Salesforce interview question part2

1. For which criteria in workflow "time dependent workflow action" cannot be created?
    Ans: created, and every time it’s edited

2. What is the advantage of using custom settings?
     Ans : You dont have to query in apex (fire select query) to retrieve the data stored in custom settings.

3. What are the different workflow actions available in workflows?
     Ans: 1. Field update 2. Email alert 3. send Outbound messages 4. Create new task

4. What is whoid and whatid in activities?
    Ans: Whoid is the id of either contact or Lead. Whatid is the id of the related to record in activity record(standard or custom object)

5. What is the difference between a standard controller and custom controller
     Ans: standard controller inherits all the standard object properties, standard button functionalities can be directly used. Custom controller defines custom functionalities, a standard controller can be extended to develop custom functionalities using keyword "extenssions"

6. Can you have more than one extenssions associated with a single page?
     Ans : Yes we can have more than extenssions.

7. If page is having multiple extenssions and if two extenssions have methods of same name.     Then which method out of these two will be called upon calling from vf page ?

  Ans: The one which is present in the controller defined on the left side will be called.

8. What are governer limits ?
     Ans: Governer limits are the limits imposed by salesforce so as to avoid monopoly by orgs in using salesforce shared resources.

9. how can we implement pagination in visualforce ?
    Ans: use standardset controllers for implementing pagination.

10. What is the difference between force.com and salesforce.com
       Ans: force.com is paas(platform as a service) and salesforce.com is Saas(software as a service)

11. What is a externalid in salesforce
       Ans: It is a field which can be used to store a value that is used as a refernce for that record in other system. For example if you have a record in system 'xyz' where it is referenced by some value then that value can be used as external id in salesforce for that record. External id can be used for upsert operation in data loader

12. What happens upon lead conversion ?
       Ans: When lead is converted a contact, account and optionally an opportunity is created.

13. What are different ways of deployment in salesforce ?
       Ans: Change sets, eclipse and ANT

14. How can you override a list button with a visuaflorce page?
       Ans: Visualforce page should be a list controller that is it should have "recordsetVar" attribute defined in page tag.

15. Is it possible to bypass Grant Access Using Hierarchies in case of standard objects ?
      Ans : No. This is default and cannot be changed.

How can you call a controller method from java script ?
Ans: Use action function component to call controller method from java script.

17. How can you call a visualforce page from a controller method?
Ans: Use pagereference object for calling a visualforce page from controller method

18. How can you sort a select SOQl query ?
Ans: use order by clause in select query for sorting a list of records

19. How much code coverage is needed for deployment?
Ans : Each trigger should have minimum of 1%. Class can have 0%. But, the total code covergae of 75%.

20. Can 'set' store duplicate values in it?
Ans : No. Set only stores unique values. List can have duplicate values in it.

21. Can two users have same profiles?

Ans: Yes

22. How can you refresh a particular section of a  visualforce page?
Ans: This can be done using reRender attribute 

23. How can you create a many to many relationship in salesforce
Ans: This can be done by creating junction object between the two objects.

24. What happens to detail record when a master record is deleted?
Ans: detail record gets deleted.

25. What happens to child record when a parent record is deleted(look up relationship)?
Ans. Child record remains undeleted 

26. How to get current logged in users id in apex ?
Ans: Use Userinfo.getuserid() to get the current logged in user's id in apex.

27. How to convert a csv file  browsed in visualforce page into a string.
Ans: use csvfilecontents.tostring(). method to convert blob to string

28.How many records can a select query return ?
Ans : As of now it can return upto 50000 records.

29. How many records can a sosl query return ?
Ans: as of now it can return upto 2000 records

30. How to fire dynamic query in soql?
Ans: Using database.query
     Example: List<account> accList = Database.query('select name from account');

What is a bucket field in reports?
Ans: This field is used for custom grouping of values in a field. This can be used in summarising the report.

32. What are dynamic dashboards ?
Ans: Dashboards which run for logged in user are dynamic dashboards

33. Can the dynamic dashboards be scheduled?
Ans: No they cannot be scheduled.

34.How can you use custom label; in visualforc page?
Ans: Use this syntex for accessing custom albel in visualforce page - {!$Label.Samplelabel}

35.What are the types of custom settings in salesforce?
Ans: List type and Heirarchy type

36.What are the different types of collections in apex?
Ans: There are three types of collections in apex language
     1. Set
     2. List
     3. Map

37. What are maps in apex?
Ans: Map has keys and values. A key points to a single value. Map can be used to store realationship between two entities. Keys in map are unique. Values can be duplicated.

38. What are the different types of object relations in salesforce ?
Ans: 1. One to many
     2. Many to many
     3. Master detail

39.Can you have roll up summary fields in case of parent child relationship?
Ans: No. These are present only in case of master details relationship.

40. Can you see a lead which is converted in saleforce UI?
Ans: The detail record is not seen. But a page, wherein it shows the links for formed account, contact and opportunity.

41. What is the difference between action function and action support ?
Ans: Action functions can call controller method from java script, action support adds support to other components.

42. What is action poller in visualforce ?
Ans: Action poller sends AJAX request with a specified time interval.

43. What are the different types of reports available in salesforce?
Ans: 1. tabular report
     2. Summary Report
     3. Matrix Report
     4. Joined Report

44. How many active assignments rule can you have in lead/Case?
Ans: You can have only one active assignment rule at a time

45. How do we access static resource in visualforce?
Ans: Use this syntex for accessing static resource {!$Resource.Testresourcename}

46. How to embed a visaulflow in a visualforce page ?
Ans: Use this syntex to embed flow in vf page : <flow:interview />

47. How to enable inline editing in visauflorce page ?
Ans You can enable inline editing in visualforce page by using <apex:inlineEditSupport> component.

48. What is trigger.new in trigger ?
Ans: trigger.new is a list of records that are in the context of trigger or becuase of these records(modification,Creation, deletion) the trigger has been called

49. How do we bulkify the trigger ?
Ans: Bulkfification requires iterating over all the records in trigger context
     for example : for(account ac: trigger.new){
                       // your logic here           
                   }

50.How can we get the old value in trigger ?
Ans: use trigger.old map for getting previous values of fields.