【单选题】Design a logic expression Y=AB'+BC'by using a 3-line-to-8-line decoder 74LS138 and necessary gates. when the MSB ofinputs is A and LSB of inputs is C, how should we connected the outputs?(______).使用3线...
A.
use AND gate connected outputs 2,4,5,6. 使用“与”门连接2、4、5、6号输出。
B.
use NOR gate connected outputs 2,4,5,6 使用“或非”门 连接2、4、5、6号输出。
C.
use NAND gate connected outputs 1,2,3,5. 使用“与非”门 连接1、2、3、5号输出。
D.
use NAND gate connected outputs 2,4,5,6 使用“与非”门 连接2、4、5、6号输出。
【单选题】已知有如下代码: import java.util.*; public class Test{ public static void main(String... args){ List list=new LinkedList(); list.offer("hello"); list.offer("welcome"); System.out.println(list); } } 关于下列代码说法正...
A.
编译失败,因为list是一个列表不是队列,无法调用offer方法
B.
编译成功,运行成功,因为list.offer("hello");根据多态性,绑定为LinkedList对象的offer方法
C.
编译成功,运行失败,根据动态性,list无法调用LinkedList的offer方法
【单选题】The circuit shown will have identical logic out if all gates are changed to
【单选题】There are six basic logic gates: AND, OR, NOT, NAND, NOR, and XOR.
【单选题】The two types of gates which are called universal gates are
【单选题】All Boolean expressions can be implemented with ( )
C.
combinations of NAND and NOR gates
D.
combinations of AND gates, OR gates, and inverters