Whichofthefollowingcommandsmakes／bin／fooexecutablebyeveryonebutwritableonlybyitsowner?()A.chmod557/bin/fooB.chmodo+rwx.a+rx/bin/fooC.chown557/bin/fooD.chmod755/bin/foo

题目
Whichofthefollowingcommandsmakes／bin／fooexecutablebyeveryonebutwritableonlybyitsowner?()

A.chmod557/bin/foo

B.chmodo+rwx.a+rx/bin/foo

C.chown557/bin/foo

D.chmod755/bin/foo

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    1、一个bash shell脚本的第一行是

    A．#/bin/csh

    B．#/bin/bash

    C．/bin/bash

    D．#!/bin/bash


    D

  • 第2题：

    RHEL默认使用的shell是（）

    A．/bin/tcsh

    B．/bin/bash

    C．/bin/sh

    D．/bin/csh

    E．/sbin/nologin


    高性能

  • 第3题：

    接上题，对这个4位二进制数转换BCD的设计进行仿真，下面代码输入激励信号编写可行的是（）。

    A.initial //编写激励信号 begin Bin=4'h0; #10 Bin=4'h1; #10 Bin=4'h2; #10 Bin=4'h3; #10 Bin=4'h4; #10 Bin=4'h5; #10 Bin=4'h6; #10 Bin=4'h7; #10 Bin=4'h8; #10 Bin=4'h9; #10 $stop; end#B.initial //编写激励信号 begin Bin=4'h0; #10 Bin=4'h1; #10 Bin=4'h2; #10 Bin=4'h3; #10 Bin=4'h4; #10 Bin=4'h5; #10 Bin=4'h6; #10 Bin=4'h7; #10 Bin=4'h8; #10 Bin=4'h9; #10 Bin=4'h10; #10 Bin=4'h11; #10 Bin=4'h12; #10 Bin=4'h13; #10 Bin=4'h14; #10 Bin=4'h15; #10 $stop; end#
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  • 第4题：

    CentOS默认使用的shell是（）

    A．/bin/bash

    B．/bin/sh

    C．/bin/csh

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    一个bash shell脚本的第一行是（）。

    A．#/bin/csh

    B．#/bin/bash

    C．./bin/bash

    D．#!/bin/bash


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