No. Oppo A5 has dual sim card slot and a dedicated MicroSD card slot. You can use 2 sim cards and a memory card at the same time.
No. Oppo A5 does not have the front camera LED flash but it does have the display screen flash.
No. Oppo A5 does not have the fast charging support.
No. Oppo A5 has MicroUSB 2.0 port.