Karim Djoudi's hearing follows court-ordered detention of ex-prime ministers Ahmed Ouyahia and Abdelmalek Sellal.
Accusations against the ruling party official include the misuse of public funds and abuse of office for personal gain.
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Demonstrators in Algiers demand the departure of senior figures linked with former President Abdelaziz Bouteflika.
Fifty-year-old businessman Mohamed Djemai replaces Moad Bouchareb, state television reports.
Abdelmalek Sellal is the second former prime minister to be detained over alleged corruption in two days.
Ahmed Ouyahia and a former minister detained after appearance in front of top court over corruption allegations.
E' accusato di corruzione
Protesters say transitional bodies need to be set up before free and fair elections can take place.
Banners depicting local youth's discontent with the status quo inspires people elsewhere to 'illustrate their anger'.