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CS 180

Assignment 6 Arrays. CS 180 . Which is a legal array declaration or definition? int[] []x[]; int *x; int x[5]; int[] x = {1,2,3};. Which of the following statements puts a reference to the String "Hello" in the last slot of the array?. String[] names = new String[10] ;

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CS 180

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  1. Assignment 6 Arrays CS 180

  2. Which is a legal array declaration or definition? • int[] []x[]; • int *x; • int x[5]; • int[] x = {1,2,3};

  3. Which of the following statements puts a reference to the String "Hello" in the last slot of the array? String[] names = new String[10] ; A. names[0] = "Hello" ; B. names[10] = "Hello" ; C. names[9] = "Hello" ; D. String[names.length-1 ] = "Hello" ;

  4. What will be the content of array variable table after executing the following code? • for(int i = 0; i < 3; i++) for(int j = 0; j < 3; j++) if(j = i) • table[i][j] = 1; • else • table[i][j] = 0; A. 0 0 0 0 0 0 0 0 0 B. 1 0 0 0 1 0 0 0 1 C. This code will result in compiler error D. This code will result in Run Time Exception

  5. What will happen if you try to compile and run the following code? • public class Q { • public static void main(String argv[]){ • int anar[]=new int[5]; • System.out.println(anar[0]); • } • } A. Error: anar is referenced before it is initialized B. null C. 0 D. 5 E. 1

  6. Which of the following fragments prints out the slots of the array from last to first, skipping slots that contain null? A. for ( int j = 0; j < names.length; j++ ) if ( names[j] != null ) System.out.println( names[j] ); B. for ( int j = names.length; j < names.length; j++ ) if ( names[j] != null ) System.out.println( names[j] ); C. for ( int j = names.length-1; j >= 0; j-- ) if ( names[j] != null ) System.out.println( names[j] ); D. for ( int j = names.length; j >= 0; j++ ) if ( names[j] != null ) System.out.println( names[j] );

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