Angular Interview Question Answers Practice Questions & Worked Solutions

Q1 Medium • TCS, Infosys

What is angular?

A Angular is an Open-Source front end web framework

B Angular is an Back-end end web framework

C Angular is a Low level programming language

D Angular is a framework developed for Robots

Q2 Medium • TCS, Infosys

What are Advantages are Angular?

A Low Memory usage Free data access Strict programming structure Server and client communication support

B Angular Supports two-way data-binding Angular Follows MVC patte architecture It supports Static and Angular Template. Custom directive support Client and server communication

C Angular supports web-framework Dynamic template support No custom directive support Difficult to trace errors

D Event handlers are difficult to use controlled memory leaks Custom Directive support MVC Patte Architecture support

Q3 Medium • TCS, Infosys

Angular mainly used for?

A Webframe work used for web site developments

B Robotic AI development

C Database intensive application development

D Typically Angular is used for Development of Single Page Applications (SPA) with its read-to-use modules single page application development is simplified.

Q4 Medium • TCS, Infosys

What are Angular Expressions?

A Expressions are used to writing some comments in the code for future reference.

B Angular expressions are used for expressing code logic

C Angular expressions are code snippets that are placed with two parenthesis open and closing side. Ex: {{expression }}. These expressions are used to bind application data to HTML

D Angular expressions are used in code to let the data do its own task.

Q5 Medium • TCS, Infosys

What is String interpolation?

A In Angular String interpolation is combining multi strings for displaying data

B A special syntax that uses template expressions within double parenthesis {{ }} for displaying the component data is String interpolation in Angular

C String interpolation is used in double {{ }} brackets for string manipulation

D String interpolation in angular is a expression

Q6 Medium • TCS, Infosys

What is Scope in Angular?

A Application model that lets the data view control the application controller

B Scope binding of data between code and html view

C Scope of the variable declaration in Angular

D It refers to a application model, Scope acts like a glue between application controller and the view.

Q7 Medium • TCS, Infosys

What are Directives in Angular?

A A Directive in Angular is something that introduces a new syntax

B Directive for New Data Declaration

C A Directive in Angular is something that introduces new framework

D Directive in angular is a new data type.

Q8 Medium • TCS, Infosys

What are Controllers in Angular?

A Controllers in angular are data that is used in HTML UI

B A Logic that controllers provide in Angular but have no way to control data flow

C Controllers are functions which provide data and logic to the HTML UI. They control how data flows from Server to HTML UI

D Data flows independently without the intervention of Angular Controllers

Q9 Medium • TCS, Infosys

What is Angular Injector?

A An angular injector can be used to inject new code at run time.

B Injectors are useful for locating the services and providing data binding.

C Used for injecting data for different modules.

D An Angular injector is a service location, used to retrieve object instances as defined by provider, instantiate types, invoke methods and load modules.

Q10 Medium • TCS, Infosys

What is Data binding in Angular?

A Data binding that allows communication between Component and DOM (Document object Model) There 4 forms of data binding. a. String interpolation b. Property binding c. Event binding. d. Two-way Data binding.

B Data binding is process of not letting the data move from one part of the code to other

C Data binding allows programmers to let the data and program logic be independent and communicate on their own.

D Just a way to tie up the data and not let any programming code access it.

Q11 Medium •

In modern Angular, where does a standalone component declare the template dependencies it uses, such as other standalone components and pipes?

A In the imports array of the @Component decorator

B In the declarations array of an NgModule

C In a browser cookie

D In an AngularJS $scope object

Q12 Easy

In modern Angular, which lifecycle hook runs once after a component’s initial inputs have been initialized?

A ngOnInit

B ngOnDestroy

C ngDoCheck

D ngAfterViewChecked

Q13 Easy

In Angular reactive forms, which class represents the value and validation state of one form field?

A FormControl

B FormGroup

C FormArray

D ElementRef

Q14 Easy

Given const count = signal(2); in modern Angular, which expression reads its current value?

A count()

B count.getValue()

C count.value

D count[]

Q15 Medium

What does Angular’s AsyncPipe do when the view using it is destroyed?

A It automatically retries every failed observable forever.

B It prevents all future HTTP requests in the application.

C It unsubscribes from its subscribed observable.

D It converts every observable into a global singleton.

Q16 Medium

Two independent subscriptions are made to the same unshared HttpClient.get observable in Angular. What normally happens?

A No request starts because observables cannot perform I/O.

B Each subscription initiates its own HTTP request.

C Both subscriptions are guaranteed to share one request.

D The second subscription is rejected by Angular.

Q17 Medium

A modern Angular search uses an RxJS stream of queries. Which operator switches to the newest inner request and unsubscribes from the previous one?

A exhaustMap

B switchMap

C mergeMap

D concatMap

Q18 Medium

In Angular’s @for block, why should track normally use a stable unique item identifier for a reorderable list?

A It lets Angular associate rendered DOM nodes with the same records across reordering, minimizing DOM churn.

B It encrypts the records before rendering.

C It removes the need for unique identifiers in the data.

D It creates a two-way binding on all list items.

Q19 Medium

Why must an API still enforce authorization when an Angular route has a client-side access guard?

A Client code can be bypassed by sending direct HTTP requests or modifying JavaScript in the browser.

B The browser can certify the user’s permission for any resource.

C A guard automatically encrypts every database row.

D Guards can run only after a database write.

Q20 Hard

An Angular component declares a service in its own providers metadata. What is the normal lifetime scope for that provider relative to multiple component instances?

A Every application on the page must share one instance.

B The provider exists only during compilation.

C Each component instance can have its own service instance from its element injector.

D The provider is always recreated for every template expression.

Angular Interview Question Answers Practice Questions (20)