#commonangularinterviewquestions

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Angular Interview Questions and Answers: Part 14

Q160. How can you register a service at Component Level in Angular? Q161. How can you register a service at the Module Level in Angular? Q162. What is the difference between providing services in Modules vs Components? Q163. How can you register a service into another service in Angular? Q164. What is the Service Scope in Angular? Q165. What is the difference between the service registered as root vs platform type in the ProvidedIn property of Angular? Q166. What is the difference between a service registered as "root" vs "any" type in the ProvidedIn property of Angular? Q167. What is the difference between providedIn: root vs forRoot() pattern in Angular? Q168. What are the different ways to create Singleton Services in Angular? Q169. What is an Element Injector Tree in Angular? Q170. What is the Merge Injector in Angular?

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Angular Interview Questions and Answers: Part 14

This is the 14th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q160. How can you register a service at Component Level in Angular? Q161. How can you register a service at the Module Level in Angular? Q162. What is the difference between providing services in Modules vs Components? Q163. How can you register a service into another service in Angular? Q164. What is the Service Scope in Angular? Q165. What is the difference between the service registered as root vs platform type in the ProvidedIn property of Angular? Q166. What is the difference between a service registered as "root" vs "any" type in the ProvidedIn property of Angular? Q167. What is the difference between providedIn: root vs forRoot() pattern in Angular? Q168. What are the different ways to create Singleton Services in Angular? Q169. What is an Element Injector Tree in Angular? Q170. What is the Merge Injector in Angular?

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Angular Interview Questions and Answers: Part 10

This is the 10th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q110. What are the Components in Angular? How can you create a component in Angular? Q111. What are Modules in Angular? What are the advantages of modules in Angular? Q112. What is declarable in Angular? Where it is defined in Angular? Q113. What are the different types of Modules in Angular? Q114. What is the difference between RootModule vs FeatureModule in Angular? Q115. What is CommonModule in Angular? What is the difference between CommonModule vs BrowserModule in Angular? Q116. What will happen if browserModule is used in a Feature Module? Q117. What will happen if you import the same module twice in Angular? How can you avoid circular module dependency in Angular? Q118. What is the difference between a Component vs. Module in Angular? Q119. What is the difference between Component vs. Directive in Angular? Q120. What is the difference between NgModule vs. JavaScript Module? Q121. How does Angular find components, directives, and pipes in a template? What is a template reference?

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Angular Interview Questions and Answers: Part 09

Q096. What are the differences between @Component vs. @NgModule vs. @Directive decorator in Angular? Q097. What is @Inject Decorator in Angular? Q098. What is the difference between @Inject() vs. @Injectable() in Angular? Q099. What is @Input Decorator in Angular? Q100. What is @Output Decorator in Angular? Q101. What is Content Projection in Angular? What is the use of ng-content in Angular? Q102. What is the difference between @ContentChild vs. @ContentChildren decorators in Angular? Q103. What is the difference between @ViewChild vs. @ViewChildren decorator in Angular? Q104. What is the use of @HostBinding Decorator in Angular? How it is different from @HostListener? Q105. What is @Host Decorator in Angular? What is the difference between @Host vs. @Self decorator? Q106. What is the use of @Self Decorator in Angular? Q107. What is the use of @SkipSelf Decorator in Angular? Q108. What is @Optional Decorator in Angular? What is the use of @Optional Decorator in Angular? Q109. What is the difference between @Self vs. @SkipSelf vs. @Optional decorator in Angular?

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Angular Interview Questions and Answers: Part 08

This is the 8th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q084. What is the difference between Annotations vs. Decorators in Angular? Q085. What are the different types of Decorators in Angular? Q086. What are Class Decorators in Angular? What are the different types of class decorators in Angular? Q087. What are Method Decorators? What are the different types of method decorators in Angular? Q088. What are Property Decorators or Field Decorators? What are the different types of property decorators in Angular? Q089. What is the difference between @HostBinding vs. @HostListener decorators in Angular? Q090. What are Parameter Decorators in Angular? What are the different types of parameter decorators in Angular? Q091. What is @NgModule Decorator in Angular? Q092. What is @Component Decorator in Angular? Q093. What is @Injectable Decorator in Angular? Q094. What is @Directive Decorator in Angular? What are the different types of directives in Angular? Q095. What is @Pipe Decorator in Angular?

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Angular Interview Questions and Answers: Part 11

This is the 11th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q122. What are Directives in Angular? When to use directive? Q123. What are the different types of directives in Angular? Q124. What is the use of the *ngFor directive? What is the difference between the *ngFor vs. ngForOf directive in Angular? Q125. What is the index property in *ngFor directive? What is the use of index property in *ngFor directive? Q126. What is the purpose of *ngFor trackBy in Angular? Q127. What is the use of the *ngIf directive in Angular? Q128. What is the difference between the *ngIfElse vs. *ngIf directive in SQL? Q129. How can you use both *ngFor and *ngIf directives together on the same element? Q130. What is the difference between the *ngIf directive vs. hidden property in Angular? Q131. What is the use of the *ngSwitch directive? Q132. What is the difference between the *ngStyle vs. *ngClass directive in Angular? Q133. What is the use of ng-template in Angular? Q134. What is the use of the ngModel directive in Angular? What is the "banana-in-a-box" syntax in Angular? Q135. What is the difference between the (ngModel) vs [ngModel] vs [(ngModel)] directive in Angular?

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Angular Interview Questions and Answers: Part 22

This is the 22st part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q246. How do you get the current route in Angular? Q247. What is the safe navigation operator in Angular? Q248. What is non-null assertion operator in Angular? How it is different from a safe navigation operator? Q249. What does mean by relative path in Angular? How can you specify a relative route in Angular? Q250. What is the child route in angular? How it is different from Nesting routes? Q251. What is the page title? How can you set the page title in Angular? Q252. What is the Link Parameters Array in Angular? Q253. What are the default LocationStrategy and URL styles supported by Angular? Q254. What is the purpose of tag in Angular? Q255. What do you understand by the RouterState?

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Angular Interview Questions and Answers: Part 21

This is the 21st part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q235. What are the wildcard routes in Angular? Why is it important in any application? Q236. What are URL Redirects in Angular? How can you set up redirects in the Angular? Q237. What is the pathMatch in Angular? What is the default value of the pathMatch? Q238. What is the difference between pathMatch and redirectTo in Angular? Q239. What is AppRoutingModule in Angular? What are the advantages of using a routing module? Q240. Does routing modules import order matter in Angular? Q241. What is the use of RouterOutlet in Angular? Q242. What is the difference between RouterLink vs. RouterLinkActive in Angular? Q243. Can you skip the Routing Module in Angular? Do we need a Routing Module always? Q244. What is the use of router.navigate in Angular? Q245. What is the Activated Route in Angular?

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Angular Interview Questions and Answers: Part 20

This is the 20th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q224. What are HttpInterceptors in Angular? Q225. What is the use of HTTPInterceptors in Angular? Q226. Can you add multiple interceptors in Angular? Q227. How can you register and use an interceptor for an entire application in Angular? Q228. What is Change Detection in Angular? What is the disadvantage or limitation of the Change Detection in Angular? Q229. What are the different ways to trigger the change detection in Angular? Q230. What are the possible data update scenarios for change detection? Q231. What is an Angular Router? What do you understand by the router imports? Q232. Where and how can you define the routing in the Angular application? Q233. What is the default order of the Route in Angular? Does route order matter in Angular? Q234. What are router links in Angular?

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Angular Interview Questions and Answers: Part 19

This is the 19th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q213. What is the difference between Observable and Subject in Angular? Q214. What is the difference between Multicasted Observables vs Unicasted Observables in Angular? Q215. What is multicasting in Angular? Q216. What is the difference between Multicasting vs. Publishing in Angular? Q217. How do you handle the errors of async operations in Angular? Q218. What are the different utility functions provided by the RxJS Library? Q219. What are the RxJs Operators in Angular? Q220. What are the different Observable creation functions in Angular? Q221. How can you create an observable from a promise? Q222. What is the use of the Map operator in Angular? Q223. What is the use of the Pipe operator in Angular?

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Angular Interview Questions and Answers: Part 18

This is the 18th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q203. What is RxJS in Angular? Q204. What is HttpClient in Angular? What are the advantages of using HttpClient? Q205. What does mean by subscribing and unsubscribing in RxJS? Q206. What is Promise in Angular? What are the different possible states of a Promise? Q207. What is Observable in Angular? What is the use of observable in Angular? Q208. What is Observer in Angular? How can you create an Observer? Q209. What is the difference between observable and observer in Angular? Q210. What will happen if you do not supply a handler for the Observer? Q211. What is the difference between Promises vs. Observables in Angular? Q212. What is an RxJS Subject in Angular?

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Angular Interview Questions and Answers: Part 17

This is the 17th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q194. How does Angular DI Framework Resolve the Dependencies? Q195. What is the difference between a Module Injector vs. an Element Injector? Q196. What is a Resolution Modifier in Angular? What are the different types of Resolution Modifiers? Q197. What is a DI token in Angular? Q198. What are the different Resolution Modifiers? Q199. What is a Type Token in Angular? Q200. What is a String Token in Angular DI? What is the main limitation of string tokens? Q201. What is an Injection Token in Angular? What is the difference between OpaqueToken vs InjectionToken? Q202. What is the forRoot() method in Angular? How it is different from forChild() method?

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Angular Interview Questions and Answers: Part 16

Q183. What is the providers array in Angular? What is the difference between provide and provider properties in Angular? Q184. What are the different types of providers in Angular? Q185. What is a Class Provider in Angular DI System? What is the purpose of useClass in Angular? Q186. What is a Value Provider in Angular DI System? What is the difference between Value Provider vs. Factory Provider in Angular? Q187. What is a Factory Provider in Angular DI System? What is the use of deps array in the Factory Provider of Angular? Q188. What is an Aliased Provider in Angular DI System? What is the difference between useExisting vs. useClass in Angular? Q189. Can you add multiple providers for the same DI token in Angular? How can you use multiple providers with the same token in Angular? Q190. What is the difference between multi-provider and regular provider in Angular? Q191. What is the difference between StaticProvider vs. Provider in Angular? Q192. What is the difference between the providers array vs. deps array for registering services in Angular? Q193. What is the difference between the Providers Array and viewProviders Array in Angular?

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Angular Interview Questions and Answers: Part 15

This is the 15th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q171. What is Angular Service? What is the difference between a component and a service? Q172. What is the difference between Injector, @Injectable, and @Inject in Angular? Q173. What are the different places to configure the Injectors? How do you configure injectors with providers at different levels? Q174. What is a provider in Angular DI? Q175. What is the scope of a service in Angular? Q176. How do you restrict a provider scope to a Module only? Q177. Can you share services using Modules in Angular? Q178. Why is the service provided in a feature module visible everywhere in the application? Q179. Why is the service provided in a lazy-loaded module visible only to that module? Q180. Why does lazy loading always create a child injector? Q181. How can you check and tell if a NgModule or service was previously loaded? Q182. What is the difference between the service() and factory() functions in Angular?

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Angular Interview Questions and Answers: Part 07

This is the 7th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q072. What are the Lifecycle Hooks of Angular? What is the execution sequence of it? Q073. How does an Angular application work? Q074. What is ngOnInit()? How is it defined? Q075. What is the difference between a constructor vs. ngOnInit() in Angular? Which one is executed first? Q076. What is Bootstrapping in Angular? What is a Bootstrapping module? Q077. What is the difference between manual vs. automatic bootstrapping in Angular? Q078. What is a bootstrapped component? Is it necessary for the bootstrapped component to be the entry component? Q079. What is the use of manual bootstrapping? How do you manually bootstrap an application? Q080. What is Webpack? What is the use of Webpack in Angular? Q081. What is Metadata in Angular? Q082. What are Annotations in Angular? Q083. What are Decorators in Angular?

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Angular Interview Questions and Answers: Part 06

This is the 6th part of the Angular Interview Questions and Answers Series. In this part we will discuss the answers of the following Angular Questions:

Q061. What is the difference between Angular vs React? What are the advantages of Angular over React? Q062. Why do we need the compilation process in Angular? Which compiler is used by Angular? Q063. What is JIT in Angular? How can you set JIT to be used in Angular compilation? Q064. What is an AOT in Angular? What are the different phases of the AOT process? Q065. What is the difference between AOT vs JIT in Angular? What are the advantages of AOT over JIT? Q066. How can you use cookies in Angular? How do you set, get, and clear cookies in Angular? Q067. What are the different module loading strategies in Angular applications? Q068. How can you use cookies in Angular? How do you set, get, and clear cookies in Angular? Q069. What is Lazy Loading in Angular? How do you implement Lazy Loading in Angular? Q070. What is the difference between Eager Loading vs. Lazy Loading in Angular? Q071. What is Preloading or Eager Lazy Loading in Angular? What is the difference between Pre Loading vs Lazy Loading?

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