JTG E-Business Software Frontend Developer Intern Interview Questions and Answers

2 DSA questions 1- in the frist question you have to print the length of maximum increasing sub array 2-in was related to stack, the question was to multiply string inside paranthesis for example if the input is "3(ab)" the output will be "ababab"

Q1. Event loop in JS
Ans. 
Event loop in JS manages asynchronous operations by executing callback functions in a queue.
• Event loop is responsible for handling asynchronous operations in JavaScript.

• It allows non-blocking I/O operations by executing callback functions in a queue.

• Event loop continuously checks the call stack and the callback queue to prioritize tasks.
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Q2. Type of JS modules
Ans. 
There are two types of JS modules: CommonJS and ES6 modules.
• CommonJS modules use 'require' and 'module.exports' to import and export modules.

• ES6 modules use 'import' and 'export' statements to import and export modules.

• ES6 modules are statically analyzable, while CommonJS modules are dynamically loaded at runtime.
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Q1. Sort the array using JS
Ans. 
Use the sort() method in JavaScript to sort an array of strings.
• Use the sort() method with a compare function to sort the array alphabetically.

• For example, array.sort((a, b) => a.localeCompare(b)); will sort the array in ascending order.

• To sort the array in descending order, you can use array.sort((a, b) => b.localeCompare(a));
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Q2. What is event bubbling
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Event bubbling is the process where an event triggered on a child element is propagated up to its parent elements.
• Events triggered on child elements will also trigger the same event on parent elements

• Event bubbling allows for delegation of event handling to a parent element

• Can be controlled using event.stopPropagation() method
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Q1. How does JS Work?
Ans. 
JS is a scripting language that allows for dynamic content on websites.
• JS is a client-side scripting language used to create interactive web pages.

• It can manipulate HTML and CSS to dynamically update content without reloading the page.

• JS can handle events like button clicks, form submissions, and mouse movements.

• It can also make asynchronous requests to fetch data from servers using AJAX.

• JS code is executed by the brow...read more
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Q2. Reverse an array in JS ?
Ans. 
Use the reverse() method to reverse an array in JavaScript.
• Use the reverse() method on the array to reverse its elements in place.

• Example: const arr = ['apple', 'banana', 'cherry']; arr.reverse(); // ['cherry', 'banana', 'apple']
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