SALESFORCE INTERVIEW QUESTIONS AND ANSWERS

15.Workflow rule and evaluation criteria.

Workflow rule criteria:

Workflow rule are set of instructions specify the criteria for when the workflow should be activated

Workflow evaluation criteria:

1. When record is created.
2. When record is created and every time it’s edited.
3. When record is created and any time it’s edited to meet the criteria.

 

16. Difference  between “record is created and edited” and “record is created and every time it is edited when meet the criteria” in workflow evaluation criteria.

 

17.What  is Report?

A report is a list of record that meet the criteria we define and it is display in row and column or we can say in tabular form. Every report stored in a folder, folder can be Public, hidden or shared. We can control who can access the content of folder based on role, permission, public group and license type.

Types of report-

1. Tabular report
2. Summary report
3. Matrix report
4. Joined report

Tabular report:

We can only display grand total in table form.

Summary report:

It is detail form of reports in which grouping is done based on columns. It allows grouping of rows of data.

Matrix report:

This is the most complex and detail form of  reports in which grouping is done based on rows and columns.

Joined report:

We can join two or more reports in a single report display in form of blocks.

18.What  is Dashboard?

Dashboard is graphical representation of reports. It can be generated for summary and matrix reports. It display data as per last time report was run and it has 20 components.

Types of Dashboard-

1. Chart
2. Table
3. Metric
4. Gauge

 

19.What  is Data Security?

In Data security you can control which user have to access to which data in your whole organization, a specific object, a specific field or an individual records.

Types of data security level:

1. Organization level security
2. Object level security
3. Field level security
4. Record level security

Organization level security:

For your whole organization, you can maintain a list of authorized users, set password policies and limit login to certain hours and locations.

Object level security:

You can prevent a group of users from creating, viewing, editing or deleting any record of that objects. For example-

            You can use object permission to ensure that Interviewer can view position and job application but not edit or delete them.

Field level security:

You can restrict access of certain field, even if a user can access to the object. For example-

            You can make a salary field in a position object invisible to Interviewer but visible to hiring manager and recruiter.

Record level security:

You can allow a particular user to access the object, but then restrict the individual object records they are allow to see. For example-

             An interviewer can see and edit their own review, but not the reviews of other Interviewers.

 

You can manage record level access in following four ways–

1. OWD(Organization Wide Default)
2. Role Hierarchy
3. Sharing rule
4. Manual Sharing

OWD:

OWD sharing setting give you a base line level of access for each object and enable you to extend that level of access using hierarchy and sharing rule. Organizational Wide Defaults are used to restrict access.

There are four levels of access that can be set:

• Public Read/Write/Transfer(only available for leads and cases)
• Public Read/Write
• Public Read only
• Private

Role Hierarchy:

A role hierarchy represents a level of data access that a user or group of users needs. Users assigned to roles near the top of the hierarchy (normally the CEO, executives, and other management) get to access the data of all the users who fall directly below them in the hierarchy.

Sharing rule:

 

Manual sharing:

Manual sharing is sharing via a button on the record. This is only available to the record owner or users above that user in the hierarchy. For example-

                    If the record is only visible by me as the owner but I need to give access to someone else to review the opportunity for example, I can grant them access using this button. 

20.What is Visualforce?

Visualforce is the component based user interface framework for the force.com. The framework include tag based markup language, similar to HTML.Visualforce use the traditional MVC(Model View Controller) paradism with the option to use auto generated controllers for database objects provide simple and right integration. You can write your own controller, or extension to controller using Apex code. It has 100 built in component and mechanism whereby developer can create their own component.

21.Define Visualforce tag Action support, Action function, Action pooler, Repeat, Table.

Action support:

Action support add AJAX support to other component. Action support allow the component to call a controller method directly when a particular event occour. For example- OnClick, OnBlur etc.

Action function:

Action function call a controller method with the help of Javascript method when any event occour. Action support first call Javascript method then Javascript method call controller method.

Action poller:

Action poller is a timer that send AJAX request to the server according to time interval that you specify. Each request can result in a full or partial page update. An <apex: action poller> must be within the region it acts upon.

Repeat:

An itteration component that allow you to output the content of acollection according to a structure that you specify. The collection can include upto 1000 items.

Table:

 

22.What is Apex trigger?

Apex trigger enable you to perform custom action before or after event to records in Salesforce, such as Insert, Update and Delete. Apex trigger perform opration based on specific condition, to modify related records or restrict certain oprations from happening.

Event perform by Apex trigger:

1. Before Insert
2. Before Update
3. Before Delete
4. After Insert
5. After Update
6. After Delete
7. After Undelete

Types of trigger:

1. Before trigger
2. After trigger

Before trigger: Update or validate record values before they are saved to database.

After trigger: After trigger are used to access field values that are set by the system, and effect changes in other records.

Syntax-

                  Trigger triggerName on objectName (triggerEvent)

                              {

                                    Code Block

                              }

23.What is context variable in Apex trigger?

To access the record that are caused the trigger to fire , use context variable. Trigger can fire when one record is inserted or when many records are inserted in bulk via API or Apex.

Example-

Trigger.New– It contains all the records that were inserted in insert or update trigger .

Trigger.Old– It’s provide the old version of Objects before they were updated in update trigger

List of different context variable:

1. isExecuting
2. isInsert
3. isUpdate
4. isDelete
5. isBefore
6. isAfter
7. isUndelete
8. new
9. newMap
10. old
11. oldMap
12. size

 

24.What is Apex?

Apex is a programing language that uses java like syntax. Apex allow developer to add bussiness logic to system events, such as ButtonClick, Updates of related record and Visualforce pages. It is a developent platform for building SaaS application on top of Salesforce.com’s CRM fuctionality. Apex include API that developer can use to access user data on salesforce.com.

Apex platform consist of three tools:

1. Apex Builder- It is an on-demand component that allows easy,drag and drop customisation with a limited set of features.
2. Apex API- It is a method of retreiving raw data from salesforce.com server.

 

1. Apex Code- It is fully featured programming language that is executed on salesforce.com’s server. It is built in method for accessing user data.

 

25.Collections in Apex.

1. List
2. Set
3. Map

List- List holds an order collection of objects. You can add elements to a list when creating         the list or after creating the list by calling the add( ) method.

            list<string>colors = new list<string>();

            string[]color = new list<string>();

Set- A set is an unordered collection of objects that doesn’t contain any duplicate values.

           set<string>s = new set<string>();

Map- It is a collection of key-value pairs, where the key are primitive data type. Use map when you want to store values that are to be referenced through a key.

           Map<integer,string> empAdd =new map<integer,string>();

 

26.What is SOSL and SOQL?

SOSL: SOSL(Salesforce Object Search Language) API isused to search you organization’s salesforce data.

SOQL: SOQL(Salesforce Object Query Language) is used to built custom UI for salesforce.

 

27.Diffrence between SOSL and SOQL.

SOSL	SOQL
SOSL  is used to search your organization’s salesforce data.	SOQL is used to built custom UI for salesforce.
Using SOSL we can search on many object at atime.	Using SOQL we search only on one object at a time.
We can query on field whose data type is text, phone and email.	We can query on fields of any data types.
We can use SOSL in class but not in trigger.	We can use SOQL in triggers and class.
We can not perform DML operation on search result.	We can perform DML operation on query result.

 

28.What is Apex controller?

 

29.Types of Apex controller.

There are three types of Apex controller-

1. Standard controller
2. Custom controller
3. Extension controller