Node.js Online Quiz

Q 1 - All APIs of Node.JS are.

A - Asynchronous

B - Synchronous

C - Both of the above.

D - None of the above.

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.

C - Both of the above.

D - None of the above.

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.

C - emit property is used to fire an event.

D - None of the above.

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

A - Piping is a mechanism where we provide output of one stream as the input to another stream.

B - Piping is normally used to get data from one stream and to pass output of that stream to another stream.

C - There is no limit on piping operations.

D - All of the above.

Q 5 - Which method of fs module is used to read a directory?

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

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

C - fs.readdir(path, callback)

D - None of the above.

Q 6 - Which of the following code print the endianness of operating system?

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

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

C - console.log('endianness : ' + os.getEndianness());

D - None of the above.

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.

Q 8 - Which of the following method resolves an ip address to an array of hostnames?

A - dns.reverse(ip, callback)

B - dns.resolve(hostname[, rrtype], callback)

C - dns.resolve4(hostname, callback)

D - None of the above.

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.

Q 10 - Duplex stream can be used for both read and write operation.

A - true

B - false