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 - How Node based web servers are different from traditional web servers?
A - Node based server process request much faster than traditional server.
Answer : B
Explanation
Node based server uses a single threaded model and can services much larger number of requests than traditional server like Apache HTTP Server.
Q 2 - What is Callback?
A - Callback is an asynchronous equivalent for a function.
B - Callback is a technique in which a method call back the caller method.
Answer : A
Explanation
Callback is an asynchronous equivalent for a function.
Q 3 - Which of the following is true about EventEmitter.emit property?
A - emit property is used to locate an event handler.
B - emit property is used to bind a function with the event.
Answer : C
Explanation
emit property is used to fire an event.
Q 4 - Which of the following is true about File I/O in Node applications?
A - Node implements File I/O using simple wrappers around standard POSIX functions.
B - Node File System (fs) module should be imported for File I/O opearations.
Answer : C
Explanation
Node implements File I/O using simple wrappers around standard POSIX functions. Node File System (fs) module should be imported for File I/O opearations.
Q 5 - Which of the following is true about clearTimeout(t) global function?
Answer : A
Explanation
The clearTimeout( t ) global function is used to stop a timer that was previously created with setTimeout(). Here t is the timer returned by setTimeout() function.
Answer : A
Explanation
The process object is a global object and can be accessed from anywhere.
Q 7 - Which of the following is the correct way to get an extension of a file?
Answer : B
Explanation
path.extname(p) returns the extension of the path, from the last '.' to end of string in the last portion of the path. If there is no '.' in the last portion of the path or the first character of it is '.', then it returns an empty string.
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?
Answer : B
Explanation
Node provides child_process module which provides ways to create child process.
Answer : A
Explanation
A stream fires end event when there is no more data to read.
