Salesforce Interview Questions - Latest - Part 1
Salesforce Interview Questions - Latest - Part 1
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.
16. 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?
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');
31. 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.
51. Can we modify records directly
in trigger.new ?
Ans:
trigger.new is a read only list, but field values can be changed in case of
before trigger
52. What does the error "list
has no rows for assignment" mean?
Ans:
it means the list you are trying to access has no values in it.
53. Why should we not write select
query within for loop?
Ans:
Writing select query within for loop may hit the governer limit of 100 select
queries.
54. What should we do to avoid view
state error in visualforce page?
Ans:
Clear unused collections, define variable as transient.
55. What is a sandbox org?
Ans:
It is the exact copy of your production org. This could be full copy, developer
or configuration only type.
56. What is sosl?
Ans:
select query that can return records of multiple objects as list of lists
57. How many records a select query
soql can return?
Ans:
as of now the limit is 50000
58. What is the full form of AJAX?
Ans:
it stands for assynchronous java and XML
59. Why do we need to write test
classes?
Ans:
Salesforce does not allow deployment in production if the test coverage is less
than 75%
60.How can you show a custom error
message in trigger?
Ans:
This can be done using addError() method in trigger
61. What is the use of future
annotation?
Ans:
Future method starts execution when Salesforce has resources available.That is
for asynchronous execution.
62. How to identify if a class is a
test class?
Ans:
test class always begins with @isTest
63. How to convert a blob variable
into a string?
Ans
Use toString to convert blob into string
64. what are the different methods of
batch apex class?
Ans:
start method, execute method and finish method
65.What is' with sharing' in apex
class code?
Ans:
When you use 'with sharing', user's permissions and field-level security are
respected. In case of 'without sharing' code runs in system mode.
66. How many records can a sosl
return ?
Ans:
It can return 2000 records as of now as per governers limit
67. Can you use dml statement in
visualforce compoenent controller ?
Ans:
To use dml in visualforce component you have to declare allowdml=true in
visualforce component otherwise you will get an exception
"DML is currently not allowed"
68. Can you write sosl in
trigger>?
Ans:
NO sosl are not allowed in triggers, they can only be used in classes.
69. Which are the different access modifiers
in apex?
Ans:
1. Private 2. Public 3. Protected 4.Global are the four access modifiers
allowed in apex
70. Can you change the master of a
detail record in salesforce ?
Ans.
Yes provided you have ticked marked "Allow reparenting" in field
setting otherwise the field is read only and master cannot be changed.
71. How can you lock records in
apex?
Ans:
use For update in query to lock the record. For example: [select id,name from
contact limit 10 For update];
72. IS there any limit on the number
of items that can be stored in apex collections?
Ans:
There is ni such limit but we need to consider heap size limit 6mb (6 MB as of
now)
73. How can you monitor future
actions of time based workflow?
Ans:
setup --> administration set up --> monitoring --> time based workflow
74. What is visaulforce component ?
Ans:
It is a piece of code that can be reused. It can be encapsulated in other
visualforce pages.
75. Ho can you display the status of
an AJAX update request in a visualforce page ?
Ans:
To display AJAX request status we can use <apex:actionstatus> component.
76. How can you access custom label
in apex:
Ans:
Example --> string custLabelstr = System.Label.LabelNamehere
77.How can you get all the keys of a
map variable ?
Ans:
USe method keyset() for this
Example = Set<id> idSet =
mapname.keyset();
78. How can you compare values of a
picklist field in validation rule?
Ans
: for comparing picklist value use ispickval
ISPICKVAL(picklist_field,
text_to_compare)
79. What are the different types of
sandboxes in salesforce ?
Ans:
Developer, Full copy and configuration only are the three types of sandboxes in
salesforce.
80. With what frequency can you
refresh a full copy sandbox?
Ans:
full copy sandbox can be refreshed every 28 days from production.
81. How can you make fields required
on a visualforce page?
Ans:
mark required = true as done in the example below:
<apex:inputfield
value="{!account.Description}" required="true"/>
82. What is minimum coverage for
every trigger for deployment?
Ans:
every trigger should have a minimum coverage of 1%. Total coverage should be
75%
83. What is minimum coverage for
every class for deployment?
Ans:
There is no such requirement. A class can have 0% but the total coverage should
be >75%
84. How can you implement custom
functionality for a standardcontroller visualforce page?
Ans:
This can be done by associating a controller class with that standard
controller using "Extenssions"
85. How can you get the current
record id in a visualforce page ?
Ans
use ApexPages.CurrentPage().getparameters().get('id') to get the current record
id in visaulforce page.
86. Can a user change his own
profile in salesforce ?
Ans:
No, a user cannot change change his own profile !!
87. Can a user change his own role?
Ans:
Yes this can be done !!
88. Reset security token option is
unavailabel in set up. What could be the reason?
Ans:
If in the profile setting "login ip ranges" have been set up then the
option of "reset security token" is uanvailbale.
89. How can you skip record type
selection page(and take up default record type) while creating new
record of a aprticular object ?
Ans:
just tickmark against the object by navigating to following :
set up --> my personal information --
> Record type selection --> check against the required object
90. What are the different data
types that a standard field record name can have?
Ans:
Record name field can have either of the two data types : Auto Number or Text
data type
91. Can you edit a apex trigger/apex
class in production environment ?
Ans:
No apex trigger /class cannot be edited in production.
92. Can you edit a visuaflorce apge
in production environment ?
Ans:
Yes this can be done.
93.How can you deliver a visualforce
page in excel form ?
Ans:
use contentType="application/vnd.ms-excel#Contacts.xls" in page
component of visualforce page
94. What is trigger.new?
Ans:
It is a list of records in current context in a trigger.
95. What does it mean when you get
the error "too many soql queries 101 salesforce"
Ans:
It means you are hitting the limit of 100 soql queries as per governers limit
96. How can you create a input field
for date on a visualforce page ?
Ans:
To create a input date field on vf page you will have to bind it with a
existing date field on any object.
97. How can you convert a text to
upper string ?
Ans:
stringname.toUppercase();
98. How can you convert a integer
into a string ?
Ans:
string.valueof(integerName);
99. What are the different types of
email templates that can be created in salesforce?
Ans:
Test, HTML (using Letterhead), Custom (without using Letterhead) and
Visualforce.
100. How can you display different
picklist values for picklist fields in different page layouts?
Ans:
This can be done using record types.
101. Can you do a dml in constructor?
Ans:
No this cannot be done.
102. What are the data types that
can be returned by a formula field?
Ans:
1.Checkbox 2. currency 3.Date 4.Date/Time 5.Number 6.Percent 7.Text
103. Can you create a new profile
from scratch ?
Ans:
No, you have to clone from a existing profile and modify the settings as
required.
104. What are custom labels in
saleforce?
Ans
custom labels are custom text values that can be accessed from apex codes and
visualforce pages.
105. What is the character limit of
custom label ?
Ans:
Custom labels can be only 1000 characters long, not more than that.
106. How long can a sandbox name be?
Ans:
It can only be of up to 10 characters not more than that.
107. Can you use sharing rules to
restrict data access?
Ans
No, sharing rule can only give wider access to data it cannot restrict data
access.
108. Can you edit a formula field
values in a record?
And:
formula fields are read only and cannot be edited.
109. Can you edit roll up summary
field values in a record?
Ans:
No, roll up summary fields are read only and cannot be edited.
110. Ho can you create relationship
between two objects in salesforce?
Ans
relationship can be set up by crating either look up relationship field or
master detail relationship fields on objects.
111. Can you create a roll up
summary field on parent object?
Ans:
Roll up summary fields can only be created if the relationship between objects
is master detail type.
Salesforce Interview Questions - Latest - Part 1
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