Front End Developer Intern Interview Questions

12,597 front end developer intern interview questions shared by candidates

HTML & CSS: Explain the difference between block, inline, and inline-block display properties. How do you create a responsive website? Explain different techniques like media queries, flexbox, and Grid. What are the advantages of using CSS preprocessors like Sass or Less? How do you optimize your CSS code for performance? JavaScript: Explain the difference between var, let, and const. What are closures, and how do they work in JavaScript? Describe the difference between synchronous and asynchronous JavaScript. What is the Event Loop in JavaScript? What are the benefits of using a JavaScript framework like React, Angular, or Vue.js? Explain the concept of "Single Page Application" (SPA).
avatar

Front End Developer

Interviewed at Express Employment Professionals

3.7
Sep 18, 2024

HTML & CSS: Explain the difference between block, inline, and inline-block display properties. How do you create a responsive website? Explain different techniques like media queries, flexbox, and Grid. What are the advantages of using CSS preprocessors like Sass or Less? How do you optimize your CSS code for performance? JavaScript: Explain the difference between var, let, and const. What are closures, and how do they work in JavaScript? Describe the difference between synchronous and asynchronous JavaScript. What is the Event Loop in JavaScript? What are the benefits of using a JavaScript framework like React, Angular, or Vue.js? Explain the concept of "Single Page Application" (SPA).

What this this & self was the question. var myObject = { foo: "bar", func: function() { var self = this; console.log("1outer func: this.foo = " + this.foo); console.log("1outer func: self.foo = " + self.foo); var baz = (() => { debugger; console.log("2inner func baz: this.foo = " + this.foo); // myObject console.log("2inner func baz: self.foo = " + self.foo); // myObject }); (function() { debugger; console.log("3inner func: this.foo = " + this.foo); // undefined console.log("3inner func: self.foo = " + self.foo); // myObject }()); return baz; } };
avatar

Front End Developer

Interviewed at Disney+ Hotstar

3.5
Oct 16, 2019

What this this & self was the question. var myObject = { foo: "bar", func: function() { var self = this; console.log("1outer func: this.foo = " + this.foo); console.log("1outer func: self.foo = " + self.foo); var baz = (() => { debugger; console.log("2inner func baz: this.foo = " + this.foo); // myObject console.log("2inner func baz: self.foo = " + self.foo); // myObject }); (function() { debugger; console.log("3inner func: this.foo = " + this.foo); // undefined console.log("3inner func: self.foo = " + self.foo); // myObject }()); return baz; } };

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