Updated May 18, 2023
Introduction to APEX Interview Questions and Answers
APEX is a proprietary programming language and is an object-oriented and strongly typed programming language. It was developed by Salesforce Inc., a Software Development Company and an American Cloud Computing company whose headquarters is based in San Francisco, California, USA. It was a publicly listed company in the USA under NYSE (New York Stock Exchange). APEX will allow the developers to execute the flow and the transaction control statements in the Salesforce platform server. All Salesforce programmers should highly recommend knowing APEX. It is essential to understand the Salesforce platform for APEX programming development.
APEX has a syntax similar to Java and works like stored procedures in a database. APEX is available with different kinds of editions of the Salesforce platform.
So if you have finally found your dream job in APEX but are wondering how to crack the APEX Interview and what could be the probable 2023 APEX Interview Questions, every interview is different, and the job scope is different too. Keeping this in mind, we have designed the most common APEX Interview Questions and answers to help you get success in your interview.
Below are the ten crucial 2023 APEX Interview Questions and Answers frequently asked in an interview. These questions are divided into parts as follows:
Part 1 – APEX Interview Questions (Basic)
This first part covers basic Interview Questions and Answers.
1. What is APEX, and what is it used for?
Salesforce developed APEX as a proprietary, strongly-typed, object-oriented programming language. It will be used to develop the products in Salesforce to perform transaction control statements and flow execution operations. The APEX’s syntax is similar to Java and can be used in web service requests.
2. What are the features of APEX?
APEX offers several features, including robust and stringent data integration, enabling the execution of multiple queries and statements concurrently. It is strongly typed, directly referencing the object schema to provide values. APEX also boasts an easy-to-use syntax derived from the Java programming language and facilitates seamless testing with simplified execution and test suite creation.
Let us move to the next APEX Interview Questions.
3. What are the applications of APEX?
The different types of applications of APEX are to create different kinds of services such as email, schedules, triggering, etc., creating various web services with integration of multiple systems and different services, performing validations on multiple schema objects and customized validation rules, creating customized business processes for the unavailable features.
4. What is the architecture of APEX?
These are the common APEX Interview Questions asked in an interview. The APEX architecture includes an application server and data storage. The network connects to the internet, and both end-users and developer users actively participate in making web server requests and handling compilation errors and validations. The platform’s application server compiles the source code into a sequence of instructions, and an Apex interpreter interprets it. The end-users will do the execution of the triggers. There will be no delay in the web service request to the application server platform.
5. What is APEX syntax?
APEX syntax has different features, such as a variable declaration to store the memory’s values. The queries will be like SOQL, which will be used to execute the queries, loop statements to perform the iterations in performing the operations, flow control statements can be used to control the flow execution whether to start or stop the execution process, DML statements can be used to manipulate the data by executing the queries.
Part 2 –APEX Interview Questions (Advanced)
Let us now have a look at the advanced Interview Questions.
6. What does the APEX development environment contain?
Developing an application in the Salesforce APEX development environment requires following various features and processes to ensure successful setup and customization based on the entity’s requirements. Developers have the option to develop the code either in a local developer edition or a Salesforce sandbox. Developers usually develop the code in a Sandbox environment and deploy it into production according to established standards.
The different operations that will be performed during the code development are developing the code and its compilation process, debugging the code, testing the code and application, performing the SOQL query execution and its efficiency, color coding, auto-alignment, and auto-completion of the build process. The main step of executing the code in Salesforce will include the login action into the Salesforce sandbox or console before performing these operations.
7. What are the different data types in APEX?
The different types of data types available in the APEX language are Primitive Data Types (Integer, Long, Double, Date, DateTime, ID, or Boolean and String), Collections (Lists, Maps, and Sets), and Enum Classes, Interfaces, and Objects. The Primitive data type Integer can be any value of a 32-bit number and will have some range similar to that of the Java programming language. A Boolean data type will have a true and false value.
The Date data type can only store the date value but not the time. The Primitive data type Long can be any value of a 64-bit number and will have some range similar to that of the Java programming language. The String data type is a set of characters that will be initialized within single quotes. The data type Blob also exists, which stores a binary data set. Enum is an abstract kind of data type.
8. What are the different Collections in APEX?
APEX’s different collection data structures are Lists, Maps, and Sets. A-List can have any type of data stored in it, such as primitives, collections, different types of complex objects, or schema objects. There will be different types of methods available in the lists to perform different operations, such as retrieving the size of the list, clearing the contents, getting the details of the list, and updating, deleting, and adding the records or values into it. The same functionalities exist for Set and Maps but with different functionalities.
9. What is SOQL in APEX?
These are the advanced APEX Interview Questions asked in an interview. SOQL is often called Salesforce Object Query Language, designed and developed to work with Salesforce Database.
10. What are the Security features of APEX?
APEX enforces different security rules to protect the application features and code while sharing data or running the code. Enforcing various security features and different levels of security is also necessary.
This has been a guide to the List Of Apex Interview Questions and Answers so the candidate can easily crack down on these Questions. In this post, we have studied the top APEX Interview Questions often asked in interviews. You may also look at the following articles to learn more –