JTG E-Business Software Frontend Developer Intern Interview Questions, Process, and Tips

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
Ans. 
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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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"