yes, it is an original Olympic sport.
Racquetball is not an Olympic sport.
Yes. Tennis was a sport at the first modern Olympics in 1896 until 1924 when it was discontinued. It made its return to the Olympics in 1984 and has been contested ever since.
Trampoline Tennis Table-tennis
Tennis was an event at the first modern Olympics in 1896 and was competed at every Olympics until 1924. Tennis was dropped after the 1924 Games and did not make its return until 1984 as a demonstration sport and 1988 as a medal sport.
Have you ever tried playing an Olympian in Table Tennis? It's an Olympic sport because it takes skill to play it.
1998
Summer
Table Tennis and Badminton are Olympic sports. Racquetball, however, is not.
Tennis was a part of the original modern Olympics that were started in 1896. Tennis was an Olympic sport until after the 1924 Olympics when it was dropped. Tennis, again, became an Olympic sport beginning with the 1988 Olympics.
1996
Table tennis or ping pong became an Olympic sport in 1988 in Seoul.