Node.js Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to Node.js Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Q 1 - Which of the following is true about Node.JS?

A - Node.js is a JavaScript based framework/platform built on Google Chrome's JavaScript V8 Engine.

B - Node.JS is used to delevop I/O intensive web applications like video streaming sites, single page applications and other web application.

C - Node.js is open source and is completely free to use.

D - All of the above.

Answer : D

Explanation

Node.js is a very powerful JavaScript based framework/platform built on Google Chrome's JavaScript V8 Engine. It is used to delevop I/O intensive web applications like video streaming sites, single page applications and other web application. Node.js is open source, completely free, and used by thousands of developers around the world.

Q 2 - Which of the following command will show version of npm?

A - $ npm --version

B - $ node --version

C - $ npm getVersion

D - $ node getVersion

Answer : A

Explanation

Executing $ npm --version command will show the version of npm instance.

Q 3 - Which of the following code gets length of a buffer buf?

Answer : A

Explanation

buf.length returns size of a node buffer in bytes.

Q 4 - Which method of fs module is used to write a file?

A - fs.write(path, flags[, mode], callback)

B - fs.writeFile(path, flags[, mode], callback)

C - fs.writePath(path, flags[, mode], callback)

D - None of the above.

Answer : B

Explanation

fs.writeFile(path, flags[, mode], callback) is the method which is used to write a file.

Q 5 - Which of the following is true about __dirname global object?

A - The __dirname represents the name of the directory that the currently executing script resides in.

B - The __dirname represents the resolved absolute path of code file.

C - Both of the above.

D - None of the above.

Answer : A

Explanation

The __dirname represents the name of the directory that the currently executing script resides in.

Q 6 - Which of the following code prints process version?

A - console.log('Current version: ' + process.version());

B - console.log('Current version: ' + process.version);

C - console.log('Current version: ' + process.getVersion());

D - None of the above.

Answer : B

Explanation

process.version can be used to get the current process version.

Q 7 - Which of the following code print the platform of operating system?

A - console.log('platform : ' + os.platform);

B - console.log('platform : ' + os.platform());

C - console.log('platform : ' + os.getPlatform());

D - None of the above.

Answer : B

Explanation

os.platform() returns the operating system platform.

Q 8 - net.isIP(input) returns 0 for invalid input.

A - true

B - false

Answer : A

Explanation

net.isIP(input) tests if input is an IP address. Returns 0 for invalid strings, returns 4 for IP version 4 addresses, and returns 6 for IP version 6 addresses.

Q 9 - What REST stands for?

A - REpresentational State Transfer

B - Resource Efficient State Transfer

C - Real Elegant State Transfer

D - Resource Elegant State Transfer

Answer : A

Explanation

REST stands for REpresentational State Transfer.

Q 10 - A stream fires finish event when all data has been flushed to underlying system.

A - true

B - false

Answer : A

Explanation

A stream fires finish event when all data has been flushed to underlying system.

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