笔试题.doc

.net笔试题姓名:日期::(1)面向对象语言含有____封装____性、_____继承____性、____多态____性。(2)能用foreach遍历访问对象需要实现_______IEnumerable_________接口或申明_______GetEnumerable_________方法类型。(3)mand________、______Connection_______、_______DataAdapter________、_______DataSet________、_______DataReader__________。:(1)以下叙述正确是:。。。。(2)从数据库读取统计,你可能用到方法有:、protected、public、internal修饰符访问权限。答:public不受限制访问 Private只能在本类中访问 Protected本类和继承和她类中全部能访问 :取出表A中第31到第40统计(SQLServer,以自动增加ID作为主键,注意:ID可能不是连续。)答:selecttop10fromawhereidnotin(selecttop30froma)或:selecttop10fromawhereid>(selectmax(id)from(selecttop30froma)asb)。答:session(viewstate) 简单,但易丢失application 全局cookie 简单,但可能不支持,可能被伪造inputtype="hidden" 简单,可能被伪造url参数简单,显示于地址栏,长度有限数据库稳定,安全,{privatestringstr="";privateinti=0;staticvoidStringConvert(stringstr){str="stringbeingconverted.";}staticvoidStringConvert(Class1c){="stringbeingconverted.";}staticvoidAdd(inti){i++;}staticvoidAddWithRef(refinti){i++;}staticvoidMain(){inti1=10;inti2=20;stringstr="str";Class1c=newClass1();Add(i1);AddWithRef(refi2);Add();StringConvert(str);StringConvert(c);(i1);(i2);();(str);();}}答:10,21,0,str,{publicA(){('A');}publicvirtualvoidFun(){("()");}}lassB:A{publicB(){('B');}ewvoidFun(){("()");}publicstaticvoidMain(){Aa=newB();();}}答:A,B,():lassA{publicvirtualvoidFun1(inti){(i);}publicvoidFun2(Aa){(1);Fun1(5);}}lassB:A{publicoverridevoidFun1(inti){(i+1);}publicstaticvoidMain(){Bb=newB();Aa=newA();(b);(a);}}答:2,5,1,:1、1、2、3、5、8、13、21、34......求第30位数是多少,用递归算法实现。(C#语言)答:privateintAdd(inti){if(i<=0){return0;}else