Applications put computers to practical business （） , but below the （） it’s the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program, connect to networks and store （） .
A traditional kernel provides all the functions for applications. The kernel （） memory, I/0 devices and parcels out processor time.
The kernel also supports security and fault （） , which is the ability to recover automatically when parts of the system fail.

A:manages B:manage C:managed D:managing

Applications put computers to practical business （） , but below the （） it’s the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program, connect to networks and store （） .
A traditional kernel provides all the functions for applications. The kernel （） memory, I/0 devices and parcels out processor time.
The kernel also supports security and fault （） , which is the ability to recover automatically when parts of the system fail.

A:error B:question C:tolerance D:problem

Which of the following methods is used to increase the number of processes sharing the CPU? （）

A:Interrupt B:Scheduler C:Working Set D:Swapping

Which of the following statements describe(s)the properties of a purely segmented memory system? （） ．
Ⅰ．It suffers from internal fragmentation
Ⅱ．It permits implementation of virtual memory
Ⅲ．It divides memory into units of equal size

A:Ⅰ only B:Ⅲ only C:Ⅱ only D:Ⅰand Ⅲ

In the WAN，when a point-to-point subnet is used，an important design issue is the roucer interconnection （）

A:topology B:computer C:service D:lines

（） is a sequence of letters and digits,the first character mustbe a letter.

A:An identifier B:A string C:An array D:program

深度为5的二叉树至多有（）个结点。

A:31 B:32 C:16 D:10

声卡的主要功能是控制声音的输入和输出，包括波形声音的获取、重建和播放，以及MIDI的输入、合成和播放等。下面是有关声卡的叙述。
Ⅰ.波形声音的质量仅与采样频率有关
Ⅱ.MIDI声音的质量取决于采用的声道数
Ⅲ.波形声音的获取和重建是两个互逆的过程，也就是数字声音和模拟声音信号互相转换的过程
Ⅳ.PCI声卡的性能比ISA声卡的性能高
上述叙述中，（）两个是正确的。

A:Ⅰ和Ⅱ B:Ⅰ和Ⅲ C:Ⅱ和Ⅲ D:Ⅲ和Ⅳ

To accommodate the longest path allowed by 802.3，the slot time has been set to 512 bitt times，or （）

A:521μs B:5.12μs C:0.512μs D:512μs

为了缩短指令中某个地址段的位数，有效的方法是采取（）。

A:立即寻址 B:变址寻址 C:间接寻址 D:寄存器寻址