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Salesforce Collections: List, Set, Map Collections are the group of similar types. There is no limit on the number of items a collection can hold. However, there is a general limit on heap size. There are three types of Salesforce collections. List Set Map 1. List: List is an ordered collection of elements which will allow duplicates. A list is an ordered collection of typed primitives SObjects, user-defined objects, Apex objects or collections that are distinguished by their includes. The index position of the first element in a list is always '0' List elements can be of any data type: primitive types, collections, sObjects, user-defined types, and built-in Apex types. A list is an ordered collection of elements that are distinguished by their indices. To declare a list, use the list. keyword followed by the primitive data, SObject, nested list, map, or set type within < >characters. List Syntax: List<datatype> listName = new List<datatype>(); Note:-  Simil...

  Roll-Up Summary Fields   A roll-up summary field calculates values from related records, such as those in a related list. You can create a roll-up summary field to display a value in a master record based on the values of fields in a detail record. The detail record must be related to the master through a master-detail relationship. For example, you want to display the sum of invoice amounts for all related invoice custom object records in an account’s Invoices related list. You can display this total in a custom account field called Total Invoice Amount. Steps to Create a Roll-Up Summary Field: Create a custom field on the object where you want the field displayed. Summary fields summarize the values from records on a related object, so the object on which you create the field should be on the master side of a master-detail relationship. For instructions on creating a custom field, see Create Custom Fields. Choose the Roll-Up Summary field type, and click Next. Enter a fiel...

Asynchronous Apex in Salesforce  Asynchronous Apex is used to run processes in a separate thread, at a later time. An asynchronous process is a process or function that executes a task "in the background" without the user having to wait for the task to finish. Here’s a real-world example. Let’s say you have a list of things to accomplish before your weekly Dance Revolution practice. Your car is making a funny noise, you need a different color hair gel and you have to pick up your uniform from your mom’s house. You could take your car to the mechanic and wait until it is fixed before completing the rest of your list (synchronous processing), or you could leave it there and get your other things done, and have the shop call you when it’s fixed (asynchronous processing). If you want to be home in time to iron your spandex before practice, asynchronous processing allows you to get more stuff done in the same amount of time without the needless waiting. Increased Governor and Exec...

Salesforce Admin Interview Questions and Answers Q. What is the Cloud computing? - "Cloud Computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction." Cloud computing is the on-demand availability of computer system resources, especially data storage and computing power, without direct active management by the user. Large clouds often have functions distributed over multiple locations, each location being a data center.   More info about Cloud Computing    Q. What are the characteristics of Cloud Computing? - On-demand, Scalable, Multi-tenant, Reliability and Utility based subscription. Q. What are the different types of clouds? 1. Public Cloud 2. Private Cloud 3. Hybrid Cloud Q. What is Public cloud? - A service provider makes resources, such as applications and storage, available to ...