Friday, May 13, 2016

Salesforce Interview Questions-Data Management Part-1

1. Is it necessary to define an explicit primary key in custom objects?
No. Every object has a standard field called id. There is no need to define an explicit primary key in custom objects. The standard id field can be used as primary key.

2. In which order, we upload data in salesforce for related objects?
When loading data into a salesforce application dependencies between objects determine the order in which objects are loaded. If there is a one-to-many relationship between A and B, the data for A should be loaded before the data for B.

3. What is Upsert and how external id are beneficial?
Upsert is an API function that combines insert and updates into a single call. Upsert uses an indexed custom field or external ID to determine whether to create a new object or update an existing object.
-If the external ID is not matched, then a new object is created
-If the external ID is matched once, then the existing object is updated
-If the external ID is matched multiple times, then an error is reported
Use Upsert when importing data to prevent the creation duplicates.

4. What is import wizard?
It is easy to use tool to load Accounts, Contacts, Leads, Solutions, or Custom Objects.
-Load 50,000 records or less.
-Prevent duplicates
-Doesn’t support all standard object but supports all custom object

5. Which is API based tool supported by Salesforce and what are its advantages?
Apex Data Loader

Advantages are:-
-Is a fully supported product.
-Supports import from CSV or export to CSV.
-Can be used to import or export more than 50,00 records.
-Supports loading from or exporting to a database via JDBC.
-Supports custom relationships for upsert.
-Can be run from command line.


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