arrays

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java

Which of the following lines will compile without errors?

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Is it possible to dynamically modify the size of an array?

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Select correct variable declarations.

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What is the result of the following code execution? import java.util.Arrays; class Generic<T extends Number> { private T arr[] = {1, 2, 3, 4, 5}; public String toString(){ return Arrays.toString(arr); } } public class Test { public static void main(String [] args) { Generic<Double> obj = new Generic<Double>(); System.out.println(obj); } }

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int[] x = new int[25] Which of statements below are true?

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Given a two-dimensional array (matrix) int[][] arr = {{1,2,3}, {0,0,0}, {3,2,1}}; Which of the answer choices allow to iterate over all the elements of an array and display them on the screen by means of for-each statement?

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What is the result of the following code execution? public class Test { public static void main(String[] args){ int[][] x = new int[2][5]; int[][] y = new int[2][5]; System.out.println(x[1][3]); System.arraycopy(x, 0, y, 0, x.length); x[1][3] = 55; System.out.println(y[1][3]); } }

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What happens when System.arraycopy() is called with the same array being the src and dist parameter?

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Should all the elements in Java arrays be of the same type?

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What will be printed out to console after the following class is compiled and executed: public class A { public static void main(String[] args) { List<Integer> list = new ArrayList<Integer>(); list.add(1); list.add(0); Integer[] array = null; list.toArray(array); System.out.println(list.get(1)); } }