Which of the following statements are true about components of dynamic Apex? -> Schema describe is a way to program matically learn about the metadata of your data model within Apex.
-> Dynamic SOQL refers to the creation of a SOQL string before runtime within an Apex script, -> In dynamic SQQL, you use Sring.escapeSinqIeQuoLes (sLrng)to prevent SQQL injection.
-> You can use dynamic SOSL to create a tree structure of all the objects and fields in your schema browser.
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A. B. C. D.B.
Sure, I'd be happy to provide a detailed explanation of the components of dynamic Apex and which statements are true.
Dynamic Apex refers to the ability to write code that can adapt to changing circumstances at runtime. It provides the ability to create, modify, and delete objects, fields, and classes dynamically. It consists of several components that allow you to write flexible code that can interact with the metadata of your data model at runtime.
Here are the explanations of each statement and whether they are true or false:
A. In, like, and, or, not, group by, order by, all rows, limit This statement is not related to the components of dynamic Apex. These are the keywords used in SOQL (Salesforce Object Query Language) to perform queries on Salesforce objects.
B. Schema describe is a way to program magically learn about the metadata of your data model within Apex. This statement is true. The Schema.describe methods in Apex allow you to programmatically access metadata about your data model. For example, you can use the Schema.describeSObjects method to get information about the fields, child relationships, and picklist values for a particular object.
C. Web service methods must be static, webservice methods cannot be overloaded This statement is not related to the components of dynamic Apex. However, it is true that web service methods in Apex must be declared as static and cannot be overloaded.
D. Create complex functionality declarative features cannot provide. This statement is true. Dynamic Apex allows you to create complex functionality that cannot be achieved using declarative features like the point-and-click interface of the Salesforce Setup menu. For example, you can use dynamic Apex to create custom validation rules, triggers, and workflow rules that execute complex business logic.
Now, let's briefly explain the other components of dynamic Apex:
Dynamic SOQL: Refers to the creation of a SOQL string before runtime within an Apex script. It allows you to execute a query that is not known at compile-time. This is useful when you need to query records based on user input or dynamically change the query conditions based on certain conditions.
String.escapeSingleQuotes: A method that allows you to escape single quotes in a string to prevent SQL injection attacks. You can use this method to sanitize user input before using it in a dynamic SOQL query.
Dynamic SOSL: Refers to the creation of a SOSL (Salesforce Object Search Language) string before runtime within an Apex script. It allows you to search across multiple objects in a single query and return a list of records that match the search criteria.
Overall, dynamic Apex is a powerful feature of Salesforce that allows developers to write code that can adapt to changing circumstances at runtime. It provides the ability to create, modify, and delete objects, fields, and classes dynamically, and allows developers to create complex functionality that cannot be achieved using declarative features.