Publicis Sapient Senior Associate Interview Questions, Process, and Tips

Q1. What is Hosting in JS? give one example
Ans. 
Hosting in JS refers to the behavior of variable declarations being moved to the top of their containing scope during the compilation phase.
• Variable declarations are 'hoisted' to the top of their scope, regardless of where the actual declaration occurs.

• Only the declarations are hoisted, not the initializations.

• Example: var x; console.log(x); var x = 5; // Output: undefined
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Q2. Explain design system in JS with one example
Ans. 
A design system in JS is a collection of reusable components and guidelines for consistent UI design.
• Design systems help maintain consistency and efficiency in UI development.

• Components in a design system can include buttons, forms, typography, etc.

• One example is Material-UI, a popular design system for React applications.
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Q3. What is debouncing and throttling in JS
Ans. 
Debouncing and throttling are techniques used in JavaScript to limit the number of times a function is called.
• Debouncing delays the execution of a function until a certain amount of time has passed without it being called again.

• Throttling limits the rate at which a function can be called, ensuring it is not called more than once within a specified time interval.
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Q4. Explain react life cycle
Ans. 
React life cycle refers to the series of methods that are invoked in the process of creating, updating, and destroying a component.
• Mounting phase: constructor, render, componentDidMount

• Updating phase: shouldComponentUpdate, render, componentDidUpdate

• Unmounting phase: componentWillUnmount
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Q5. What is pure component
Ans. 
A pure component is a component in thermodynamics that is made up of a single substance or chemical element.
• A pure component has a fixed chemical composition and distinct physical properties.

• It cannot be separated into simpler substances by physical means.

• Examples include water, oxygen, and gold.
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Q6. What is controlled and uncontrolled component
Ans. 
Controlled components are inputs whose value is controlled by React, while uncontrolled components are inputs whose value is controlled by the DOM.
• Controlled components are typically used in forms where the input value is controlled by React state.

• Uncontrolled components are often used for inputs that do not need to be controlled by React.

• Examples of controlled components include input fields with value and onChange pr...read more
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Q7. What is prototype in JS
Ans. 
Prototype in JS is an object that every function in JS has, which allows for inheritance and sharing of properties and methods.
• Prototype is an object that every function in JS has.

• It allows for inheritance and sharing of properties and methods.

• You can access an object's prototype using the __proto__ property.
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One exercise related to dashboard with sidebar navbar and table with pagination and API call

Q1. Thread questions
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Q2. Design patterns
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Q1. LLD Design of any popular ecommerce
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Q2. HLD Design of any popular ecommerce
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Questions related to Spring Boot/Junit/Messaging Queue/Microservices

Q1. Implement Observer Pattern
Ans. 
The Observer Pattern is a behavioral design pattern where an object (subject) maintains a list of dependents (observers) that are notified of any state changes.
• Create an interface for the observer with methods like update()

• Create a subject class with methods to add, remove, and notify observers

• Implement concrete observer classes that implement the observer interface

• When the state of the subject changes, notify all obse
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Q2. Implement Fork Join Framework
Ans. 
Fork Join Framework is a feature in Java for parallelizing tasks.
• ForkJoinPool class is used to create and manage ForkJoinTasks.

• ForkJoinTask class represents a task that can be forked and joined.

• Use fork() method to asynchronously execute a subtask.

• Use join() method to wait for the result of a subtask.
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Just an online test very easy as lost od time where given.

Q1. Never got start and intervire interviwer keep reshulding the interview many time even one time even after the start of the inter view interviewer never came to the interview call and latter got informed th...read more
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