Slovakia became an independent state twice.
Firstly in 1939, when (First) Slovak Republic aka Slovak State was formed after Czechoslovakia dissolved, when Adolf Hitler took today's Czech Republic as a Protectorate of Bohemia and Moravia. Czechoslovakia was reinstituted after the war in 1945.
Second time, when Czechoslovakia broke into Czech Republic and Slovakia, was on 1st January 1993.
Slovakia came into existence with the break up of Czechoslovakia in 1993 into the Czech Republic and Slovakia.
In what year did Madagascar become fully independent from France?
No. Slovakia is an independent country. Czechoslovakia no longer exists. Up until 1993 it consisted of what is now Slovakia and what is now another independent country, the Czech Republic.
1994
No. Slovakia is an independent country. Until 1993 it was part of Czechoslovakia along with the Czech Republic, which is now also an independent country.
1960
1902
1973
in 1834
1953
In a year
1948