This can only be confirmed by testing the Juniper DAC cable with your HPE server, I don't think this is officially supported by HPE.
> Also I know that there are 4 QSFP ports ,Can I use them with DAC 10 G ?
10G DAC cables are SFP+ transceivers, while QSFP Ports are slots for QSFP transceivers (40G). So you cannot use 10G DAC cables with QSFP ports, as you simply cannot plug it in.