What exactly is Resurrection of the dead before the day of Judgement? Is it a physical raising of the dead bodies from their earthly graves?....................................
Does this mean different christian denominations have different interpretations of it?
I find it is good to keep in mind Jesus' illustration about the weed/tares and the wheat.
The 'weed/tares' are the fake Christians, and the 'wheat' are the genuine Christians.
Also, Jesus forewarned us that MANY would come in his name but prove false - Matthew 7:21-23.
In the Bible we find two (2) Judgement Days:
First, we are nearing the judgement day (time period) at Jesus' coming Glory Time, the 'time of separation ' on Earth.
This judgement time is for the living figurative humble 'sheep ' and haughty ' goats ' as found at Matthew 25:31-34,37.
Second, there is a first or earlier resurrection for the dead as found at Revelation 20:6; 2:10; 5:9-10.
This heavenly resurrection is for people like those of Luke 22:28-30, those called as saints or holy ones - Daniel 7:18.
The physical resurrection takes place during Jesus' Millennium-Long Day of governing over Earth for a thousand years.
This is why the future tense is used at Acts of the Apostles 24:15 that there 'is going to be' a resurrection.......
ALL who died before Jesus died were Not offered a heavenly resurrection but earthly - Hebrews 11:13,39.
This physical earthly resurrection even includes people like King David - Acts of the Apostles 2:34.