General SFDC API questions2

Question 1

What Is a Salesforce Call In?

Answer 1

Call In is used for exposing our webservices for other users

Question 2

What Is a Salesforce Call Out

Answer 2

Call Out is used for invoking or consuming our webservices for others

Question 3

How Soap Can Be Accessed ?

Answer 3

SOAP communicates through the WSDL file, without WSDL file we can’t do integration.

Question 4

What is the message format for SOAP?

Answer 4

XML

Question 5

How To Do Callout Integration ?

Answer 5

Generate WSDL code from class

Question 6

How do you read the Root Element In the Xml Dom?

Answer 6

getroot element

Question 7

How do you read the all the child elements In the Xml Dom?

Answer 7

getchild element

Question 8

How do Soap And Rest communicate?

Answer 8

1. SOAP communicates through the WSDL file

2. REST communicates through the HTTP file

Question 9

What are the methods in Rest?

Answer 9

1. HTTPGET
2. HTTPPUT
3. HTTPPOST
4. HTTPDELETE

Question 10

Which message formats does REST Supports

Answer 10

REST supports both:

1. XML
2. JSON

Question 11

What is an external id in salesforce?

Answer 11

An external id is a custom field which can be used as a unique identifier in a record. External ids are mainly used while importing records/ data. When importing records, one among the many fields in those records needs to be marked as an external id (unique identifier).

Question 12

Which all field data types can be used as external ids?

Answer 12

An important point to note is that only custom fields can be used as external ids. The fields that can be marked as external ids are text, number, e-mail and auto-number.

Question 13

How many callouts to external service can be made in a single apex transaction?

Answer 13

Governor limits will restrict a single apex transaction to make a maximum of 100 callouts to an http request or an api call.

Question 14

What Is Salesforce SOQL?

Answer 14

A query language that allows you to construct simple but powerful query strings and to specify the criteria that should be used to select the data from the platform database. SOQL Stands for Salesforce Object Query Language.

Question 15

What are the types of SOQL statements in salesforce?

Answer 15

Salesforce object query language is used to query that records from the database.Com based on the requirement.

There are 2 types of SOQL statements:

1. Static SOQL
2. Dynamic SOQL

Question 16

What is a WSDL?

Answer 16

WSDL stands for Webservices Description Language.

It contains types, messages, port types, and Binding.

Question 17

Trigger is an Apex Code that executes before or after.

Answer 17

The following types of DML Operation:
o	Insert
o	Update
o	Delete
o	Merge
o	Upsert
o	Undelete

Question 18

What are the limitations of WSDL file?

Answer 18

The file must be in the .WSDL extension.

1. Multiple port types and binding will not be allowed
2. Import and Inheritance operations are not supported

Question 19

How to do callout integration?

Answer 19

Generate WSDL code from the class

Path: setup\develop\apex class

Question 20

What is the difference between SOQL vs SOSL in salesforce?

Answer 20

SOQL- Salesforce Object Query Language
o Using SOQL we can Search only on one object one time.
o We can query on all fields of any data type
o We can use SOQL in the Triggers and the classes.
o We can perform DML operation on SQL query results.

SOSL(Salesforce Object Search Language)
o Using SOSL we can search on many objects at one time.
o We can query only on fields whose data type is text, phone, and Email.
o We cannot use in Triggers but can in classes.
o We cannot perform DML operation on search results.

Question 21

What Is Json?

Answer 21

JSON stands for JavaScript Object Notation. JSON is light weight compared to XML.

Question 22

What does Protocol mean?

Answer 22

Protocal contains a set of instructions or rules.

Question 23

How many ways are there for XML parsing?

Answer 23

They are two ways of XML parsing:

1. XML streams
2. XML DOM