HCLTech Senior Software Engineer Interview Questions, Process, and Tips

Q1. C++, OOPS, STL, Find Error in Code Snippet
Ans. 
The question tests knowledge of C++, OOPS, and STL by asking to find errors in a code snippet.
• Check for syntax errors, such as missing semicolons or incorrect variable declarations.

• Look for logical errors, like incorrect usage of OOPS concepts or STL functions.

• Ensure proper memory management and error handling in the code snippet.
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Q1. Design Patterns
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Q1. Strength and Weekness
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Q1. What are pipes in Angular ?
Ans. 
Pipes in Angular are used for transforming data in templates.
• Pipes are used to format data before displaying it in the view.

• They can be used for currency, date, uppercase/lowercase transformations, etc.

• Pipes can be chained together for multiple transformations.

• Custom pipes can also be created for specific formatting needs.
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Q2. What is view encapsulation?
Ans. 
View encapsulation is a concept in web development where styles and templates are scoped to a specific component.
• View encapsulation helps prevent styles from leaking out of a component and affecting other parts of the application.

• It allows developers to create reusable components without worrying about style conflicts.

• Examples include Angular's encapsulation modes like Emulated, Shadow DOM, and None.
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Q1. What is the difference between AngularJS & angular 10
Ans. 
AngularJS is the first version of Angular, while Angular 10 is the latest version with significant improvements and updates.
• AngularJS is based on JavaScript, while Angular 10 is based on TypeScript.

• AngularJS uses controllers and $scope for data binding, while Angular 10 uses components and directives.

• AngularJS has two-way data binding, while Angular 10 has one-way data binding by default.

• AngularJS uses $http for AJAX r...read more
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Q2. What are interceptors
Ans. 
Interceptors are a design pattern commonly used in software development to capture and manipulate requests and responses.
• Interceptors can be used to add headers, log requests, modify responses, etc.

• In Angular, interceptors can be used to modify HTTP requests before they are sent to the server.

• In Spring framework, interceptors can be used to intercept client requests and server responses in a web application.
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Q3. What are services?
Ans. 
Services are self-contained, independent units of functionality that can be accessed programmatically.
• Services are typically used in a microservices architecture to break down a large application into smaller, manageable components.

• They can communicate with each other over a network, often using APIs like REST or gRPC.

• Examples of services include authentication services, payment services, and notification services.
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Q4. Data binding & communication between components
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Data binding allows components to communicate and share data in a web application.
• Data binding is a technique used in web development to synchronize data between the model and view components.

• Two-way data binding allows changes in the model to be reflected in the view and vice versa.

• Event binding can be used to trigger actions in response to user interactions.

• Angular and React are popular frameworks that provide data b...read more
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Q1. Why do you want to join HCL
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Q1. What is Routing in angular
Ans. 
Routing in Angular is the process of navigating between different components and views based on the URL.
• Routing is used to create single-page applications in Angular.

• It allows users to navigate between different views without reloading the entire page.

• Routes are defined in the app-routing.module.ts file.

• Routes can have parameters that can be accessed in the component using ActivatedRoute.

• The router-outlet directive is ...read more
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Q2. What is hoisting?
Ans. 
Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their scope.
• Hoisting applies to both variable and function declarations.

• Variables declared with 'let' and 'const' are not hoisted.

• Function expressions are not hoisted, only function declarations are hoisted.

• Hoisting can lead to unexpected behavior and should be avoided.
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Q3. What is javascript?
Ans. 
JavaScript is a programming language used to create interactive effects within web browsers.
• JavaScript is a client-side scripting language

• It is used to add interactivity to web pages

• It can manipulate HTML and CSS

• It can be used for server-side programming with Node.js

• It is often used in conjunction with libraries and frameworks like jQuery and React
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Q4. What is lifecycle?
Ans. 
Lifecycle refers to the stages of development and evolution of a product or system.
• Lifecycle includes planning, design, development, testing, deployment, and maintenance.

• It is a continuous process that involves feedback and improvement.

• Examples include software development lifecycle, product lifecycle, and project lifecycle.
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Q5. What is Directive?
Ans. 
A directive is a marker in AngularJS that tells the HTML compiler to attach a specified behavior to a DOM element.
• Directives are used to create custom HTML tags that serve as new, reusable widgets.

• They can be used to manipulate the DOM, add event listeners, and create two-way data bindings.

• Examples of built-in directives include ng-repeat, ng-model, and ng-show.

• Directives can be restricted to only apply to elements, at...read more
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Aptitude test will be quantitative, reasoning and technical skills in c, c++ and java programming

Q1. Techincal related stuffs which will related to your domain
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Q1. General enquires about you, working nature and ask salary package discussion
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Q1. What is dependency injection?
Ans. 
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Allows for easier testing by mocking dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection
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Q2. What is component?
Ans. 
A component is a reusable and independent part of a software system that performs a specific function.
• Components can be easily integrated into different parts of a system

• They promote reusability and modularity in software design

• Examples include buttons, input fields, and navigation bars in a web application
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