JQuery / Javascript Interview Questions

Ques: What is difference between setInterval () and setTimeout () ?

Ans: setInterval(expression, time) – It will run the code or function in the time interval.
Example –
setInterval(function(){ alert(“Hello”); }, 1000);
This will alert “Hello” after every 1 second(1000 milliseconds).

setTimeout() – It will run after the time.
Example –
setTimeout(function(){ alert(“Hello”); }, 1000);
This will alert “Hello” once only after 1 second(1000 milliseconds).

Ques: When will be the fourth argument to open() function ?

Ans: When the second argument named as existing window.

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