Week 2

Question 1

What kind of activity is requirements based testing?

Primarily a validation activity
Primarily both a verification and validation activity
Requirements based testing is neither a verification or validation activity.
Primarily a verification activity

Answer 1

Primarily a verification activity

Test cases are developed around a list of requirements to verify that each requirement is met in requirements based testing. This is a verification activity. There is no check as to whether there are the right requirements, which is a validation activity.

Question 2

What kind of activity is scenario based testing?

Primarily a verification activity
Primarily a validation activity
Requirements based testing is neither a verification or validation activity.
Primarily both a verification and validation activity

Answer 2

Primarily both a verification and validation activity

In scenario based testing, requirements are developed by creating use cases, and then tests are developed around the use cases. Having use cases makes it easier to validate whether the right requirements are there for an activity and then verify that test cases exist for each requirement, similar to the packing example from the lecture

Question 3

What is not a step in use case construction?

Identify how an actor uses the system to accomplish its functions
Identify how each use case can be tested
Detail each use case identifying each of its processing flows as a scenario
Identify the actors (determine the scope of the system)

Answer 3

Identify how each use case can be tested

Use case construction includes the actors, how the actors use the system and use cases for each behavior. Identifying how each use case can be tested comes afterwards when looking from a testing perspective.

Question 4

GQ - Question 1
Which of the following is not considered as an error in a state machine?
Dead State
Unreachable State
2 event from same state
2 same event from same state

Answer 4

2 event from same state

Question 5

GQ - True or False? Every requirement must be tested by at least one test case.

Answer 5

True

Question 6

GQ - True or False? Scenario based testing helps identify missing requirements.

Answer 6

True

Question 7

GQ - A text field on a form only accepts numeric values in the range of 19 to 26. Please identify the invalid equivalence partitions.

Answer 7

<19 >26

Question 8

GQ - A student can score a minimum of 20 points and a maximum of 50 points on an exam. What is a valid equivalence partition of scores?

Answer 8

20 to 50

Question 9

GQ - True or False? Decision trees are a way to perform cause and effect analysis.

Answer 9

True

Question 10

GQ - True or False? Decision trees and decision tables will always result in the same number of test cases.

Answer 10

False

Question 11

GQ - Three input variables, product number, price, and ratings are used to determine whether a product belongs in the “People’s Choice” category. Ratings is dependent on price and product number is independent of the other inputs. What method can be used to test this problem?

Equi P
State Based
Equi P and Cause and Effect
Timeline

Answer 11

Equi P and Cause and Effect

Question 12

GQ - True or False? A timeline can be used to test asynchronous events.

Answer 12

True

Question 13

Question 1

True or False? Equivalence partitioning is a good technique to utilize when there are multiple independent inputs.

Answer 13

True
Equivalence partitioning must be applied with independent inputs. In the lecture example of abs(x), it is necessary to test a negative value, 0, and a positive value which are all independent inputs.

Question 14

What is NOT an equivalence partitioning step?

For each input, identify a set of equivalence partitions and label them.

For each invalid equivalence partition, write a test case that covers one of the uncovered equivalence partitions.

Write test cases covering as many of the uncovered valid equivalence partitions as possible.

Write test cases covering as many of the uncovered invalid equivalence partitions as possible.

Answer 14

Write test cases covering as many of the uncovered invalid equivalence partitions as possible.
There must only be one test case that covers each uncovered invalid equivalence partition at a time. Since equivalence partitioning is used during black box testing, if there are multiple invalid partitions tested, it is not known which invalid partition caused the error.

Question 15

What are a good set of equivalence partitions for a password testing program where a password must be between 6-8 characters?

1. 6-8 characters; 2 < 6 characters
2. < 6 character; 2. > 8 characters

6-8 characters

1. 6-8; 2. < 6 characters; 3. > 8 characters

Answer 15

1. 6-8; 2. < 6 characters; 3. > 8 characters
   These equivalence partitions test all the possible inputs there could be for a password: a valid password between 6-8 characters, an invalid password with < 6 characters, and an invalid password with > 8 characters.

Question 16

A valid student ID can only contain digits between and including 2 and 7. What are the correct boundary values that need to be tested?

1,2

2,7

1,8

1,2,7,8

Answer 16

1,2,7,8

Question 17

Question 2
True or False? Boundary value analysis requires selecting test cases that are only on or above the edges of the input and output equivalence partitions.

Answer 17

False

BV analysis requires selecting test cases that are on, above, and below the edges of the partitions.

Question 18

Given 2 input variables, age and height, an output of vitamins, and a function that computes the number of vitamins a person should take based on age and height, which method(s) can be used to test this example?

Neither cause effect analysis nor equivalence partitioning

Equivalence partitioning

Cause Effect Analysis

Both cause effect analysis and equivalence partitioning

Answer 18

Cause Effect Analysis
Cause effect analysis can be used when the inputs are dependent on each other. Equivalence partitioning is only used when inputs are independent of each other.

Question 19

Question 2
What is one way to reduce the number of test cases in a cause and effect decision table?

Write as many test cases as there are partitions

Write only valid test cases

Make assumptions about how the partitions are related

Answer 19

Make assumptions about how the partitions are related

Question 20

Does creating a timeline to test synchronous events help with verification or validation?

Verification

Validation

Answer 20

Validation

Adding in events in a timeline helps identify missing requirements, which is necessary for validation.

Question 21

True or False? A timeline corresponds to a set of use cases mapped against time.

Answer 21

False

Each use case requires its own timeline.

Question 22

True or False? The basic strategy of testing a state machine is to visit each state and test each transition.

Answer 22

True

Testing each state / event combination provides a minimal state machine cover.

Question 23

Given the state diagram below with start state “A” and end state “E”, which of the following is a test one would derive from the state testing tree?

6 2 1

1 5 8

3 5 8

1 5 7 8

Answer 23

1 5 8

Question 24

What is NOT considered to be an advantage of model based testing?

Modeling gives potential for automated test generation.

Modeling requires manual test case generation.

Modeling provides precision and reduces ambiguity.

Modeling allows for changes in behavior to be directly translated into test changes.

Answer 24

Modeling requires manual test case generation.

Modeling gives potential for automated test generation, and does not require manual test case generation.

Question 25

What is the correct order of steps for model based testing?

Select test generation criteria, create a system model, generate tests, execute tests

Create a system model, select test generation criteria, generate tests, execute tests

Generate tests, create a system model, select test generation criteria, execute tests

Answer 25

Create a system model, select test generation criteria, generate tests, execute tests

Question 26

State Machine must be inspected for -
Validation
Verification
Both

Answer 26

Validation

Question 27

Model based testing assists with program
Verification
Validation
Both

Answer 27

Verification