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 - All APIs of Node.JS are.

A - Asynchronous

B - Synchronous

C - Both of the above.

D - None of the above.

Answer : A

Explanation

All APIs of Node.js library are aynchronous that is non-blocking.

Q 2 -What npm stands for?

A - Node Package Manager

B - Node Project Manager

C - New Project Manager

D - New Package Manager

Answer : A

Explanation

npm stands for Node Package Manager.

Q 3 - Which of the following code converts a buffer buf to JSON object?

A - buf.toJSON()

B - buf.json()

C - buf.covertToJson()

D - buf.jsonify()

Answer : A

Explanation

buf.toJSON() converts a buffer buf to JSON object.

Q 4 - Which of the following is true about Chaining streams?

A - Chanining is a mechanism to connect output of one stream to another stream and create a chain of multiple stream operations.

B - Chanining is normally used with piping operations.

C - Both of the above.

D - None of the above.

Answer : C

Explanation

Chanining is a mechanism to connect output of one stream to another stream and create a chain of multiple stream operations. It is normally used with piping operations.

Q 5 - Which of the following is true about global objects in Node applications?

A - Global objects are global in nature and they are available in all modules.

B - Global objects are nore required to be included in application, rather they can be used directly.

C - Both of the above.

D - None of the above.

Answer : C

Explanation

Node.js global objects are global in nature and they are available in all modules. We do not need to include these objects in our application, rather we can use them directly.

Q 6 - Which of the following is true about console global object?

A - There are built-in methods to be used for printing informational, warning and error messages in console.

B - console is used in synchronous way when destination is file or a terminal.

C - console is used in asynchronous way when destination is a pipe.

D - All of the above.

Answer : D

Explanation

Node.js console is a global object and is used to print different levels of messages to stdout and stderr. There are built-in methods to be used for printing informational, warning and error messages. It is used in synchronous way when destination is file or a terminal and asynchronous way when destination is a pipe.

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 4 for IP version 4 addresses.

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 - Which of the following module is required to create a child process?

A - process module

B - child_process module

C - child module

D - web module

Answer : B

Explanation

Node provides child_process module which provides ways to create child process.

Q 10 - Child processes always have three streams child.stdin, child.stdout, and child.stderr which may be shared with the stdio streams of the parent process.

A - true

B - false

Answer : A

Explanation

Child processes always have three streams child.stdin, child.stdout, and child.stderr which may be shared with the stdio streams of the parent process.

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