(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.
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No checking collection emptiness before DML
No Test data factory/builder
SOQL without WHERE or LIMIT outside Batch
Hard-coded authentication instead of using Named Credentail
Excessive lack of .startTest() and .stopTest()
No Fault Paths in Flows
Hard-coded ID
Exactly 75% test coverage
Public Read/Write OWDs
Calling Queueable in loop without control mechanism or logging
DMLs in loop
Hard-coding UI text instead of Custom Labels
SOQLs in loop
Multiple triggers on one sObject
Method with 100s 'i++' lines for fake code coverage
Excessive amount of System.Debug()
Nondescriptive variable names in Flow
Only catching general catch(Exception)
Unjustified big number of Record Flows on one sObject
