Exam MB-500 topic 4 question 1 discussion

SID1234-Updated 5 The table buffer is a reference so it keeps the udpated values. The SalesQty is dereferenced by the conversion to string method. I tested this and found two compile errors on line 17 and 22.

The following code: public static void main(Args _args) { RunnableClass1 test =new RunnableClass1(); test.run(); } public void run() { SalesTable salesTable; int salesQty = 5; salesTable.SalesId = 'SO1234'; this.updateValues(salesTable,salesQty); info(salesTable.SalesId); info(int2Str(salesQty)); } public void updateValues(SalesTable _salesTable, int _salesQty) { SalesTable salesTable = _salesTable; salesTable.SalesId = 'SO1234-Updated'; _salesQty = 10; } Returns result as SO1234-Updated 5

SID1234-Updated 5 by ChatGPT

they didnt write tmpFrmVirtual.update(); that's why answer is correct

Disregarding the fact that the given code wouldn't even compile... The output would be : 1) TmpFrmVirtual.Id ==> SID1234-Updated 2) salesQty ==> 5 As stated earlier by others : ------------------------------------------- 1) TmpFrmVirtual is a table buffer, and is always passed as a reference (i.e. as a pointer to the original table buffer, NOT as a COPY of the original table buffer). So any changes to the buffer made in the updateValues() method are actually made to the original buffer in the run() method. 2) The salesQty variable, on the other hand, is converted to and passed as a String, then converted back to integer. This means that we're are actually modifying the value of a COPY of the original variable, NOT the value of the original variable itself. Also the COPY of the original value only exists while executing the updateValues() method and it's value is never returned to the run() method. Hence the value of the salesQty variable in the run() method remaines unchanged.

SID1234-Updated 5 Table buffer is passed as reference, int as a value

SID1234 5

The Update method never touches the original objects... Output is the original input

Invalid codes info(salesQty); //error due to salesQty is an int int salesQty = _str2int(salesQty); //error, no _str2int and it should be _salesQty tmpFrmVirtual.Id = "SID1234"-Updated"; //error, wrong placement of double quotes If those errors were fixed the answers should be SID1234-Updated 5

SID1234-Updated 5 The table buffer is, as pointed out below, a reference, so any changes made to the buffer referenced by one variable are also visible in any other variables referencing the same buffer. There is no need for transactions or update()/doUpdate() for this.

The answer is correct. In updateValues method transaction is missing: ttsBegin; tmpFrmVirtual.doUpdate.Id = "SID1234-Updated"; salesQty = 10; tmpFrmVirtual.doUpdate(); ttsCommit;

the answer is correct. SID1234 5 in my mind , the table buffer is pass by reference, but the result is really different. I run it in visual studio, the answer is right. if you don't belive me, please just try the code in visual studio.

First parameter is pass by reference, Second is pass by Value. Answer: SID-1234-Updates, 5