From 39194f5496b9f1edf4be452d5fbbbfcc73e85517 Mon Sep 17 00:00:00 2001
From: Zaira <33151350+zairahira@users.noreply.github.com>
Date: Mon, 22 Dec 2025 19:21:01 +0500
Subject: [PATCH] feat(curriculum): NodeJS core modules quiz (#64105)

Co-authored-by: majestic-owl448 <26656284+majestic-owl448@users.noreply.github.com>
---
 client/i18n/locales/english/intro.json        |   6 +
 .../quiz-node-js-core-modules/index.md        |   9 +
 .../692487767b6b728454f53f29.md               | 454 ++++++++++++++++++
 .../blocks/quiz-node-js-core-modules.json     |  14 +
 .../back-end-development-and-apis-v9.json     |   2 +-
 5 files changed, 484 insertions(+), 1 deletion(-)
 create mode 100644 client/src/pages/learn/back-end-development-and-apis-v9/quiz-node-js-core-modules/index.md
 create mode 100644 curriculum/challenges/english/blocks/quiz-node-js-core-modules/692487767b6b728454f53f29.md
 create mode 100644 curriculum/structure/blocks/quiz-node-js-core-modules.json

diff --git a/client/i18n/locales/english/intro.json b/client/i18n/locales/english/intro.json
index 0924f55394a..093b89c82b2 100644
--- a/client/i18n/locales/english/intro.json
+++ b/client/i18n/locales/english/intro.json
@@ -7317,6 +7317,12 @@
           "Review relational databases concepts to prepare for the exam."
         ]
       },
+      "quiz-node-js-core-modules": {
+        "title": "NodeJS Core Modules Quiz",
+        "intro": [
+          "Test what you've learned about Node.js core modules with this quiz."
+        ]
+      },
       "exam-relational-databases-certification": {
         "title": "Relational Databases Certification Exam",
         "intro": [
diff --git a/client/src/pages/learn/back-end-development-and-apis-v9/quiz-node-js-core-modules/index.md b/client/src/pages/learn/back-end-development-and-apis-v9/quiz-node-js-core-modules/index.md
new file mode 100644
index 00000000000..c41c634b3e8
--- /dev/null
+++ b/client/src/pages/learn/back-end-development-and-apis-v9/quiz-node-js-core-modules/index.md
@@ -0,0 +1,9 @@
+---
+title: Introduction to the NodeJS Core Modules Quiz
+block: quiz-node-js-core-modules
+superBlock: back-end-development-and-apis-v9
+---
+
+## Introduction to the NodeJS Core Modules Quiz
+
+This page is for the NodeJS Core Modules Quiz
diff --git a/curriculum/challenges/english/blocks/quiz-node-js-core-modules/692487767b6b728454f53f29.md b/curriculum/challenges/english/blocks/quiz-node-js-core-modules/692487767b6b728454f53f29.md
new file mode 100644
index 00000000000..2c301f191a5
--- /dev/null
+++ b/curriculum/challenges/english/blocks/quiz-node-js-core-modules/692487767b6b728454f53f29.md
@@ -0,0 +1,454 @@
+---
+id: 692487767b6b728454f53f29
+title: NodeJS Core Modules Quiz
+challengeType: 8
+dashedName: quiz-node-js-core-modules
+---
+
+# --description--
+
+To pass the quiz, you must correctly answer at least 18 of the 20 questions below.
+
+# --quizzes--
+
+## --quiz--
+
+### --question--
+
+#### --text--
+
+Which `fs` method adds content to an existing file without overwriting it?
+
+#### --distractors--
+
+`writeFile()`
+
+---
+
+`readFile()`
+
+---
+
+`unlink()`
+
+#### --answer--
+
+`appendFile()`
+
+### --question--
+
+#### --text--
+
+What happens when you use synchronous methods from the `fs` module?
+
+#### --distractors--
+
+They delete existing files automatically.
+
+---
+
+They run faster than asynchronous ones in all cases.
+
+---
+
+They return Promises by default.
+
+#### --answer--
+
+They block the program until the operation finishes.
+
+### --question--
+
+#### --text--
+
+What does the `utf8` parameter do in `fs.readFile()`?
+
+#### --distractors--
+
+It prevents errors from being thrown.
+
+---
+
+It changes the file’s extension.
+
+---
+
+It compresses large files.
+
+#### --answer--
+
+It tells Node to return a readable string instead of a buffer.
+
+### --question--
+
+#### --text--
+
+Which `Buffer` method creates a new buffer filled with zeros?
+
+#### --distractors--
+
+`Buffer.from()`
+
+---
+
+`Buffer.concat()`
+
+---
+
+`Buffer.byteLength()`
+
+#### --answer--
+
+`Buffer.alloc()`
+
+### --question--
+
+#### --text--
+
+What does `Buffer.toString()` do?
+
+#### --distractors--
+
+Converts a buffer into binary code.
+
+---
+
+Clears the contents of a buffer.
+
+---
+
+Shows buffer byte length.
+
+#### --answer--
+
+Converts buffer contents into a readable string.
+
+### --question--
+
+#### --text--
+
+Which `crypto` feature requires a private key to generate a signature?
+
+#### --distractors--
+
+`createHash()`
+
+---
+
+`createCipheriv()`
+
+---
+
+`randomBytes()`
+
+#### --answer--
+
+`sign()`
+
+### --question--
+
+#### --text--
+
+Why should you avoid writing your own crypto algorithms directly?
+
+#### --distractors--
+
+It is illegal in Node.js applications.
+
+---
+
+Node.js does not support encryption.
+
+---
+
+JavaScript cannot compute hashes.
+
+#### --answer--
+
+It can be unsafe without well-tested libraries.
+
+### --question--
+
+#### --text--
+
+What `crypto` method is recommended for generating secure random tokens instead of `Math.random()`?
+
+#### --distractors--
+
+`randomInt()`
+
+---
+
+`createHmac()`
+
+---
+
+`createCipheriv()`
+
+#### --answer--
+
+`randomBytes()`
+
+### --question--
+
+#### --text--
+
+Which OS module method returns the CPU architecture?
+
+#### --distractors--
+
+`os.cpus()`
+
+---
+
+`os.platform()`
+
+---
+
+`os.version()`
+
+#### --answer--
+
+`os.arch()`
+
+### --question--
+
+#### --text--
+
+What does `os.userInfo()` return?
+
+#### --distractors--
+
+Only the username.
+
+---
+
+Only the device IP address.
+
+---
+
+Only the logged-in user’s ID.
+
+#### --answer--
+
+Information about the current system user.
+
+### --question--
+
+#### --text--
+
+Which `path` method joins segments and normalizes extra slashes?
+
+#### --distractors--
+
+`path.resolve()`
+
+---
+
+`path.extname()`
+
+---
+
+`path.dirname()`
+
+#### --answer--
+
+`path.join()`
+
+### --question--
+
+#### --text--
+
+Which `path` method produces an absolute path based on the current working directory?
+
+#### --distractors--
+
+`path.extname()`
+
+---
+
+`path.format()`
+
+---
+
+`path.parse()`
+
+#### --answer--
+
+`path.resolve()`
+
+### --question--
+
+#### --text--
+
+What does the global variable `__dirname` represent?
+
+#### --distractors--
+
+The name of the user running Node.
+
+---
+
+The current file’s extension.
+
+---
+
+A relative folder path starting with `./`.
+
+#### --answer--
+
+The absolute path of the directory containing the current file.
+
+### --question--
+
+#### --text--
+
+Which process property contains environment variables like `NODE_ENV`?
+
+#### --distractors--
+
+`process.cwd`
+
+---
+
+`process.version`
+
+---
+
+`process.platform`
+
+#### --answer--
+
+`process.env`
+
+### --question--
+
+#### --text--
+
+What does the `process.on("exit")` event do?
+
+#### --distractors--
+
+It restarts the Node application.
+
+---
+
+It sends an `exit` signal to child processes.
+
+---
+
+It clears the event loop queue.
+
+#### --answer--
+
+Executes code right before the Node process finishes.
+
+### --question--
+
+#### --text--
+
+Which stream type can both read and write data but does not transform it?
+
+#### --distractors--
+
+Readable stream
+
+---
+
+Transform stream
+
+---
+
+Writable stream
+
+#### --answer--
+
+Duplex stream
+
+### --question--
+
+#### --text--
+
+What is required to implement reading and writing of large files efficiently?
+
+#### --distractors--
+
+Using only `Buffer.alloc()`
+
+---
+
+Importing the `crypto` module
+
+---
+
+Saving the entire file in memory first
+
+#### --answer--
+
+Using streams to process data in chunks
+
+### --question--
+
+#### --text--
+
+Which method links a readable stream to a writable stream?
+
+#### --distractors--
+
+`pipeTo()`
+
+---
+
+`connect()`
+
+---
+
+`streamWrite()`
+
+#### --answer--
+
+`pipe()`
+
+### --question--
+
+#### --text--
+
+What stream event indicates there is no more data to write?
+
+#### --distractors--
+
+`close`
+
+---
+
+`drain`
+
+---
+
+`end`
+
+#### --answer--
+
+`finish`
+
+### --question--
+
+#### --text--
+
+What is logged if you print a chunk from a readable stream without `toString()`?
+
+#### --distractors--
+
+Plain text content
+
+---
+
+The process PID
+
+---
+
+Operating system name
+
+#### --answer--
+
+A buffer object with binary data
diff --git a/curriculum/structure/blocks/quiz-node-js-core-modules.json b/curriculum/structure/blocks/quiz-node-js-core-modules.json
new file mode 100644
index 00000000000..bec8e4e87da
--- /dev/null
+++ b/curriculum/structure/blocks/quiz-node-js-core-modules.json
@@ -0,0 +1,14 @@
+{
+  "name": "NodeJS Core Modules Quiz",
+  "isUpcomingChange": true,
+  "dashedName": "quiz-node-js-core-modules",
+  "helpCategory": "Backend Development",
+  "challengeOrder": [
+    {
+      "id": "692487767b6b728454f53f29",
+      "title": "NodeJS Core Modules Quiz"
+    }
+  ],
+  "blockLabel": "quiz",
+  "blockLayout": "link"
+}
diff --git a/curriculum/structure/superblocks/back-end-development-and-apis-v9.json b/curriculum/structure/superblocks/back-end-development-and-apis-v9.json
index 0d3ce0600ee..3fd292b8908 100644
--- a/curriculum/structure/superblocks/back-end-development-and-apis-v9.json
+++ b/curriculum/structure/superblocks/back-end-development-and-apis-v9.json
@@ -16,7 +16,7 @@
         {
           "dashedName": "nodejs-core-modules",
           "comingSoon": true,
-          "blocks": []
+          "blocks": ["quiz-node-js-core-modules"]
         },
         {
           "dashedName": "node-package-manager",