2022年全国计算机等级考试二级公共基础最新题库 .pdf

management systems and measures establishe d by, and a number of pragmatic, combined part-time workforce education i nformation, the protection of the digital campus construction and sustainable development. Six Bureau attaches great importance to information technology security, infor mation technology security, entrust XX City Center for educational information and equi pment dedicated to the work. Network security leading group was set up, chaire d by the Education Bureau Chief, head, for XX education Metro-network and information security emergency response leadership. Deputy group leader for XX educational metropolitan area network and information security emergency response coordination, command. The team assist leader and deputy leader, responsible for network XX network security and i nformation . eam. Information security work Conference held each semester, a nd deployment ofnformation security of documents issued on a regular basis. Information security assessment is incl uded in the annual index. Strictly implement the information security budget to ensure information security of investment. By XX, education information and equipment Centre XX network network security and information security. According to the information technology security requirements, issued a document requires schools (units) implement, defined the information security guidelines, specific work practices, procedures, and requirements. Clear industry information security incidents (accidents) to detect, report a nd disposal processes. A ccording to self-examination, the school (units) basic established has network security management system; the school (units) according to this units actual, established has units personnel management, information system room management, and equipment management, and media management, and network security construction management, and shipped dimensi on management, and service outsourcing, management system; developed has computer and the network of network security responsibility held system, signed has network security responsibility; website of information management personnel is responsible for confidential management, password management, on computer enjoys independent right, User name and passwor d of the computer for its proprietary, and release of provisions is prohi bited, such as leaks, investigated for responsibility. According to who is in charge of whos in charge, who i s running and who is responsible for, who uses principles of who is in c harge of management schools (units) defined the roles and responsibilities of information security, assurance responsibilities to schools. XX city schools (units) total site 20, 19 of which were not classified security protection assessment, of which 1 (XX education and resource network) for classified security protection levels, without third-level information systems. otal education i nformation systems 1 (XX education cloud platform), contains features with e-Government, resource library, test database, mail services, such as e-book s, all intranet services. No for grade protection grading record and evaluation of school (units), requirements the school (units) according to information securi ty grade protection about policy and standard, organization carried out information security grade prote ction security management system construction, and technology measures construction and grade evaluation, implementation grade protection system of the requirements, makes information system security management level obviouslyfacility up to 160 million Yuan, according to the standard, high quality planning XX educational metropolitan area network realizes Wan Zha okuan to schools, hundreds of megabytes of broadba nd to the table, wire (ie: Web, vi deo, audi o) to the target, electronic whiteboards, multimedia classr ooms, remote interactive video teachi ng system of modern educationalequipment in the cla ssroom. . Wit h Intel company on XX E ducation City domain network of topic case de sign, relies on Cisco company thought Shu aid chuan project staff free provides has three years technology support, from 2009 began, according to high st andards, and high of work thought, and manpower planning, and points step implementation, using school earthquake Hou reconstruction of opportunities, again planning elementary and middle schools campus network and education city domain network, and l ocal broadcasting network company cooperation, using broadcast TV network, will physi cal fiber laying to each school, to minimum of cost achieved has physical fiber school school pass; Each school construction standards of campus network and network access to all rooms; XX education metropolitan area network center machine room equipment in the Ministry of education standardization management platform, the Central Library of audio-visual e ducation resources, set up a Chinese teacher education cloud platform, implemented links the two platforms. At present, the citys primary and middle school students to computer 3198, vitality than 10:1; 809 equipment classes through the classroom (primary and secondary); 36 of the campus network. The establishment of an advance d, practical Gigabit educational metropolitan area network, the citys schools have access to educational metropolitan area network, schools have computer networks, closed-circuit television network, broadcast networks into the classrooms, realize the triple play. Schools share Internet bandwidth, can me et the needs of teaching of the school office and at any time. According to Ministry of education on full started implementation teachi ng points digital education resources full cover project of notification (taught technical letter (2012) 74th,) and XX Province Department of education on issued XX province teachi ng points digital education resources full cover project implementation views of notification (chuan taught letter (2013) 18th,) requirements, I city 6 a teachi ng points implementation teaching points digital education resources full cover project, combined I city specific situation, developed issued has XX City Burea u on teaching points digital resources full cover project of implementation programme, Established XX, full coverage of digital resources in modern di stance education teachi ng pr oject leading group, XX, chaired the Se cretary for education. E stablished, digital resources in modern distance education teaching, XX full coverage proje ct group, XX, Direct or of the Center for educational information and equipment chaired Zhu Guiyan, responsible for distance education digital resources covering project work. Projects in XX city school digital resources in modern distance education teaching full-coverage proje ct leading group, digital resources in modern distance education teaching, and XX full coverage project group leadership and organization, in accordance with the unified arrangement of the whole province, responsible for university education digital resources covering proje ct management and implementation. According to provinces arrangements, I Center has arrangements Gongimprove, security prevention capacity obviously enhanced, security hidden and security accident obviously reduced, effective guarantees information health development. XX E ducation Centre regularly carry out day-to-day network security monitoring information and equipment. By the appropriate technical staff, XX network engine room maintenance staff on site management and maintenance on a regular basis, scheduled viewing of networks, systems, databases and associated equi pment operating conditions, and make a record. Computer lab maintenance managers regularly run a variety of devices in the school information system parameters, server systems and various data backup, so t hat there was a hardware failure in a system crash can resume qui ckly and efficiently. Computer lab maintenance managers establish a network antivirus system, Avira Virus system on a regular basis, and anti-virus software security a ssessment, time to upgrade. Computer lab maintenance management for all equipment in the room a regular dust, replace the old label. Regularly host servers, network switches, core routing, firewalls, hardware maintenance, such as equi pment failure, should be proce sse d in a timely manner in order to ensure safe and reliable operation of the system. In XX city information and equipment was established within the Centre, educational metropolitan area network center machine room XX. Servers and data stores and applications to set up in XX City metropolitan area network center machine room. WindowsServer2003, windowsServer2008, windowsServer2012, Linux, the operating system, the database for SQL Server2008, Office software, such as Micr osoft Office software. Schools (units) of computer, information system security products for domestic products, incl udi ng the use of 360 and kingsoft Internet security software. XX education metropolitan area network used by the server for HP, firewall and information security product for Huaweiand Cisco products. In their daily work, to publicize related knowledge and information security considerations. Enhanced global awareness of network and information security, and strive to achieve network everyone knows security and virus before the guard, to improve network and information security, ensure that the XX education system network and i nformation system security. Tracking reporting system requires all parties to strengthen collaboration, work closely with emergency safety plan developed XX education metropolitan area network, regularly carry out emergency drills, and carried out special funds every year to protect the security of information. Annual 2-3 professional training for network managers in the cit y, forming technology with a strong professional and technical team, school network managers on common network failures and be ca pable of solving security issues. Issues that cannot be resolve d, timely forms of meetings, such as meetings, analysis, and solutions through a meeting, without rolling up the ability to solve problems, and feedba ck to superiors in writing departments to resolve. Through self-examination, we are well aware, relative lack of investment in education, facilities and equi pment for further updates, education development is still uneven, new education concepts need to be further enhanced to some extent and restricting the development of city education. We will take the opportunity of government supervision, to strive for the province education demonstration counties as a driving force, further increase input in education, efforts to promote thelong wing, and Li Wanfu, and Michael Jenkins, and Che n Jian, and Song and xiaochuanyun, 7 bit comrade participate in province backbone face-to-face or network learning, do each tea chi ng points are has teachers participate in training, October 17, 2013, issued XX city education information and equipment Center on requirements the teachi ng points schoolfor good satellite ground station installation prepared of notification, requirements school related management personnel familiar XX pr ovince teaching poi nts digital education resources full cover proje ct constructi on management manual, Particularly with regard to installation preparation parts according to the point of XX province full coverage of digital educational resources in the project construction management manual . Devices are able to receive TV signals and IP data, the schools have school training and school-based application to use good. Actively organize implementation of a division of a class, a teacher in one class activity. XX in XX city first to complete full registration of teachers working in this city, XX, S un class rate of 54 per cent respectively, the forefront. In XX, a division of a class, a class a total ranked first in Division activities, was awarded the national ministerial one, 2 pr ovincial second prize, third prize at the provincial level 3. Actively organize implementation of the e-learning space the work of everyone. At present, in the open spa ce of public service platform of provincial educational resources teachers number 2444, 83 to the total number of teachers, student number is 6569 of the open space, the citys total stude nts 18.31 to (junior hig h school students in 30 above, students not require d), registration number to meet the requirements of teachers and students, in XX in first place. Five, information technol ogy application capability as a means to boost teaching of teachers to use information, Education Bureau of XX title and modern educational technol ogy teacher assessment levels linked to the examination; launched a provinci al model school of modern education technology selecti on, a dvanced unit in education a year (individual) award. o expedite education informatization work, the city established the school running level of supervision and assessment system. Information education in school performance evaluation, e ducation assessment information work more than to cut weight 10. Practice is a regular room supervision, e ducation information steering, steering, steering with the end, principals of education i nformation into performance assessment and school level monitoring and evaluation, to develop a scientific, operational education information steering assessment methods, tracking management of education information and applications. By March 2016, 100 of the teachers, I participate d in a national educational technology training for primary and secondary school teachers, the teachers have made to cut 80 primary and middle school teachers educational technology proficiency test certificate. At present , all schools have acce ss to broadband networks. Training classification training of teachers, school teachers, academic leaders, information technology, teacher training and net work management personnel from the County, within the school back to school training once training is complete. Through this mode of classification training, i nformation technol ogy application capability training of teachers in our city reached 100. XX series of effective information 全国计算机等级考试二级公共基础最新题库( 一) 第一章数据结构与算法一. 选择题1. 算法的时间复杂度是指( c ) A.执行算法程序所需要的时间 B.算法程序的长度C.算法执行过程中所需要的基本运算次数 D. 算法程序中的指令条数2. 算法的空间复杂度是指( d ) A.算法程序的长度 B.算法程序中的指令条数C.算法程序所占的存储空间 D.算法执行过程中所需要的存储空间3. 下列叙述中正确的是( a ) A.线性表是线性结构 B.栈与队列是非线性结构C.线性链表是非线性结构 D.二叉树是线性结构4. 数据的存储结构是指( b ) A.数据所占的存储空间量 B.数据的逻辑结构在计算机中的表示C.数据在计算机中的顺序存储方式 D.存储在外存中的数据5. 下列关于队列的叙述中正确的是( c ) A.在队列中只能插入数据 B.在队列中只能删除数据C.队列是先进先出的线性表 D.队列是先进后出的线性表6. 下列关于栈的叙述中正确的是( d ) A.在栈中只能插入数据 B.在栈中只能删除数据C.栈是先进先出的线性表 D.栈是先进后出的线性表7. 设有下列二叉树: 对此二叉树中序遍历的结果为( b ) A. ABCDEF B.DBEAFC C.ABDECF D. DEBFCA 8. 在深度为5 的满二叉树中, 叶子结点的个数为( b ) A. 32 B. 31 C. 16 D. 15 9. 对长度为N的线性表进行顺序查找, 在最坏情况下所需要的比较次数为( b ) A. N+1 B. N C .(N+1)/2 D. N/2 10. 设树 T的度为 4, 其中度为1,2,3,4的结点个数分别为4,2,1,1 .则 T的叶子结点数为 a A. 8 B. 7 C . 6 D. 5 二. 填空题1.