北京亿号通东方信息技术有限公司

选择题 1:Which of the following answer is correct to express the value 8 in octal number? A.010 B.0x10 C.08 D.0x8 2: 1. 1.publicclassX 2. 2.publicobjectm() 3. 3.objecto=newfloat(3.14F); 4. 4.objectoa=newobject1; 5. 5.oa0=o; 6. 6.o=null; 7. 7.oa0=null; 8. 8.returno; 9. 9. 10. 10. 11. Whenisthefloatobjectcreatedinline3,eligibleforgarbagecollection? 1. public class X 2. public object m () 3. object o = new float (3.14F); 4. object oa = new object 1; 5. oa0= o; 6. o = null; 7. oa0 = null; 8.return o; 9. 10. When is the float object created in line 3, eligible for garbage collection? A.Just after line 5 B.Just after line 6 C.Just after line 7 D.Just after line 8(that is, as the method returns) 3: 1. Whatwillbetheresultofexecutingthefollowingcode? 2. 3. publicstaticvoidmain(Stringargs) 4. 5. chardigit=a; 6. for(inti=0;i10;i+) 7. 8. switch(digit) 9. 10. casex: 11. 12. intj=0; 13. System.out.println(j); 14. 15. default: 16. 17. intj=100; 18. System.out.println(j); 19. 20. 21. 22. inti=j; 23. System.out.println(i); 24. 25. 26. Choices:What will be the result of executing the following code? public static void main(String args) char digit = a; for (int i = 0; i 4) 3. System.out.println(“Test1”); 4. elseif(x9) 5. System.out.println(“Test2”); 6. else 7. System.out.println(“Test3”); 8. Whichrangeofvaluexwouldproduceofoutput“Test2”?Give the code fragment:if(x4)System.out.println(“Test 1”);else if (x9)System.out.println(“Test 2”);else System.out.println(“Test 3”);Which range of value x would produce of output “Test 2”? A.x4 C.x9 D.None 13:A class design requires that a member variable should be accessible only by same package, which modifer word should be used? A.protected B.public C.no modifer D.private 14:Use the operator “” and “”. Which statement is true? A.1010 0000 0000 0000 0000 0000 0000 0000 4 give 0000 1010 0000 0000 0000 0000 0000 0000 B.1010 0000 0000 0000 0000 0000 0000 0000 4 give 1111 1010 0000 0000 0000 0000 0000 0000 C.1010 0000 0000 0000 0000 0000 0000 0000 4 give 0000 0000 0000 0000 0000 0000 0000 0000 D.1010 0000 0000 0000 0000 0000 0000 0000 4 give 1111 1010 0000 0000 0000 0000 0000 0000 15:Which of the following statements are not legal? A.long l = 4990; B.int i = 4L; C.double d = 34.4; D.double t = 0.9F. 简答题 16:比较两个字符串，用O(n)时间和恒量空间。 17:写一个方法(函数)：判断一个单链表中是是否有环？ 18:servlet的生命周期? 19:MVC的各个部分都有那些技术来实现?如何实现? 20:servlet的init()方法和service()方法的区别? 21:int 和 Integer 有什么区别？ 22:数组aN，存放了1至N-1个数，其中某个数重复一次。写一个函数，找出被重复的数字.时间复杂度必须为o（N）函数原型：int do_dup(int a,int N) 23: 1. 找出以下程序错误。 2. ClassTest 3. privateStringpar1; 4. privateStringpar2; 5. Test() 6. 7. 8. publicstaticvoidmain(Stringarg) 9. inta; 10. if(a) 11. System.out.println(par1=+par1); 12. else 13. System.out.println(par2=+par2); 14. 15. 16. 找出以下程序错误。Class Test private String par1; private String par2; Test() public sta