Single Page Web Applications with AngularJS Week 2 Quiz
Course Name: Single Page Web Applications with AngularJS
Course Link: Single Page Web Applications with AngularJS
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 10
Question 1
In the following snippets of code, the ‘lowered’ variable ends up with the exactly the same value:
Snippet #1:
var output = $filter('lowercase');
var lowered = output("GIVE ME COOKIES NOW!");Snippet #2:
var lowered = $filter('lowercase')("GIVE ME COOKIES NOW!");True
False
Answer: True
Question 2
Assuming value is a .23, what will the following snippet of code produce?
{{ value | currency : '%' : 3 }}It will produce an error.
23
$.23%
%0.230
%.230
Answer: %0.230
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 11
Question 1
The name of the function that implements the filter factory function must contain the word “Factory”
True
False
Answer: False
Question 2
Assuming ‘CustomFilterFactory’ function is properly defined, the following is a valid filter declaration:
angular.module('app', [])
.filter('custom filter', CustomFilterFactory);True
False
Answer: False
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Question 3
Given the following filter declaration:
angular.module('app', [])
.filter('hello', CustomFilterFactory);What is the correct way to inject it into a controller function ‘Ctrl’?
Answer:
Ctrl.$inject = ['helloFilter'];
function Ctrl (helloFilter) {
...
}Quiz 12
Question 1
If one of the watchers detected a change, what’s the least number of times that the Digest Loop will run in total?
1
2
At least once.
8
Answer: 2
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 13
Question 1
How many watchers does Angular setup for the following snippet of code?
<input type="text" ng-model="value">
<div>{{ value + '!' }}</div>
<button ng-click="getValue()">Get Value</button>0
1
2
3
4
Answer: 2
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 14
Question 1
One-time binding improves performance because it never sets up an Angular watch that the Digest Cycle needs to execute.
True
False
Answer: False
Question 2
How many watches remain after the user clicks the button, considering this snippet:
<div>{{ ::value }}</div>
<button ng-click="value = 3">Get Value</button>0
1
2
Answer: 0
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 15
Question 1
Assuming ‘items’ is an array of objects like the following:
{
name: 'Yaakov',
occupation: 'Professional Cookie Eater'
}Identify invalid code below.
Answer:
<div ng-repeat="item in items">
name: {{ items.item.name }} <br>
occupation: {{ items.item.occupation }}
</div>These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 16
Question 1
Given the following code snippet, what will be the output of the statement on line 6.
var student1 = {
message: "I LOVE this course!"
};
var student2 = Object.create(student1);
console.log(student2.message);undefined
empty string or “”
I LOVE this course!
Uncaught ReferenceError: message is not defined
Answer: I LOVE this course!
Question 2
Given the following code snippet, what will be the output of the statement on line 11.
var student1 = {
message: "I LOVE this course!"
};
var student2 = Object.create(student1);
student2.getMessage = function () {
this.message = "Student 1 was paid off by Yaakov to say that!";
return this.message;
};
var coverUp = student2.getMessage();
console.log(student2.message);I LOVE this course!
undefined
Student 1 was paid off by Yaakov to say that!
Answer: Student 1 was paid off by Yaakov to say that!
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Question 3
Given the following function, how must this function be called such that the output of the function is an object with the property name whose value is “Yaakov”?
function Person(name) {
this.name = name;
}Answer:
var p = new Person("Yaakov");Quiz 17
Question 1
True or false: given the following code snippet, the code on line 3 causes the Javascript engine to go up the prototype chain.
<div ng-controller="Controller1 as ctrl1">
<div ng-controller="Controller2 as ctrl2">
{{ ctrl1.name }}
</div>
</div>True
False
Answer: True
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 18
Question 1
In the following code snippet, the CustomService function will be treated as a function constructor by the AngularJS framework.
angular.module("MyApp")
.service('CustomService', CustomService);
...
...True
False
Answer: True
Question 2
What is a Singleton?
AngularJS component that can’t find its soulmate.😢
It’s a Design Pattern that is a central place for producing objects.
It’s a Design Pattern that restricts the object to always having a single instance.
It’s a Design Pattern used exclusively for server-side programming
Answer: It’s a Design Pattern that restricts the object to always having a single instance.
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 19
Question 1
When creating a service with the .factory() method, it is ultimately the AngularJS framework that creates the function/object that is the service.
True
False
Answer: False
Question 2
The .factory() method is limited to producing only Singleton Services. It can’t simply produce some object we want to use in our application.
True
False
Answer: False
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
Quiz 20
Question 1
The function passed into angular.module(…).config(MyFunction) is guaranteed to run before services, factories, or controllers are created.
True
False
Answer: True
Question 2
Fill in:
To configure a service, it must be injected into the function passed into the .config() function with the extra string “___1___” appended to the ___2___.
1: Config
2: Module name
1: Provider
2: Name of the function the project was declared with
1: Provider
2: String name the provider was declared with. (passed into .provider as the first argument)
Answer: 1: Provider
2: String name the provider was declared with. (passed into .provider as the first argument)
Quiz 21
Question 1
The ng-if=”value” directive inserts “display: none” on the element it’s declared on if the ‘value’ evaluates to ‘false’, hiding the element.
True
False
Answer: False
These are Single Page Web Applications with AngularJS Week 2 Quiz Answers
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