Simplotel Technologies Front end Developer Interview Questions and Answers

Basic angular questions like-lazy loading, == === operator etc

Q1. Map function , hashmap
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Logical, Problem solving

Q1. Self introduction
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Q2. General Questions
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Q3. Technical questions
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Reasoning logocial thing topics

Coding text web developer development

HTML CSS javascript DSA corejava

Java programming HTML tags DSA algorithms

Q1. Angular upgrade steps
Ans. 
Angular upgrade steps involve checking compatibility, updating dependencies, and testing thoroughly.
• Check compatibility with Angular version being upgraded to

• Update dependencies in package.json file

• Run ng update command to automatically update Angular dependencies

• Test thoroughly to ensure all features work as expected after upgrade
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Q2. Typescript related questions
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Q1. Salary discussion
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Q1. What are closures with examples ?
Ans. 
Closures are functions that have access to their own scope, as well as the scope in which they were defined.
• Closures allow functions to access variables from their outer function even after the outer function has finished executing.

• Closures are commonly used in event handlers and callbacks.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }
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Q2. How to get updated content on scroll on e-commerce app?
Ans. 
Use infinite scrolling to fetch new content as user scrolls down the page.
• Implement infinite scrolling to load more products as user scrolls down

• Make AJAX calls to fetch new content from the server

• Update the DOM with the new content dynamically
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Q1. What are semantic elements in HTML?
Ans. 
Semantic elements in HTML provide meaning to the content, making it easier for search engines and screen readers to interpret.
• Semantic elements are HTML tags that clearly define the content they wrap.

• They provide structure and meaning to the content, making it more accessible and SEO-friendly.

• Examples include <header>, <footer>, <nav>, <article>, <section>, <aside>, <main>, <
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Q2. Difference between html5 and html?
Ans. 
HTML5 is the latest version of HTML with new features and improvements.
• HTML5 supports new elements like <header>, <footer>, <nav>, <article>, <section> etc.

• HTML5 supports new input types like email, url, date, range, color etc.

• HTML5 supports new APIs like Geolocation, Web Storage, Web Workers, Canvas, Audio/Video etc.
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Q1. How to pass data in components using Vue js and react js?
Ans. 
Data can be passed in components using props in Vue.js and React.js.
• In Vue.js, data can be passed down to child components using props.

• In React.js, data can be passed down to child components using props as well.

• In Vue.js, props are defined in the parent component and passed down to the child component.

• In React.js, props are passed down from parent to child components as attributes.
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Q1. Hoisting concept with examples and guess the output
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope.
• Variable declarations are hoisted but not their initializations.

• Function declarations are fully hoisted.

• Example: console.log(myVar); var myVar = 10; // Output: undefined

• Example: console.log(myFunc()); function myFunc() { return 'Hello!'; } // Output: Hello!
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Q2. Map functionality with a call back function
Ans. 
Using map function to apply a callback function to each element in an array
• Map function is used to iterate over an array and apply a callback function to each element

• The callback function can perform operations on each element and return a new value

• Example: arr.map(item => item * 2) will double each element in the array
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Q3. Copy object, spread operator usage . Deep copy, sallow copy
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Q4. Flexbox vs grid, dom, box model,
Ans. 
Flexbox is best for one-dimensional layouts, Grid is best for two-dimensional layouts, DOM is the structure of a webpage, Box model is the layout of elements.
• Flexbox is best for creating one-dimensional layouts like navigation bars or sidebars.

• Grid is best for creating two-dimensional layouts like grids of images or cards.

• DOM (Document Object Model) is the structure of a webpage, representing the elements as objects.

• Bo...read more
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Q5. React optimization, why React,
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