Salesforce Interview Questions in 2018 | Visualforce | Apex

1. What is Apex?
2. What API is used in the apex?
3. What are the access modiﬁers in the apex?
4. What is the difference between With Sharing and Without Sharing?
5. What is a constructor?
6. What is the use of the static variables?
7. What are reference variables in apex?
8-. What. Are Sobject's'?
9. What is the. Difference between List and Set?
IO. What is Map in apex?
11. Can we have duplicate Keys in Map
12. How many objects we can store in list ?
13.What are setter and getter methods?
14. How do you refer to current page id in apex?
15. How to do you invoke standard actions in apex class?
16. What is page reference?
17. How do you pass the parameters from on apex class to another to another?
18. What is virtual class?
20. What is abstract class?
21. What is overloading?
22. What is overriding?
23.When we invoke with sharing method in without sharing class .Now method is Executed as?
24. Will the inner class inherits the sharing properties of outer class?
25. Base class is declared as With Sharing and Derived class is declared as without Sharing what will happen?
26. Can I have constructor with parameters in apex?
27 .Derefemcing a Null pointer value error?
28. Variable is not available?
29. Too many Records: ‘10001

1. What are the Soql limitations in apex?
2. What are transaction limits in apex?
3. What is the need of batch apex?
4. What is Database.Batchable interface?
5. Define the methods in Batchable interface?
6. What is purpose of Start method in batch apex?
7. What is the Database.QueryLocator ?
8. What is the Iterable?
9. How to deﬁne the custom Iterable?
10. What is the use of execute method?
11. How many times execute method is called?
12. What is scope-of execute method?
13. Can we call callouts from batch apex?
14. Can we call another batch apex from batch apex?
15. How many callouts we can call in batch apex?
16. If you get Callouts Governing limits error how do you rectify?
17. Batch is synchronous or Asynchronous operations?
18. How to synchronize the batch apex?
19. How do you call batch apex from the batch apex in earlier versions of API 26.0?
20. What all the general errors/exception we will get in executing batch apex?
21. What is the maximum size of the batch and minimum size of the batch?
22. Tell some of the scenario’s that you have developed using batch apex?
23. What is Database? BatchableContext?
24. HOW to track the details of the current running Batch using BatchableContext?
25. How many batch jobs can be added to queue?
26. What is Database.Stateﬁill Interface
27. What is Database.AllowCallouts?
28. Why should we call Database.Execute() and future methods in Test.StartTest() and Test.StopTest()
29. What is ASyncApexJob object?
30. When a BatchApexWorker record is created?

1. What is trigger?
2. What are differenttypesof Triggers in sfdc?
3. What areTrigger Context variable? _
4. What is the difference between Trigger. New and :Trigger.NewMap
5. What is the difference between TriggerNew and T ri gger.old, ’ i i 1' 4
6.What is the difference between and TriggerNew and Tn'ggerOld in update Trigger
7. Can we call the Batchapex from the trigger?
8. What are the problems you have encountered when calling batch apex from the trigger.
9. Can we call the callouts from triggers?
10. What are the problems that you encountered while calling apex callouts in triggers.
11. What is the recursive triggers?
12. What is bulkifying triggers?
13. What is the use of future methods in triggers?
14. What is the order of executing the trigger apex?
15. What is trigger handler?
16. How do you avoid-recursive triggers?
17. HOW many triggers we can deﬁne ona object?
18. Can we deﬁne two triggers with same event on single object?
19. Tell me some scenarios’ where you have written the triggers?
20. What is the best scenario that you have developed on triggers?
21. How many time workﬂow ﬁled update will be called in triggers?
22. When are the rollup summary ﬁelds are calculated ?