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Q 1 - Which of the following is true about Node.JS?
Node.js is a very powerful JavaScript based framework/platform built on Google Chrome's JavaScript V8 Engine. It is used to delevop I/O intensive web applications like video streaming sites, single page applications and other web application. Node.js is open source, completely free, and used by thousands of developers around the world.
Q 2 - By default, npm installs any dependency in the local mode.
The setInterval(cb, ms) global function is used to run callback cb repeatedly after at least ms milliseconds. The actual delay depends on external factors like OS timer granularity and system load. - A timer cannot span more than 24.8 days. This function returns an opaque value that represents the timer which can be used to clear the timer using the function clearInterval(t).
Q 6 - Which of the following code prints process version?
dns.lookup(hostname[, options], callback) resolves a hostname (e.g. 'google.com') into the first found A (IPv4) or AAAA (IPv6) record. options can be an object or integer. If options is not provided, then IP v4 and v6 addresses are both valid. If options is an integer, then it must be 4 or 6.
Q 9 - Which of the following is true about exec methd of child_process module.
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.
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.
