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Questions

Explain the working of timers in JavaScript? Also elucidate the drawbacks of using the timer, if any?

What are all the looping structures in JavaScript?

What is called Variable typing in Javascript?

What are global variables? How are these variable declared and what are the problems associated with using them?

What is a prompt box?

What is === operator?

Explain how to detect the operating system on the client machine?

What do mean by NULL in Javascript?

What is the function of delete operator?

What are all the types of Pop up boxes available in JavaScript?