東華軟件筆試題

1、 北京東華合創(chuàng)數(shù)碼科技股份筆試試卷Java 語言部分： 聯(lián)系方式： 1. which wont cause a compiler warning or error？(多項(xiàng)選擇)a) float f = 1.3;b) char c = a;c) byte b = 257;d) boolean b = null;e) int i = 10;2. 請選擇下面這段代碼的輸出結(jié)果?int i = 0;switch (i) case 0:System.out.println("zero");case 1:System.out.println("one");case

2、2:System.out.println("two");break;case 3: System.out.println("three");1) zero2) zero,one3) zero,one,two4) zero,one,two,three3. public class Test private static int j=0; public static boolean methodB(int k) j+=k; return true; public static void methodA(int i) boolean b; b=i>10&

3、amp;methodB(1); b=i>10&&methodB(2); public static void main(String args) methodA(0); 17) what is the value of j at line 17? 10 21 32434. If we execute the code below with “java Test Red Green Blue”, what is the result? public class Test public static void main(String args) String foo=args

4、1; String bar=args2; String baz=args3; what is the value of baz? A. baz has value of "" B. baz has value of null C. baz has value of "Red" D. baz has value of "Blue" E. baz has value of "Green" F. the code does not compile G. the program throw an exception5. 請

5、選擇下面這段代碼的輸出結(jié)果?1)public class Test 2)public static void main(String args) 3) class Foo 4) public int i=3; 5) 6)Object o=(Object)new Foo(); 7) Foo foo=(Foo)o; 8)System.out.println(foo.i); 9) 10) A pile error at line 6 B pile error at line 7 C pile error at line 8 D.print out 36. int index=1; String te

6、st=new String3; String foo=testindex; what is the result of foo? A. "" B.null C.throw a Exception D.not compile7. 下面的五個(gè)選擇中哪兩個(gè)描述是正確的？多項(xiàng)選擇 A. static inner class requires a static initializer B. A static inner class requires an instance of the enclosing class C. A static inner class has no re

7、ference to an instance of the enclosing class D. A static inner class has accesss to the non-static member of the other class E. static members of a static inner class can be referenced using the class name of the static inner class8. 請選擇下面這段代碼的輸出結(jié)果? class A public int getNumber(int a) return a+1; c

8、lass B extends A public int getNumber(int a, char c) return a+2; public static void main(String args) B b=new B(); System.out.println(b.getNumber(0); A. compilation succeeds and 1 is printed B. compilation succeeds and 2 is printed C. An error at line 8 cause compilation to fail D. An error at line

9、14 cause compilation to fail9. class ExceptionTest public static void main(String args) try methodA(); catch(IOException e) System.out.println("caught IOException"); catch(Exception e) System.out.println("caught Exception"); If methodA() throws a IOException, what is the result?I

10、f we change the sequence of catch,whats the result？10. 請寫出下面這段代碼的輸出結(jié)果?public class Test public static void main(String args) StringBuffer a=new StringBuffer("A"); StringBuffer b=new StringBuffer("B"); operate(a,b); System.out.pintln(a+","+b); public static void operate(

11、StringBuffer x, StringBuffer y) x.append(y); y=x; 11. 請寫出下面這段代碼的輸出結(jié)果?class Shape Shape(int i) System.out.println("This is Shape" + i); public class Circle extends Shape static Shape s1 = new Shape(1); Shape s2 = new Shape(3); Circle(int i) super(i); System.out.println("This is Circle" + i); public static v