Prepare for your frontend developer interview with 30 beginner-level MCQs on HTML, CSS, and JavaScript. Each question includes 4 options, the correct answer, and a detailed explanation to help you learn faster and score better.
📅 Published May 28, 2026 🔄 Updated May 28, 2026 ⏱️1 min read👁3 views
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Q1 What does HTML stand for?
Q2 Which HTML tag is used to define the largest heading?
Q3 Which attribute provides alternative text for an image?
Q4 Which tag is used to create a hyperlink in HTML?
Q5 What is the correct HTML element for inserting a line break?
Q6 Which HTML element defines an unordered list?
Q7 What does the DOCTYPE declaration do in HTML?
Q8 Which input type creates a checkbox in a form?
Q9 Which HTML tag defines a table row?
Q10 What is the purpose of <meta charset="UTF-8">?
Q11 What does CSS stand for?
Q12 Which CSS property changes the text color of an element?
Q13 What is the CSS Box Model made up of?
Q14 Which CSS property is used to make text bold?
Q15 How do you center a block element horizontally using CSS?
Q16 Which value of the position property removes an element from the normal document flow?
Q17 What does display: flex do to a container?
Q18 Which CSS unit is relative to the font size of the root element?
Q19 Which CSS property controls the space inside an element, between content and border?
Q20 How do you apply a CSS style to all <p> elements on a page?
Q21 Which keyword declares a variable that cannot be reassigned in modern JavaScript?
Q22 What will typeof null return in JavaScript?
Q23 Which method adds an element to the end of a JavaScript array?
Q24 What is the difference between == and === in JavaScript?
Q25 How do you write a single-line comment in JavaScript?
Q26 What does console.log() do?
Q27 How do you select an HTML element by its ID using JavaScript?
Q28 What does the return statement do inside a function?
Q29 Which of the following correctly defines an arrow function in JavaScript?
Q30 What is an event listener in JavaScript used for?
