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  3. 2018年05月系统分析师考试上午真题【基础知识】
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2018年05月系统分析师考试上午真题【基础知识】

【61】运用互联网技术,在系统性能评价中通常用平均无故障时间(MTBF)和平均故障修复时间(MTTR)分别表示计算机系统的可靠性和可用性,下列(61)表示系统具有高可靠性和高可用性。

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【62】MPEG-7是ISO制定的(62)标准。

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【63】彩色视频信号数字化的过程中,利用图像子采样技术通过降低对(63)的采样频率,以达到减少编码数据量的目的。

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【64】主机host1对host2进行域名查询的过程如下图所示,下列说法中正确的是(64)


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【65-66】某公司网络的地址是192.168.192.0/20,要把该网络分成32个子网,则对应的子网掩码应该是(65),每个子网可分配的主机地址数是(66)

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【67】以下关于网络布线子系统的说法中,错误的是(67)

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【68】在层次化园区网络设计中,(68)是汇聚层的功能。

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【69】假如有3块80T的硬盘,采用RAID5的容量是(69)

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【70】网络安全体系设计可从物理线路安全、网络安全、系统安全、应用安全等方面来进行。其中,数据库容灾属于(70)

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【71-75】During the systems analysis phase, greater user involvement usually results in better communication, faster development times, and more satisfied users.There are three common team-based approaches that encourage system
users to participate actively in various development tasks.1)(71)is a popular fact-finding technique that brings users into the development process as active participants. The end product of the approach is a requirements model.2)(72)is a team-based technique that speeds up information systems development and produces a functioning information system. The approach consists of several phases.The(73)combines elements of the systems planning and systems analysis phases of tbe SDLC.Users, managers, and IT staff members discuss and agree on business needs, project scope, constraints, and system requirements.During(74),users interact with systems analysts and develop models and prototypes that represent all system processes, outputs, and inputs.3)(75)attempt to develop a system incrementally by building a series of prototypes and constantly adjusting them to user requirements.

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