Article: Sometimes it is desired to bring a database back to a previous state (for many reasons, e.g., cases when the database is found corrupted due to a software error, or if it has been updated with erroneous data). To achieve this a backup operation is done occasionally or continuously, where each desired database state (i.e., the values of its data and their embedding in database's data structures) is kept within dedicated backup files (many techniques exist to do this effectively). When this state is needed, i.e., when it is decided by a database administrator to bring the database back to this state (e.g., by specifying this state by a desired point in time when the database was in this state), these files are utilized to restore that state.

Question: Name a reason to take a database backward in time?
Ans: database is found corrupted


Article: Chopin's music remains very popular and is regularly performed, recorded and broadcast worldwide. The world's oldest monographic music competition, the International Chopin Piano Competition, founded in 1927, is held every five years in Warsaw. The Fryderyk Chopin Institute of Poland lists on its website over eighty societies world-wide devoted to the composer and his music. The Institute site also lists nearly 1,500 performances of Chopin works on YouTube as of January 2014.

Question: When was the International Chopin Piano Competition established?
Ans: 1927


Article: The stagnation and decline, Stephen Lee argues, was relentless after the death of Suleiman in 1566, interrupted by a few short revivals or reform and recovery. The decline gathered speed so that the Empire in 1699 was, "a mere shadow of that which intimidated East and West alike in 1566." Although there are dissenting scholars, most historians point to "degenerate Sultans, incompetent Grand Viziers, debilitated and ill-equipped armies, corrupt officials, avaricious speculators, grasping enemies, and treacherous friends." The main cause was a failure of leadership, as Lee argues the first 10 sultans from 1292 to 1566, with one exception, had performed admirably. The next 13 sultans from 1566 to 1703, with two exceptions, were lackadaisical or incompetent rulers, says Lee. In a highly centralized system, the failure at the center proved fatal. A direct result was the strengthening of provincial elites who increasingly ignored Constantinople. Secondly the military strength of European enemies grew stronger and stronger, while the Ottoman armies and arms scarcely improved. Finally the Ottoman economic system grew distorted and impoverished, as war caused inflation, world trade moved in other directions, and the deterioration of law and order made economic progress difficult.

Question: In what year did Suleiman die?
Ans: 1566


Article: Until the 1990s further replays would be played until one team was victorious. Some ties took as many as six matches to settle; in their 1975 campaign, Fulham played a total of 12 games over six rounds, which remains the most games played by a team to reach a final. Replays were traditionally played three or four days after the original game, but from 1991–92 they were staged at least 10 days later on police advice. This led to penalty shoot-outs being introduced, the first of which came on 26 November 1991 when Rotherham United eliminated Scunthorpe United.

Question: Do clubs replay each other?
Ans:
Until the 1990s further replays would be played until one team was victorious.