Java考试资料(考试试卷一).doc

装订线内不要答题，装订线外不要写姓名、学号、学院专业年级班签个人信息，违者试卷作0分处理考 点 号教 室 号姓 名学 院专 业年 级班 号学号（全号）湖南农业大学课程考核试卷课程名称（全称）：Java程序设计（双语） 课程代码：20638B0考核时间：2011 年01月 04 日 试卷号： A 考核对象：电子商务081、电子商务082大题号一二三四五六七八九十总分题分202020101020得分 得分I、Choose one correct answer（Total 20 points，each question 2 points）1. Given the following code:switch (m) case 0: System.out.println(Condition 0); case 1: System.out.println(Condition 1); case 2: System.out.println(Condition 2); case 3: System.out.println(Condition 3);break; default: System.out.println(Other Condition);Which values of m will cause Condition 2 is output? ( ) A. 0,1 and 2 B. only 1 C. only 2 D. only 02. Choose the valid identifier from those listed below. ( ) A. MyMethod B. 3byte C. 5_const D.true3. Which method is faster for linear search and binary search? ( )A. linear search B. binary search C. equal D. different in various situations4. There are three main attributes of class类 except ( )A. encapsulation B.inheritance 继承性C. abstraction D.polymorphism 多态性5. Which language is a low-level programming language in which a mnemonic is used to represent each of the machine language instructions ? ( )A. The machine languageB. Assembly languageC. The ada languageD. The high-level language6. Which is right ? ( )A.String temp = new String j a z; B.char temp = j b c; C.String temp = a, b, c; D.String temp = a, b, c;7( ) contains pre defined classes and interfaces for developing Java programs: A. API B. OOP C. DOM D. COM8. ( ) are errors that occur during compilation 编写 .A. logic errors ; B. runtime errors; C. syntax errors; D. other errors;9.The result of 2 + 5 * 3 7 * ( 2 + 4) - 1 is? ( )A.null B.true C.false D.others10. The result of ( 6 4 ) ( 8 0) is? ( )A.null B.true C.false D.others得分II、Decide correct or wrong（Total 20 points，each question 2 points， “”means right, “X” means wrong）1、the precedence优先权 of ! is lower than *.（错）2、Evaluate whatever subexpressions you can possibly evaluate from right to left.(错)3、Runtime errors occur when a program does not perform the way it was intended to.(错 )4、the else clause matches the most recent unmatched if clause in the same block.（对）5、The symbols ? and : appear together in a conditional expression, they form a conditional operator.This operator is called a ternary operator.（对）6、It will cause a logic error if you use floating-point values for equality checking in a loop control.（对）7、Adding a semicolon分号 at the end of the for clause从句 before the loop body is a common compiling mistake.( 对)8、The high-level language are English-like and easy to learn and program.（ 对） 9、Java is not sensative to Lowercase and Upcase. （ 错） 10、Java is distributed and interpreted.（对）得分III、Fill the following blanks（Total 20 points，each blank 2 points）1import javax.swing.JOptionPane;public class TestSum public static void main(String args) / Initialize sum sum=0; / Add 1, 2, ., 99999, 100000 to sum for (Long ; ; ) ; / Display result JOptionPane.showMessageDialog(null, The sum is + sum); 2public class TestMethodOverloading public static void main(String args) System.out.println(The maximum between 3 and 4 is + max(3, 4); System.out.println(The maximum between 3.0 and 5.4 is + max(3.0, 5.4); System.out.println(The maximum between 3.0, 5.4, and 10.14 is + max(3.0, 5.4, 10.14); /* Return the max between two int values */ public static (int num1, int num2) if (num1 num2) return num1; else return num2; /* Find the max between two double values */ public static max( num1, double num2) if (num1 num2) return num1; else return num2; /* Return the max among three double values */ public static double max(double num1, double num2, double num3) return ; 得分IV、Write the results after code is executed.（Total 10 points，each question 5 points）1import java.io.*;public class abc public static void main(String args) SubClass s = new SubClass( ); System.out.println(s.max( );class SuperClassint a = 35 , b = 18 ; class SubClass extends SuperClass int max( ) return (ab)?a:b);The result of question 1 is : 2import javax.swing.JOptionPane;public class ComputeFactorial public static void main(String args) int n = 4; JOptionPane.showMessageDialog(null, Factorial of + n + is + factorial(n); static long factorial(int n) if (n = 0) return 1; else return n * factorial(n - 1); The result of question 2 is : 得分V、answer questions briefly（Total 10 points，each question 5 points）1. Briefly the principle of class inheritance.2. Answer the common methods for debugging.得分VI、programming（Total 10 points，each question 10 points）1Please write a Java program,compute th