To avoid reaching this limit, it’s recommended to use any of the following strategies. Q: What is the time limit for synchronous Apex requests? Discuss the strategies that can be used to avoid hitting the limit.Ī synchronous Apex request that is running for more than five seconds is considered to be long-running. If you set more than one SavePoint, then roll back to a SavePoint that is not the last SavePoint you generated, the later SavePoint variables become invalid.References to SavePoints cannot cross trigger invocations because each trigger invocation is a new trigger context.Each RollBack or SavePoint you set, counts against the governor limit for the DML statements.The ID on an sObject inserted after setting a SavePoint is not cleared after a RollBack.
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Static variables are not reverted during a RollBack.Here’s the most relevant limitations regarding transaction control. To maintain system performance and availability, the platform enforces process limits.Īll Salesforce developers must know these limits well because they affect how a solution should be engineered and coded. Salesforce is a multi-tenant environment, which essentially means that all resources are shared among its users. Q: Discuss the transaction control limitations in Apex. Salesforce occasionally revises these limits and adjusts the execution capabilities. There is no inherent limit on the number of items a collection can hold, although there is an implicit limit based on the heap size.ĭue to the multi-tenant nature of the environment, Salesforce maintains a table with all the limits. When you remove an item from a list, the index will shift left. It’s also worth mentioning that removing items from a set is more straightforward than removing an item from a list.
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Which type should you use? That depends on what you’re trying to accomplish and the characteristic of each collection type described above. Sets are unordered collections of elements that do not contain any duplicates (in contrast to Lists, as noted above). A key can be any primitive data type, and value can be a primitive, sObject, collection type, or an Apex object. Maps are collections of key-value pairs, where each unique key maps to a single value. It’s also important to note that lists can contain duplicates. Lists should be used when you want to identify an element by its index. Lists are ordered collections of elements that are distinguished by their indices.
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In Salesforce, Apex supports three different collection types: Lists, Maps, and Sets. Discuss their limits and characteristics. Q: Name the available collection types in Apex. In it, you’ll find our top Salesforce developer interview questions and answers. Most people won’t know the right questions to ask, which is why we put together this guide. You might also seek someone with experience in Salesforce Lightning. If you do need an expert-level Salesforce developer, you should seek someone who is not only fluent with SQL and Salesforce’s drag-and-drop tools, but a certified developer who also knows Apex and SOQL, Salesforce’s custom query and programming language.