Salesforce Apex Interview Questions

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Salesforce Apex Interview Questions

Top 10 Salesforce Apex Interview Questions for Success

Salesforce Apex Interview Questions

Salesforce Apex interview questions typically focus on assessing a candidate's knowledge and experience with the Salesforce platform, particularly with Apex, the programming language used in Salesforce. Questions may cover topics such as Apex syntax, classes, triggers, governor limits, database operations, test classes, and best practices for code optimization and maintenance. Interviewers may also ask about the candidate's experience with integrations, cloud computing, and problem-solving skills in the context of Salesforce development. Being prepared with a strong understanding of Apex fundamentals, hands-on experience with coding, and ability to communicate effectively about technical concepts will help candidates succeed in Salesforce Apex interviews.

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1 - How does Salesforce Governor Limits impact Apex code?   Governor Limits are Salesforce's way of ensuring fair usage and performance on the platform. Apex code is subject to these limits, such as limits on the number of SOQL queries, CPU time, and DML statements allowed in a single transaction. It is crucial for developers to be aware of these limits and design their code efficiently to avoid hitting them, which could result in runtime exceptions.

2) What is SOQL and how is it different from SQL?   SOQL (Salesforce Object Query Language) is similar to SQL (Structured Query Language) but is specifically designed to query Salesforce data. SOQL is tailored to work with Salesforce objects and fields, allowing developers to retrieve specific data from their Salesforce org. Unlike SQL, SOQL does not support features such as JOIN statements but instead provides relationships between objects using relationship queries and subqueries.

3) How can you handle bulk data processing in Apex?   Apex provides features like the Database.Batchable interface and the Queueable interface for handling bulk data processing effectively. Using these interfaces, developers can break down large data operations into smaller chunks, enabling them to process thousands or even millions of records without hitting Governor Limits. By implementing batch jobs or queueable jobs, developers can optimize the execution of their code and scale it to handle large volumes of data efficiently.

4) What are the different types of Apex triggers?   Apex triggers in Salesforce are classified into two types: Before triggers and After triggers. Before triggers are executed before the record is saved to the database and are commonly used for validation or modification of data before it is committed. After triggers, on the other hand, are executed after the record is saved to the database and are typically used for tasks like sending emails or updating related records post save.

5) How can you handle exceptions in Apex code?   Exception handling in Apex is crucial for designing robust and fault tolerant code. Developers can use try catch blocks to catch and handle exceptions gracefully, ensuring that their code can recover from unexpected errors. By using custom exceptions and Salesforce standard exceptions like DMLException or QueryException, developers can implement error handling logic to manage exceptions effectively and provide informative error messages to users.


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