Which kind of lock includes a keypad that can be used to control access into areas?

As we all see every now and then many countries are in the race of launching space shuttles or rockets or satellites. What exactly are the benefits of space programmes which otherwise are very costly affairs for the countries ?
1. It is nothing but a fun to have a visit to space. It has no real benefit as such.
2. Humanity can be served/benefited by getting data on weather, disaster alerts and/or resource centres connected through satellites.
3. Since earth is no longer a place to live we have to find out a place where in the next few years we can shift and survive. Such programmes help us in all this.

While searching a website, you have been unable to find information that was on the site several months ago. What might you do to attempt to locate that information?

Lot of discussion is going on these days on the issue of ‘Participatory Note’ (P Notes) used in financial sector/money market. What is Participatory Note ?
[Pick up the correct statement(s)]
1. It is nothing but another name of the banking operation by which banks exchange Indian Rupees into US Dollars without depositing a single rupee in the account of
the party who are NRIs. The entire operation is carried out by the banks solely on the basis of the credit and goodwill of the NRI party.
2. It is an offshore derivative instrument used by overseas buyers/investors who buy shares of Indian companies listed in Indian Stock Exchange anonymously.
3. It is nothing but a type of undertaking given to the banks that they should continue investing money in stock markets on behalf of the NRIs and in case the market crashes NRI’s will make the losses good without delay.

The term, "hypertext", means—

What is Internet 2?