Question 6 of 122Which one of the following API methods exists in Magento? Question 7 of 122Which one of the following classes must you extend in order to implement a custom indexer? Question 8 of 122Which two EAV attribute frontend_input types make use of source models? (Choose two) Question 9 of 122What is the difference in the effect of calling the invoice capture ( ) method versus the invoice pay ( ) method? Question 10 of 122How is the sort order in which total models collect their values specified?