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Which two create an instance of an array?() A、 int ia = new int [15];B、 float fa = new float [20];C、 char ca = “Some String”;D、 Object oa = new float[20];E、 Int ia = (4, 5, 6) (1, 2, 3)
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The 8859-1 character code for the uppercase letter A is 65. Which of these code fragments declare and initialize a variable of type char with this value?() A、char ch = 65;B、char ch = ’¥65’;C、char ch = ’¥0041’;D、char ch = ’A’;E、char ch = "A";
package sun.scjp; public enum Color { RED, GREEN, BLUE } package sun.beta; // insert code here public class Beta { Color g = GREEN; public static void main( String[] argv) { System.out.println( GREEN); } } The class Beta and the enum Color are in different packages. Which two code fragments, inserted individually at line 2 of the Beta declaration, will allow this code to compile?()A、 import sun.scjp.Color.*;B、 import static sun.scjp.Color.*;C、 import sun.scjp.Color; import static sun.scjp.Color.*;D、 import sun.scjp.*; import static sun.scjp.Color.*;E、 import sun.scjp.Color; import static sun.scjp.Color.GREEN;
Which three form part of correct array declarations?() A、 public int a []B、 static int [] aC、 public [] int aD、 private int a [3]E、 private int [3] a []F、 public final int [] a
Which code fragments will succeed in printing the last argument given on the command line to the standard output, and exit gracefully with no output if no arguments are given?() CODE FRAGMENT a: public static void main(String args[]) { if (args.length != 0) System.out.println(args[args.length-1]); } CODE FRAGMENT b: public static void main(String args[]) { try { System.out.println(args[args.length]); } catch (ArrayIndexOutOfBoundsException e) {} } CODE FRAGMENT c: public static void main(String args[]) { int ix = args.length; String last = args[ix]; if (ix != 0) System.out.println(last); } CODE FRAGMENT d: public static void main(String args[]) { int ix = args.length-1; if (ix > 0) System.out.println(args[ix]); } CODE FRAGMENT e: public static void main(String args[]) { try { System.out.println(args[args.length-1]); }catch (NullPointerException e) {} } A、Code fragment a.B、Code fragment b.C、Code fragment c.D、Code fragment d.E、Code fragment e.
Which code fragments will succeed in initializing a two-dimensional array named tab with a size that will cause the expression tab[3][2] to access a valid element?() CODE FRAGMENT a: int[][] tab = { { 0, 0, 0 }, { 0, 0, 0 } }; CODE FRAGMENT b: int tab[][] = new int[4][]; for (int i=0; i CODE FRAGMENT c: int tab[][] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; CODE FRAGMENT d: int tab[3][2]; CODE FRAGMENT e: int[] tab[] = { {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0} }; A、Code fragment a.B、Code fragment b.C、Code fragment c.D、Code fragment d.E、Code fragment e.
Which two code fragments are most likely to cause a StackOverflowError?()A、int []x = {1,2,3,4,5};for(int y = 0; y < 6; y++) System.out.println(x[y]);B、static int[] x = {7,6,5,4};static { x[1] = 8;x[4] = 3; }C、for(int y = 10; y < 10; y++)doStuff(y);D、void doOne(int x) { doTwo(x); }void doTwo(int y) { doThree(y); }void doThree(int z) { doTwo(z); }E、for(int x = 0; x < 1000000000; x++) doStuff(x);F、void counter(int i) { counter(++i); }