This is the third day of grilling for Kumar and the second for Ghosh.
On Sunday, the probe agency questioned Kumar separately and also along with Ghosh. The marathon questioning of the two lasted over eight hours, he said.
He was also examined in the Rose Valley case on Sunday.
Officials in Delhi said the CBI has not acceded to Kumar's demand to have his questioning session videographed.
It is done only in cases of custodial interrogations, they said.
Ghosh earlier implicated BJP leader Mukul Roy, who was once the right hand man of Banerjee, and 12 others in the Saradha scam.
The Supreme Court directed Kumar on Tuesday to appear before the CBI and "faithfully" cooperate in the investigation of cases arising out of the Saradha chit fund scam.
The court chose Shillong as a neutral meeting place "to avoid all unnecessary controversy" and made it clear that Kumar would not be arrested.
Banerjee had rushed to the spot and staged a three-day 'Save the Constitution' sit-in against the CBI move, accusing Prime Minister Narendra Modi and BJP national president Amit Shah of plotting a "coup".
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)