HCL Angular interview questions 2025
HCL Angular Interview Questions (6+ Years Experience) — Complete Guide for 2025
If you're preparing for an HCL Angular interview, especially with 6+ years of experience, you're likely to face questions that test your JavaScript fundamentals, Angular framework expertise, project architecture knowledge, and real-time problem-solving.
In this article, we will walk you through commonly asked HCL Angular Interview Questions, covering JavaScript, CSS, and Angular—tailored for experienced candidates aiming for lead roles.
🔍 Introduction + Project Explanation (Banking Domain + Lead Experience)
Expect to start with a self-introduction followed by project details. If you're from a banking domain, highlight:
Project Scope: Core banking platforms, payment gateways, customer onboarding, etc.
Tech Stack: Angular 14+, NgRx, REST APIs, RxJS, Micro Frontends.
Role: Led a team of 4-6 developers, handled branching strategies (Gitflow), conducted code reviews, and implemented CI/CD pipelines.
🧠 JavaScript Interview Questions
1. Explain Hoisting and Closure
Hoisting: Variables and functions are moved to the top of their scope during compilation.
Closure: A function that retains access to its parent scope even after the parent has closed.
2. Event Loop, Call Stack, Macro & Micro Stack
Call Stack: Executes functions in LIFO order.
Event Loop: Monitors the call stack and callback queues.
Macro Tasks: setTimeout, setInterval.
Micro Tasks: Promises, MutationObserver — executed before macro tasks.
3. What is Prototype
Every JavaScript object has a prototype. Prototypes allow inheritance of methods and properties.
4. var, let and const Difference
var: Function-scoped, hoisted.
let: Block-scoped, not hoisted.
const: Block-scoped, immutable binding.
5. How Scope Is Determined in JavaScript
JavaScript uses lexical scope, meaning scope is defined at compile time based on code structure.
6. Pure Function, Call, Apply, Bind, Currying
Pure Function: Returns same output for same input, no side effects.
Call/Apply: Set this and invoke immediately.
Bind: Set this, returns new function.
Currying: Break function with multiple arguments into series of unary functions.
7. Async/Await in JavaScript
Syntactic sugar over Promises, allows writing async code like sync.
8. How to Chain Multiple Promises
js
doTask1()
.then(doTask2)
.then(doTask3)
.catch(handleError);
CSS Interview Questions
Position, Semantic Elements, Accessibility, Bootstrap Grid
Position: static, relative, absolute, fixed, sticky.
Semantic Elements: <header>, <footer>, <article> – improve SEO and accessibility.
Accessibility: Use ARIA roles, keyboard navigation, alt text.
Bootstrap Grid: 12-column responsive layout using rows and columns.
Angular Interview Questions
1. Decorators in Angular
Metadata attached to classes like @Component, @Injectable, @Input, @Output.
2. What is Module in Angular
A container for components, services, pipes, and other modules. Defined using @NgModule.
3. angular.json, package.json, main.ts, tsconfig
angular.json: Project structure, build settings.
package.json: Dependencies & devDependencies.
main.ts: Entry point.
tsconfig.json: TypeScript compiler options.
4. Use of ngAfterViewInit and ngOnDestroy, ngDoCheck
ngAfterViewInit: DOM initialized.
ngOnDestroy: Cleanup logic.
ngDoCheck: Custom change detection.
5. Use of Services Beyond API Calls
Business logic, state management, shared utility methods, caching, etc.
6. Communicating Between Non-Related Components
Use Services with Subjects/BehaviorSubjects, or a state management library like NgRx.
7. Alternative to HttpClient
Use fetch API, GraphQL, or third-party libraries like axios.
8. Filter Nested Data From API Response
Use RxJS operators like map, or plain JavaScript:
const item = response.nestedData.find(x => x.id === desiredId);
9. How to Implement Caching in Angular
Use RxJS shareReplay(), or localStorage/sessionStorage, or caching interceptors.
10. Steps to Improve Angular App Performance
Lazy loading modules
OnPush change detection
AOT compilation
TrackBy in *ngFor
Bundle optimization
11. NgRx Setup and Usage
Setup: Install packages, define actions, reducers, selectors.
Use Case: Manage complex state (e.g., user profile, authentication) in large applications.
12. New Features in Angular 17–20 v17: Built-in control flow (@if, @for), standalone components.
v18: Signals support, image directives.
v19: Faster hydration, improved SSR.
v20: Zone-less app support, improved diagnostics.
13. Standalone Components vs Module-Based Structure
Standalone simplifies bootstrapping and tree-shaking.
Useful for micro frontends or small apps.
Modules still valid for large enterprise-level apps needing structured dependency injection.
📌 Conclusion
Interviewing at HCL as a Senior Angular Developer (6+ years) requires a balanced grasp of core JavaScript, Angular internals, and real-world application architecture. Focus on project leadership, state management, performance tuning, and latest Angular features to stand out.
Keywords:
HCL Angular interview questions 2025, Angular senior developer interview, Angular 17 features, Angular performance tips, NgRx implementation, JavaScript closures, CSS position, Standalone Angular components.
Read more :
0 Comments