多项选择题
Which two authentication mechanisms provide weaker protection than other mechanisms？（）
A. HTTP Basic Authentication B. Form Based Authentication C. HTTP Digest Authentication D. HTTPS Client Authentication
多项选择题 Whichthreeareguaranteedtobevalidfortheelementofawebapplicationdeploymentdescriptor？（）
多项选择题 Which the three EL expressions， inserted at line 15， are valid and evaluate to "3"？ （）
单项选择题 GivenaJSPerrorpage，whichimplicitobjectreferstotheuncaughtThrowablethatresultedinthepagebeinginvoked？（）
