Correct answer: The first element. Array indices start at 0 in JavaScript.

Programming MCQ

Correct answer: === compares without type conversion surprises. Strict equality avoids JavaScript's confusing implicit type coercion.

Correct answer: 0, '', null, undefined, NaN. These values behave as false in conditions — a frequent source of bugs.

Correct answer: undefined. Absent an explicit return, functions return undefined.

Correct answer: filter. filter selects elements; map transforms them; reduce accumulates.

HTML, CSS, JavaScript, PHP and MySQL programming questions.

Q21. Why prefer === over == ? Medium

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Q22. Which values are falsy in JavaScript? Medium

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Q23. A function without a return statement returns: Medium

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Q24. marks[0] accesses: Medium

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Q25. Which array method creates a new array with only elements passing a test? Medium

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Q26. student.name accesses: Medium

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Q27. document.querySelector('.btn') selects: Medium

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Q28. The safe property for inserting user-provided text into the page is: Medium

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Q29. event.preventDefault() inside a form submit handler: Medium

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Q30. The standard interactive-page pattern is: Medium

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