Date Validator — Implementation

Node.js Published Updated 0 Views Verified
Node.js Coding Challenge — Date Validator (Implementation). You are building a small JavaScript/Node.js utility. Write the function from scratch and return the requested value. Explain the logic briefly and provide runnable Node.js code. The solution must avoid accidental string-number concatenation and should behave predictably for normal input.
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Questions & Answers

Answer & Explanation

4 Answers
Verified Correct Answer

Correct Code / Solution

function validDate(y,m,d){const x=new Date(Date.UTC(y,m-1,d));return x.getUTCFullYear()===y&&x.getUTCMonth()===m-1&&x.getUTCDate()===d} console.log(validDate(2026,2,29));
Additional Explanation
This solution implements Date Validator using standard JavaScript/Node.js syntax. Keep numeric inputs as numbers, validate boundary cases when the problem requires it, and return a value from reusable functions instead of mixing calculation with output.
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Editorial Answer 1
Verified

Possible but Incorrect Code

function validDate(y,m,d){const x=new Date(Date.UTC(y,m-1,d));return x.getUTCFullYear()==y&&x.getUTCMonth()===m-1&&x.getUTCDate()===d} console.log(validDate(2026,2,29));
Additional Explanation
यह option जानबूझकर एक common bug/unsafe approach दिखाता है। इसे production solution के रूप में इस्तेमाल करने से पहले variable scope, async flow, module path, validation, error handling और security checks verify करें। ऊपर दिए गए correct option से exact difference compare करें.
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Editorial Answer 2
Verified

Possible but Incorrect Code

function validDate(y,m,d){const x=new Date(Date.UTC(y,m-1,d));return String(x.getUTCFullYear()===y&&x.getUTCMonth()===m-1&&x.getUTCDate()===d} console.log(validDate(2026,2,29));
Additional Explanation
यह option जानबूझकर एक common bug/unsafe approach दिखाता है। इसे production solution के रूप में इस्तेमाल करने से पहले variable scope, async flow, module path, validation, error handling और security checks verify करें। ऊपर दिए गए correct option से exact difference compare करें.
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Editorial Answer 3
Verified

Possible but Incorrect Code

function validDate(y,m,d){var x=new Date(Date.UTC(y,m-1,d));return x.getUTCFullYear()===y&&x.getUTCMonth()===m-1&&x.getUTCDate()===d} console.log(validDate(2026,2,29));
Additional Explanation
यह option जानबूझकर एक common bug/unsafe approach दिखाता है। इसे production solution के रूप में इस्तेमाल करने से पहले variable scope, async flow, module path, validation, error handling और security checks verify करें। ऊपर दिए गए correct option से exact difference compare करें.
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Editorial Answer 4