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 1Which of following command starts a REPL session?

Answer : A

Explanation

REPL can be started by simply running node on shell/console without any argument.

Q 2 - By default, npm installs any dependency in the local mode.

A - true

B - false

Answer : A

Explanation

By default, npm installs any dependency in the local mode.

Q 3 - Which of the following provides in-built events.

Answer : A

Explanation

Node has multiple in-built events available through events module.

Q 4 - Which method of fs module is used to get information about file?

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

B - fs.stat(path, callback)

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

D - None of the above.

Answer : B

Explanation

fs.stat(path, callback) is the method which is used to get information about a file.

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 code print the name of operating system?

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

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

C - console.log('type : ' + os.getType());

D - None of the above.

Answer : B

Explanation

os.type() returns the operating system name.

Q 7 - Which of the following is the correct way to get a normalized path?

A - path.normalize('/test/test1//2slashes/1slash/tab/..')

B - fs.normalize('/test/test1//2slashes/1slash/tab/..')

C - os.normalize('/test/test1//2slashes/1slash/tab/..')

D - None of the above.

Answer : A

Explanation

path.normalize(p) normalizes a string path, taking care of '..' and '.' parts.

Q 8 - Which of the following is true about internal binding with respect to domain module?

A - Error emmitter is executing its code within run method of a domain.

B - Error emmitter is added explicitly to a domain using its add method.

C - Both of the above.

D - None of the above.

Answer : A

Explanation

Error emmitter is executing its code within run method of a domain in case of internal binding.

Q 9 - Which of the following is true about exec methd of child_process module.

A - The exec() method runs a command in a shell and buffers the output.

B - The exec() method returns a buffer with a max size.

C - The exec() method waits for the process to end and tries to return all the buffered data at once.

D - All of the above.

Answer : D

Explanation

child_process.exec method runs a command in a shell and buffers the output. It returns a buffer with a max size and waits for the process to end and tries to return all the buffered data at once.

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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