Infosys Web Designer & Frontend Developer Interview Questions and Answers

Q1. What is Pure function?
Ans. 
A pure function is a function that always produces the same output for the same input and has no side effects.
• Always returns the same output for the same input

• Does not modify any external state or variables

• No side effects, such as network requests or console logs

• Easier to test and reason about
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Q2. What is redux? Explain it with example
Ans. 
Redux is a predictable state container for JavaScript apps.
• Redux is a state management tool commonly used with React.

• It helps in managing the state of an application in a predictable way.

• Redux stores the state of the application in a single immutable state tree.

• Actions are dispatched to update the state, and reducers specify how the state changes in response to actions.

• Example: const initialState = { count: 0 }; const ...read more
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Q1. How to send the data from child to parent component?
Ans. 
Data can be sent from child to parent component in React by using callback functions.
• Use callback functions to pass data from child to parent component

• Define a function in the parent component and pass it as a prop to the child component

• Call the function in the child component with the data as an argument
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Q2. What is closure?
Ans. 
Closure is the combination of a function bundled together with references to its surrounding state.
• Closure allows a function to access variables from its outer scope even after the outer function has finished executing.

• It helps in maintaining state in functional programming.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }
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Attended the codevita competition in final year of college.

Q1. About College Project
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Q2. Some very basics of java
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Q3. Experience of college project as a team
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Q1. If you cleared Aptitude and Coding, Mostly Interview will be cleared with some basics questions like OOPs concepts, sort functions kind of questions.
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Q2. Explain OOPs concept in JAVA?
Ans. 
OOPs concept in JAVA is a programming paradigm that focuses on objects and their interactions.
• OOPs stands for Object-Oriented Programming

• It involves the use of classes, objects, inheritance, polymorphism, and encapsulation

• Classes are used to define objects and their properties

• Objects are instances of classes that can interact with each other

• Inheritance allows for the creation of new classes based on existing ones

• Polymo...read more
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Q3. Function to sort an array in Java?
Ans. 
Java provides Arrays.sort() method to sort an array.
• Use Arrays.sort() method to sort an array of strings.

• The method sorts the elements in ascending order by default.

• To sort in descending order, use Collections.reverseOrder() method.
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Q4. Tell me about yourself?
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Q5. Final year project which you worked on?
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Q1. Basic questions of java.
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Q1. Intro and other hr related questions.
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It's totally based on Basic understanding of concepts such as Linear arrangement, circular arrangement، blood relation, direction sense, ratio proportion, time, speed, distance

Q1. It's based on OOPS Concepts,
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Q2. Strength and weaknesses
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Q3. About yourself, about educational background, why should we hire you
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Entry level aptitude test

Q1. Introduction and about college project.
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