Sockets MCQ question and answer in javascript with solution

The history object belongs to the Window object.

There are three methods belongign to the History object namely :
1. back()
2. forward()
3. go()

The forward() method loads the next URL in the history list.

The property location.hash needs to be updated to display the updated URL in the location bar.

The pushState() method adds a particular state to the browsing history.

When a web app enters a new state, it calls history.pushState() to add that state to the browsing history.

The replaceState() method is used to replace the current history state instead of adding a new state to the browsing history.

window.history.replaceState(stateObj, title, url) : This is just like window.history.pushState, except that the current browser state is removed from the history, so you cannot hit “back” to return to it.

The window.onpopstate event is fired whenever a state object is removed from the browser history, which occurs on browser “back” or “forward”. State objects are persisted on the user’s hard disk between sessions, which is a nice feature. The object passed into a call to pushState or replaceState is provided as the state property on the event object in the “popstate” event.

R is an extension of and successor to the S language, which was itself a statistical language created in 1976 by John Chambers while at Bell Labs.