Which two methods are best practice to implement heap size control for the above code?
As a part of class implementation a developer must execute a SOQL query against a large data ser based on the contact object.
The method implementation is as follows.
Which two methods are best practice to implement heap size control for the above code? (Choose 2 Answers)
A . Use the FOR UPDATE option on the SOQL query to lock down the records retrieved.
B . Use visual keyword when declaring the retrieve variable.
C . Use a SOQL FOR loop, to chunk the result set in batches of 200 records.
D . Use WHERE clauses on the SOQL query to reduce the number of records retrieved.
Answer: B,C
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C and D is the right option