Shalom ERP Front end Developer Interview Questions and Answers

Q1. Js basics like var, let and const
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Q2. Angular basic questions
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Q1. Introduce yourself
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Q1. What are semantic elements in HTML?
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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>, <...read more
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Q2. Difference between html5 and html?
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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?
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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
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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
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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,
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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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2 moderate DSA questions and a Question on React on Api's to fetch data

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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?
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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. Array linked list queue
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