Questions

LDI is the capacity to change the conceptual schema without having to change external schemas or application programs.

Two series alternate here, with every third number following a different pattern.
In the main series, 4 is added to each number to arrive the next.
In alternate series, 5 is subtracted from each number t arrive the next number.
Here in the main series 
3 + 4 = 7
7 + 4 = 11
11 + 4 = 15
15 + 4 = 19

In alternate series 
24 - 5 = 19
19 - 5 = 14...

We know that, preceeded means to come before. 

Hence, the given sentence, preceded in death means that person had died before this person.

For example :: Rahul preceeded Ravi in death, means Rahul died before Ravi.

Volatile memory is computer memory that requires power to maintain the stored information. It is a temporary memeory which cannot contain information permanently.

Example :: RAM or Random Access Memory

In short, Democracy is a government "of the people, by the people, and for the people."

Definition :

Democracy "is government by the people in which the supreme power is vested in the people and exercised directly by them or by their elected agents under a free electoral system." 

The conditions of a democratic election are:

* Every citizen should have one vote ad every vote should have an equal value.

* Voters choose from the political parties and candidates should be free to contest elections giving the voters a real choice.

* Elections should be held at regular intervals.

* The candidate preferred by the people should get elected.

* Elections should be conducted in free and fair manner where people can choose as they really wish.

The pharynx is a passageway shared by both food and air.