Write Salesforce Apex Code to take RecordID as input and print Object name and field names of sObject.

List<Schema.SObjectType> gd = Schema.getGlobalDescribe().Values();
Map<String,String> objectMap = new Map<String,String>();
for(Schema.SObjectType f : gd)
{
objectMap.put(f.getDescribe().getKeyPrefix(), f.getDescribe().getName());
}

String sampleId ='00390000003LIVw';
String prefix = sampleId.substring(0,3);
String objectName = objectMap.get(prefix);
System.debug('** SObject Name ** '+objectName);

Map<String, Schema.SObjectField> desResult = Schema.getGlobalDescribe().get(objectName).getDescribe().Fields.getMap();
List<String> fieldList = new List<String>();
fieldList.addAll(desResult.keySet());
for(integer i =0;i<fieldList.size();i++)
{
System.debug('** Field Name ** '+fieldList[i]);
}