What kind of filter is used to extract a single-freq. harmonic from the harmonic components contained in square wave? A: Low-pass Filter B: High-pass Filter C: Band-pass Filter D: Band-elimination Filter

Which two statements are true about traffic shaping and traffic policing？（） A: both traffic shaping and traffic policing cause retransmissions of connection-oriented protocols such as TCP B: both traffic shaping and traffic policing support the marking and re-marking of traffic C: the effects of traffic shaping and traffic policing when configured on a router are applied to outgoing traffic D: traffic shaping queues excess traffic whereas traffic policing discards excess traffic E: traffic shaping allows the traffic to exceed the bit rate whereas traffic policing prevents the traffic from exceeding the bit rate

We can employ the next filters to detect edges from an image: A: Roberts filter B: Sobel filter C: mean filter D: Gaussian filter

The filter [img=142x47]18031c9cd67f894.png[/img] is a lowpass filter

The following are not road traffic signals ( ). A: traffic light B: traffic sign C: traffic information board D: traffic police command

下列关于Filter的描述中，正确的是 （）。 A: Filter只能过滤页面 B: Filter只能过滤Servlet C: Filter程序必须实现Filter接口 D: 一个web应用只能注册一个Filte

Children should be taught to read __________ A: traffic signs B: traffic island C: traffic jam D: traffic police

filter ____

在一个Filter中，处理filter业务的是（）方法

编写一个Filter，需要（ ）。 A: 实现Filter接口 B: 继承HttpFilter类 C: 实现HttpFilter接口 D: 继承Filter类