The UNIX operating system is made up of three parts; the kernel, the shell and the programs. The kernel of UNIX is the(71)of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to(72). The shell acts as an(73)between the user and the kernel. When a user logs in, the(74)program checks the username and password, and then starts another program called the shell. The shell is a command line(75)(CLI). It interprets the commands the user types in and arranges for them to be carded out. The commands are themselves programs: when they terminate, the shell gives the user another prompt(% on our systems).
A.hub
B.center
C.core
D.nucleus
第1题:
A、Disk、Operating、System
B、Daily、Operating、System
C、Disk、Open、System
D、Date、Open、System
第2题:
A.dump-tcore
B.stringscore
C.trace-acore
D.crashcore/unix_up
第3题:
Unix和Linux有很多种不同的外壳,称为Shell,如csh,ksh,bsh, bash等。
第4题:
下列关于UNIX操作系统的说法,错误的是( )。
A.UNIX采用进程对换的内存管理机制
B.UNIX是由Shell语言编写的
C.UNIX是多用户系统
D.UNIX采用树形文件系统
第5题:
以下程序段的输出结果为( )。 int j=2 switch (j){ Case 2: system.out.print("two."): Case 2+1: System.out.println("three."); break: default: System.out.println (“value is”+j): Break }A.B.two
A.two.three.
B.two
C.three
D.value is 2
第6题:
Linux内核中的系统调用总数定义在哪个文件中()
A.include/linux/sys.h
B.kernel/system_call.s
C.kernel/sys.c
D.include/unistd.h