Keyafe Interview Questions and Answers

Consisted of MCQ and one code

Q1. Explain the concept of oops in javascript
Ans. 
OOPs in JavaScript refers to the ability to create objects that have properties and methods.
• JavaScript supports OOPs concepts like inheritance, encapsulation, and polymorphism.

• Objects can be created using constructor functions or classes.

• Properties and methods can be added to objects using the 'this' keyword.

• Inheritance can be achieved using the 'prototype' property.

• Polymorphism can be achieved using method overriding ...read more
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Q2. Write the polyfill for reduce
Ans. 
Polyfill for reduce function
• Create a function that takes an array and a callback function as arguments

• Initialize an accumulator variable with the first element of the array

• Loop through the array starting from the second element and call the callback function with accumulator and current element as arguments

• Update the accumulator variable with the return value of the callback function

• Return the final value of the accumu...read more
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Q3. Explain closure
Ans. 
Closure is a function that has access to variables in its outer scope, even after the outer function has returned.
• Closure allows for data privacy and encapsulation in JavaScript.

• It is created when a function is defined inside another function.

• The inner function has access to the outer function's variables and parameters.

• Example: function outer() { let x = 10; function inner() { console.log(x); } return inner; } const c...read more
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Q1. Design an e commerce website
Ans. 
Design an e-commerce website
• Determine the target audience and their needs

• Choose a suitable platform for the website

• Create an intuitive and user-friendly interface

• Include features such as search, filters, and reviews

• Ensure secure payment and checkout processes

• Implement effective marketing strategies

• Provide excellent customer support
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Q2. What are the steps taken to secure your website
Ans. 
Steps taken to secure a website
• Use HTTPS protocol

• Implement strong password policies

• Regularly update software and plugins

• Use firewalls and intrusion detection systems

• Regularly backup data

• Implement two-factor authentication

• Conduct regular security audits
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