A developer is building a Visualforce page that interacts with external services.Which interface should the developer implement to test this functionality? (Choose two.)
A developer needs to create a Lightning page for entering Order Information. An error message should be displayed if the zip code entered as part of the Order's shipping address is not numeric.What is a recommended way for the error message be displayed to the end user?
A developer is writing unit tests for the following method:public static Boolean isFreezing(String celsiusTemp){ if(String.isNotBlank(celsiusTemp) && celsiusTemp.isNumeric()){ return Decimal.valueof(celsiusTemp) <= 0; } return null; }Which assertion would be used in a negative test case?
During the order of execution of a Visualforce page GET request, what happens after this step?Evaluate constructors on controllers and extensions
A developer needs to create a service that will process an email sent to it and create an account and contact using the contents of the email as data for the records.How might a developer accomplish this requirement?
A Visualforce page loads slowly due to the large amount of data it displays.Which strategy can a developer use to improve the performance?
