

100% statement coverage