笔试题.doc

:   (1)面向对象的语言具有________性、_________性、________性。   (2)能用foreach遍历访问的对象需要实现________________接口或声明________________方法的类型。   (3)中的五个主要对象_______________、_____________、_______________、_______________、_________________。:   (1)以下叙述正确的是:     。    。      。      。(2)从数据库读取记录,你可能用到的方法有:                                                  、protected、public、internal修饰符的访问权限。:取出表A中第31到第40记录(SQLServer,以自动增长的ID作为主键, 注意:ID可能不是连续的。)。 {      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);          ();      }    } {       publicA()       {           ('A');       }       publicvirtualvoidFun()       {           ("()");       }}lassB:A {       publicB()      {           ('B');       }       ewvoidFun()        {            ("()");        }       publicstaticvoidMain()        {           Aa=newB();           ();        }}8.     写出程序的输出结果:lassA {       publicvirtualvoidFun1(inti)      {           (i);       }  publicvoidFun2(Aa)        {           (1);           Fun1(5);       }}lassB:A {       publicoverridevoidFun1(inti)