QUES: For instance, a common use of a database system is to track information about users, their name, login information, various addresses and phone numbers. In the navigational approach all of this data would be placed in a single record, and unused items would simply not be placed in the database. In the relational approach, the data would be normalized into a user table, an address table and a phone number table (for instance). Records would be created in these optional tables only if the address or phone numbers were actually provided.

How is a database system rarely used?
What is the answer?
ANS: unanswerable
QUES: In terms of ship categories, Greek companies have 22.6% of the world's tankers and 16.1% of the world's bulk carriers (in dwt). An additional equivalent of 27.45% of the world's tanker dwt is on order, with another 12.7% of bulk carriers also on order. Shipping accounts for an estimated 6% of Greek GDP, employs about 160,000 people (4% of the workforce), and represents 1/3 of the country's trade deficit. Earnings from shipping amounted to 14.1 billion in 2011, while between 2000 and 2010 Greek shipping contributed a total of 140 billion (half of the country's public debt in 2009 and 3.5 times the receipts from the European Union in the period 20002013). The 2011 ECSA report showed that there are approximately 750 Greek shipping companies in operation.

What did earnings from Greece's shipping amount to a loss of in 2011?
What is the answer?
ANS: unanswerable
QUES: St. John's was the starting point for the first non-stop transatlantic aircraft flight, by Alcock and Brown in a modified Vickers Vimy IV bomber, in June 1919, departing from Lester's Field in St. John's and ending in a bog near Clifden, Connemara, Ireland. In July 2005, the flight was duplicated by American aviator and adventurer Steve Fossett in a replica Vickers Vimy aircraft, with St. John's International Airport substituting for Lester's Field (now an urban and residential part of the city).

What aircraft did Alcock and Brown use in 1919 for their flight?
What is the answer?
ANS:
Vickers Vimy IV bomber