if a conditional expression for an ng-if directive on a div element evaluates to false, then which of the following options correctly describes the result of this event?

The div tag will be hidden using CSS properties.

The visibility of the div tag will be made 0 using CSS properties.

The div tag will be entirely removed from the DOM.

The div tag will become visible in the view.

Answer & Explanation

Correct Answer: The div tag will be entirely removed from the DOM.

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if the HTML template display causes a f‌lickering effect in an AngularJS application, which directive can be used to avoid that effect?

ngTransclude

ngSwitch

ngCloak

nglf

Answer & Explanation

Correct Answer: ngCloak

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How does the emulated view encapsulation mode handle CSS for a component?

It renders the CSS exactly how you wrote it without any changes.

It makes use of shadow DOM markup and CSS.

It creates unique attributes for DOM elements and scopes the CSS selectors you write to those attribute ids.

It renders all of the CSS rules you write as inline CSS on all of the DOM elements you use them on in the template.

Answer & Explanation

Correct Answer: It creates unique attributes for DOM elements and scopes the CSS selectors you write to those attribute ids.

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What is an alternative way to write this markup to bind the value of the class field userName to the h1 element title property?

Current user is {{ userName }}

title="userName"

title="{{ userName }}"

title="{{ 'userName' }}"

The only way to do it is by using the square brackets.

Answer & Explanation

Correct Answer: title="{{ userName }}"

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The ngChange expression in AngularJS is evaluated:

Only when the input value is invalid continuously since the model will stay null.

Only when the model has modif‌ied programmatically and not by changing the input value.

Only when there is no modif‌ication in the value that is returned from the sparsers transformation pipeline.

Only when a modif‌ication in the input value causes a new value to be committed to the model.

Answer & Explanation

Correct Answer: Only when a modif‌ication in the input value causes a new value to be committed to the model.

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Which of the following methods can be used to create a service?

Only factory

Only service

Both factory and service

Answer & Explanation

Correct Answer: Both factory and service

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What is the purpose of the valueChanges method on a FormControl?

It is used to configure what values are allowed for the control.

It is used to change the value of a control to a new value. You would call that method and pass in the new value for the form field. It even supports passing in an array of values that can be set over time.

It returns a Boolean based on if the value of the control is different from the value with which it was initialized.

It is an observable that emits every time the value of the control changes, so you can react to new values and make logic decisions at that time.

Answer & Explanation

Correct Answer: It is an observable that emits every time the value of the control changes, so you can react to new values and make logic decisions at that time.

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What is the RouterModule.forRoot method used for?

Registering any providers that you intend to use in routed components.

Registering route definitions at the root application level.

Indicating that Angular should cheer on your routes to be successful.

Declaring that you intend to use routing only at the root level.

Answer & Explanation

Correct Answer: Registering route definitions at the root application level.

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What are Angular lifecycle hooks?

Loggers for tracking the health of an Angular app

Providers that can be used to track the instances of components

Built-in pipes that can be used in templates for DOM events

Reserved named methods for components and directives that Angular will call during set times in its execution, and can be used to tap into those lifecycle moments

Answer & Explanation

Correct Answer: Reserved named methods for components and directives that Angular will call during set times in its execution, and can be used to tap into those lifecycle moments

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Which service does the HTML $compile service use for the purpose of data binding?

$locale

$sce

$f‌ilter

$interpolate

Answer & Explanation

Correct Answer: $interpolate

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Angular JS Quick Quiz

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Angular JS MCQ

Angular JS Quick Quiz

if a conditional expression for an ng-if directive on a div element evaluates to false, then which of the following options correctly describes the result of this event?

if the HTML template display causes a f‌lickering effect in an AngularJS application, which directive can be used to avoid that effect?

How does the emulated view encapsulation mode handle CSS for a component?

What is an alternative way to write this markup to bind the value of the class field userName to the h1 element title property?

Current user is {{ userName }}

The ngChange expression in AngularJS is evaluated:

Which of the following methods can be used to create a service?

What is the purpose of the valueChanges method on a FormControl?

What is the RouterModule.forRoot method used for?

What are Angular lifecycle hooks?

Which service does the HTML $compile service use for the purpose of data binding?