Difference between BeforeClass and BeforeTest in TestNG

Question

As we know from official TestNG documentation:

@BeforeClass: The annotated method will be run before the first test method in the current class is invok

Answer 1

if you extend from another class this are the results:

parentTest - BeforeTest- parent     
testClass1 - BeforeTest- test1    
parentTest - BeforeClass- parent    
testClass1 - BeforeClass- test1    
parentTest - BeforeMethod- parent    
testClass1 - BeforeMethod- test1    
testClass1 - myTestMethod1    
testClass1 - AfterMethod- test1    
parentTest - AfterMethod- parent    
parentTest - BeforeMethod- parent    
testClass1 - BeforeMethod- test1    
testClass1 - myTestMethod2    
testClass1 - AfterMethod- test1    
parentTest - AfterMethod- parent
testClass1 - AfterClass- test1    
parentTest - AfterClass- parent
testClass1 - AfterTest- test1
parentTest – AfterTest- parent