Following are built in exceptions present in apex.
AsyncException – Any problem with an asynchronous operation, such as failing to enqueue an asynchronous call.
CalloutException – Any problem with a Web service operation, such as failing to make a callout to an external system.
DmlException – Any problem with a DML statement, such as an insert statement missing a required field on a record.
EmailException – Any problem with email, such as failure to deliver. For more information, see Outbound Email.
InvalidParameterValueException – An invalid parameter was supplied for a method or any problem with a URL used with Visualforce pages.
LimitException – A governor limit has been exceeded. This exception can’t be caught.
JSONException – Any problem with JSON serialization and deserialization operations. For more information, see the methods of System.JSON, System.JSONParser, and System.JSONGenerator.
ListException – Any problem with a list, such as attempting to access an index that is out of bounds.
MathException – Any problem with a mathematical operation, such as dividing by zero.
NoAccessException – Any problem with unauthorized access, such as trying to access an sObject that the current user does not have access to. This is generally used with Visualforce pages.
NoDataFoundException – Any problem with data that does not exist, such as trying to access an sObject that has been deleted. This is generally used with Visualforce pages.
NoSuchElementException – Used specifically by the Iteratornext method. This exception is thrown if you try to access items beyond the end of the list. For example, if iterator.hasNext() == false and you call iterator.next(), this exception is thrown.
NullPointerException – Calling method on a object who’s value is null
QueryException – Any problem with SOQL queries, such as assigning a query that returns no records or more than one record to a singleton sObject variable.
RequiredFeatureMissing – A Chatter feature is required for code that has been deployed to an organization that does not have Chatter enabled.
SearchException – Any problem with SOSL queries executed with SOAP APIsearch() call, for example, when the searchString parameter contains less than two characters.
SecurityException – Any problem with static methods in the Crypto utility class. For more information, see Crypto Class.
SerializationException – Any problem with the serialization of data. This is generally used with Visualforce pages.
SObjectException – Any problem with sObject records, such as attempting to change a field in an update statement that can only be changed during insert.
StringException – Any problem with Strings, such as a String that is exceeding your heap size.
TypeException – Any problem with type conversions, such as attempting to convert the String ‘a’ to an Integer using the valueOf method.
VisualforceException – Any problem with a Visualforce page. For more information on Visualforce, see the Visualforce Developer’s Guide.
XmlException – Any problem with the XmlStream classes, such as failing to read or write XML.
Latest posts by Gopal Das (see all)
- Salesforce Certified Platform Developer I – Winter ’18 Release Exam - November 23, 2017
- Salesforce Certified Platform App Builder – Winter ’18 Release Exam - November 22, 2017
- Salesforce Certified Administrator – Winter’ 18 Release Exam - November 21, 2017