高级程序员考试题

1、高级程序员闭卷测试题一、选择（共20分，每题5分）1下列数组初始化语句哪些是正确的。ABA. int nums = new int0,1,2,3,4;B. int num_1 = new int0,1,new int0,1,2,new int0,1,2,3 ;C. int num_2 = 0,1,0,1,2,0,1,2,3;2选择正确答案填入括号。通过使用 base 关键字可以从派生类中访问基类成员（ ）。可以从静态方法中访问基类成员（ ）。AB 正确错误3下列数据对象类型中，哪些是从ICollection接口上派生的。在您认为正确的选项括号中打“”符号。ABEG A. List<T&g

2、t; ( ) B. ArrayList （ ） C. Buffer ( ) D. BitMap ( ) E. Queue ( ) F. SortedList ( ) G. Stack ( ) H. Convert ( ) I. Stream ( )4下列哪些是ICollection接口中的方法或属性。在您认为正确的选项括号中打“”符号。 A. Add ( ) B. CopyTo （ ） C. RemoveAt ( ) D. Count ( ) D. Insert ( ) E. GetEnumerator ( ) G. Clear ( )二、查看下面代码，划掉错误或无效代码，简单说明原因。将正确

3、的代码写在上方空白处。(共45分)第1题：5分using System;using System.Drawing;public class UserListBox : ListBoxpublic UserListBox() protected override void OnDrawItem(DrawItemEventArgs e) Rectangle rect = e.Bounds; using (Graphics gs = new Graphics() using (SolidBrush bs = new SolidBrush(Color.Blue) gs. FillEllipse (bs

4、, rect);第2题：5分using System;using System.Drawing;public class UserClasspublic UserClass ()public void DrawRectangle(Graphics gs, Rectangle rc)using (SolidBrush bs = new SolidBrush(Color.Blue) gs.DrawRectangle(bs, rc); 第3题：5分public struct Person public string Name; public string Nationality; public Pe

5、rson() Name = "张三" Nationality = "汉族" public Person(string name, string nationality) Name = name; Nationality = nationality; 第4题：30分using System;using System.Drawing;public class Class1private const int DEFAULT_WIDTH = 100;private const int DEFAULT_HEIGHT = 100;private const Poin

6、t m_locator = new Point(0, 0);private Size m_pictureSize = new Size(DEFAULT_WIDTH, DEFAULT_HEIGHT);public Class1() public Point Locator get return m_locator; public Size PictureSize get return m_pictureSize; set if (value != null) m_pictureSize = value;public class Class2 : Class1public Class2(int p

7、ictureWidth) this.PictureSize.Width = pictureWidth;public class Class3 : Class2public Class3(int ws) : base(CalcWidth(ws)public int CalcWidth(int ws) int width = 0;foreach (int w in ws) width += w;return width;三、请阅读下面的代码。 问按如下所示方式调用代码段void DrawRectangleWithString()，可否得到（图1）所示的输出结果？如果不能，请指出问题出在那里？（20

8、分）（图1）using System;using System.Windows.Forms;using System.Drawing;using System.Drawing.Drawing2D;using System.Runtime.Serialization;using System.Security.Permissions;namespace DrawShapes public partial class Form1 : Form public Form1() InitializeComponent(); private void Form1_Paint(object sender,

9、PaintEventArgs e) Rectangle newRect = new Rectangle(30, 30, 500, 20); float angle = 15; DrawRectangleWithString(e.Graphics, newRect, angle); public void DrawRectangleWithString(Graphics graphics, Rectangle rect, float angle) string str = "如果程序正确的话,本字符串将沿着下面画出的一个矩形长边长边排列" Matrix rotateMatri

10、cs = new Matrix(); Point centerPos = new Point(rect.Left, rect.Top); rotateMatrics.RotateAt(angle, centerPos); graphics.Transform = rotateMatrics; graphics.DrawString(str, new Font("宋体", 11), Brushes.Red, rect); GraphicsPath graphicsPath = new GraphicsPath(); graphicsPath.AddRectangle(rect

11、); graphicsPath.Transform(rotateMatrics); graphics.SmoothingMode = SmoothingMode.HighQuality; graphics.DrawPath(Pens.Blue, graphicsPath); graphicsPath.Dispose(); 五、下面的代码段中存在错误或无效代码， 请指出。（15分）static void HasRows(SqlConnection connection) using (connection) SqlCommand command = new SqlCommand( "SELECT CategoryID, CategoryName FROM Categories;", connection); connection.Open(); SqlDataReader reader = new SqlDataReader (); if (r