With tech giants like Uber, Netflix, Google, Microsoft, and many more leveraging the power of JavaScript, front-end developers are expected to be well-versed in the language. JavaScript MCQs for front-end developers are a must-know for tech aspirants aiming for this role.
JavaScript is the most used programming language, with 63.61% of the developers using it worldwide. There are innumerable opportunities available for developers with JavaScript basics and advanced understanding, but still, extensive effort is required to grab a job as a front-end developer. A strong understanding of the fundamentals, JavaScript basics, and ES6 MCQs is a commonly recommended expert tip.
Aiding you in the process of landing your dream job at the top-tech company, developing confidence, going through MCQs, and revision is helpful. Thus, here we bring you a collection of the most asked JavaScript MCQs for front-end developers and JS interview questions.
JavaScript is a scripting language used in combination with CSS and HTML to create dynamic web pages. Also referred to as the building block of web development, it is used to develop mobile applications, too. The syntax of JavaScript is based on Java and C languages. Here are certain key features of JavaScript.
Understanding ES6
ECMAScript or ES is the standardized specification for scripting languages like JavaScript. JavaScript is an implementation of the ECMAScript specification. ES6, or ECMAScript 6, was the sixth version of the ECMAScript standard released in 2015. It provided certain key contributions to JavaScript, which include:
Strengthen your JavaScript basics with JS interview questions and ES6 MCQs:
Answer: The right answer to this JavaScript MCQ for front-end developers is ‘a’ – It is a constant
Answer: c. ‘let’
Answer: The right answer to this JavaScript MCQ for front-end developers is ‘c’ – 2
Answer: c. const
Answer: The right answer to this JavaScript MCQ for front-end developers is ‘a’ – Function
Answer: b. Interpretation
Answer: d. 40
<p id=”demo>Welcome to JavaScript Quiz</p>
Answer: d. document.getElementByID(“demoâ€).innerHTML = â€Hello Candidates!â€;
Answer: The right answer to this JavaScript MCQ for front-end developers is ‘c’ – Both and section
Answer: c. State that x and y are equal in type, value, and reference address
Answer: c. To create unique identifiers
Answer: The right answer to this JavaScript MCQ for front-end developers is ‘b’ – Initialization, testing, and updation
Answer: c. document.getElementById(“IK”).checked;
Answer: c. JavaScript is an open-standard scripting language, whereas JScript is a Microsoft implementation of JavaScript
Answer: b. 78
Answer: c. It applies a particular function to each element of the array it is called on and generates a new array containing the results of the function calls
Answer: d. Processes
Answer: a. pop()
Answer: a. Code organization into classes and objects
Answer: The right answer to this JavaScript MCQ for front-end developers is ‘d’ – All of the above
As JavaScript continues to remain the preferred programming language for developers, questions based on it are common during the interview. To clear the interview, you should know the JavaScript MCQs for front-end developers is important.
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Q1. How do I Turn on My JavaScript?
To activate JavaScript in the browser, open Chrome, head to settings, privacy and security, and select site setting. Now click JavaScript and select the sites that can use JavaScript.
Q2. Who Introduced JavaScript?
Brendan Eich invented JavaScript in 1995.
Q3. Why Won’t My JavaScript Work?
One of the common problems leading to the inability to run JavaScript is corrupted browser cookies or cache.
Q4. Is JavaScript Free and Open Source?
Yes, JavaScript is both free and open source to use.
Q5. Does JavaScript Need a Browser?
JavaScript can run both on web pages and on servers.
Q6. Is JavaScript Used in the Backend?
JavaScript is the common language used for both frontend and backend code.
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