22. What is a DDO Directive Deﬁnition Object?
23. What is a singleton pattern and where we
can ﬁnd it in Angularjs?
24. What is an interceptor? What are common
uses of it?
25. How would you programatically change or
adapt the template of a directive before it is
executed and transformed?
26. How would you validate a text input ﬁeld for a
twitter username, including the @ symbol?
27. How would you implement application-wide
exception handling in your Angular app?
28. How do you hide an HTML element via a
button click in AngularJS?
29. How would you react on model changes to
trigger some further action?
For instance, say you have an input text ﬁeld
called email, and you want to trigger or
execute some code as soon as a user starts
to type in their email.
30. How do you disable a button depending on a
31. Did you know how to answer all 29 questions?
Feel free to check your answers here!