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 - What is Node.JS?
B - Node.js is a JavaScript based framework/platform built on Google Chrome's JavaScript V8 Engine.
Answer : B
Explanation
Node.js is a JavaScript based framework/platform built on Google Chrome's JavaScript V8 Engine.
Q 2 - Which of the following command will show version of Node?
Answer : B
Explanation
Executing $ node --version command will show the version of Node 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)
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 __filename global object?
A - The __filename represents the filename of the code being executed.
B - The __filename represents the resolved absolute path of code file.
Answer : C
Explanation
The __filename represents the filename of the code being execute
Q 6 - Which of the following is true about process global object?
A - The process object is an instance of EventEmitter.
Answer : D
Explanation
The process object is an instance of EventEmitter and emits the above mentioned events.
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/..')
Answer : A
Explanation
path.normalize(p) normalizes a string path, taking care of '..' and '.' parts.
Q 8 - Which of the following API creates a client?
A - net.createServer([options][, connectionListener])
B - net.connect(options[, connectionListener])
Answer : A
Explanation
net.connect(options[, connectionListener]) is a factory method, which returns a new 'net.Socket' and connects to the supplied address and port and can be used to create a client.
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.
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.
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.
