The new German central bank (Bundesbank) vice-president Claudia Buch poses during a photocall at the Bundesbank headquarters in Frankfurt, May 20, 2014.
Buch, who has been the vice-president of Germany's central bank for 10 years after a career in academia, was chosen last week over Spain's Margarita Delgado, the European Parliament's preferred candidate.
The EU Parliament will have a final say on the appointment on Wednesday at a vote scheduled for 1400 GMT.
At the hearing, Buch said she would immediately resign from her role as an alternate if appointed as chief supervisor.
ECB President Christine Lagarde said last week that the 26-member Governing Council followed the rules in Buch's selection.
Persons:
Claudia Buch, Ralph Orlowski, Buch, Spain's Margarita Delgado, Joachim Nagel, Christine Lagarde, Marco Zanni, Frank Siebelt, Hugh Lawson, Alexandra Hudson
Organizations:
REUTERS, Central, Single, EU, ECB, Reuters, Council, Democracy Group, Alexandra Hudson Our, Thomson
Locations:
Frankfurt, FRANKFURT, Spain