String currQuery = "Select ISOCode, ConversionRate, IsActive from CurrencyType where IsActive = True and ISOCODE = '"+oppCurrencyISOCode+"'";
                
                QueryResult qrCurr = sfdcCtrl.query(currQuery);
                XmlObject xmlObj =  XmlObject.Factory.parse(qrCurr.getRecordsArray(0).xmlText());

<xml-fragment xsi:type="sf:CurrencyType" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <sf:ConversionRate xmlns:sf="urn:sobject.enterprise.soap.sforce.com">42.4351</sf:ConversionRate> 
  <sf:IsActive xmlns:sf="urn:sobject.enterprise.soap.sforce.com">true</sf:IsActive> 
  <sf:IsoCode xmlns:sf="urn:sobject.enterprise.soap.sforce.com">INR</sf:IsoCode> 
  </xml-fragment>

String currQuery = "Select ISOCode, ConversionRate, IsActive from CurrencyType where IsActive = True and ISOCODE = '"+oppCurrencyISOCode+"'";
                
                QueryResult qrCurr = Ctrl.query(currQuery);
               XmlObject xmlObj =  XmlObject.Factory.parse(qrCurr.getRecordsArray(0).xmlText());
              XmlCursor cur = xmlObj.newCursor();
                while ( cur.hasNextToken ()) { 
                String tokenInfo = collectTokenTypeInfo ( cur ) + "\n\n" ; 
                responseBuffer.append ( tokenInfo ) ; 
                cur.toNextToken () ; 
               } 
              cur.dispose () ; 
 
 
private String collectTokenTypeInfo ( XmlCursor cursor ){ 
         String response = null ; 
         XmlOptions options = new XmlOptions () ; 
 
         switch ( cursor.currentTokenType () .intValue ()){ 
             
             case TokenType.INT_STARTDOC: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is at the very beginning of the document, before any markup." ; */
                 break ; 
 
             case TokenType.INT_START: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is just before this element's start: \n" + cursor.xmlText ( options ) ; */
                 break ; 
 
             case TokenType.INT_ATTR: 
                 response = cursor.currentTokenType () + 
                     "; cursor is just before this attribute: \n"+ cursor.getTextValue () ; 
                 //response = cursor.getChars ();
                 break ; 
 
             case TokenType.INT_TEXT: 
                 response = cursor.currentTokenType () + 
                     "; cursor is just before this text (may be whitespace): \n" + cursor.getChars () ; 
                // response = cursor.getChars ();
                 break ; 
 
             case TokenType.INT_NAMESPACE: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is just before this namespace: \n" + cursor.xmlText () ; */
                 break ; 
 
             case TokenType.INT_COMMENT: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is just before this comment: " + cursor.xmlText () ; */
                 break ; 
 
             case TokenType.INT_PROCINST: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is just before this processing instruction: " + cursor.xmlText () ; */
                 break ; 
 
             case TokenType.INT_END: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is just before the token representing an element's end." ; */
                 break ; 
 
             case TokenType.INT_ENDDOC: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is at the end of the XML." ; */
                 break ; 
 
             case TokenType.INT_NONE: 
                 /*response = cursor.currentTokenType () + 
                     "; cursor is not at any recognizable token; it's just before: \n " + 
                         cursor.xmlText ( options ) ; */
                 break ; 
             default : 
                 //response = "Yo! Something funky happened!" ; 
         } 
 
         /* Return the response string. */ 
         return response; 
     }