6. Quiz Questions
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6. Quiz Questions

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6.1. Question 1: Where to Check Constraints

Where in the application code should the constraints be checked? In the ...

☐ controller code

☐ model classes

☐ user interface code

☐ underlying DBMS (if it supports constraint validation)

6.2. Question 2: Where to Define Constraints

Where in the application code should the constraints be defined? In the ...

☐ controller code

☐ model classes

☐ user interface HTML5 code

☐ user interface JavaScript code

6.3. Question 3: Counting Constraints

Figure 5.6. Class with constraints

Class with constraints

How many constraints are specified by the class model shown in the diagram?

Enter a number: _____

6.4. Question 4: Constraint Names

Figure 5.7. Class with constraints

Class with constraints

Which of the following constraints are specified by the class model?

☐ A range constraint for the property name.

☐ A uniqueness constraint for the property name.

☐ A referential integrity constraint for the property name.

☐ A uniqueness constraint for the property age.

☐ A mandatory value constraint for the property name.

☐ A mandatory value constraint for the property age.

6.5. Question 5: Compliant Objects

Figure 5.8. Class with constraints

Class with constraints

Which of the following objects do not represent admissible instances (or, in other words, violate a constraint) of the object type Person?

  1. ☐ {name: "Susan", age: 8}

  2. ☐ {name: " ", age: 0}

  3. ☐ {name: "Susan"}

  4. ☐ {name: "Peter", age: 122}

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5. Criteria for Evaluating the Validation Support of Frameworks Home Chapter 6. Implementing Constraint Validation in a Java Web App