1. 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;   1 0 0 1 1 0 1 1 1   0 0 1 0 1 0 1 0 0   1 0 0 0 1 0 0 0 1   0 0 0 0 0 0 0 0 0   Hint Half-n-half Clue   2. When we implement the Runnable interface, we must define the method   run()   main()   start()   init()   resume()   Half-n-half Clue   3. Which of the following classes are available in the java.lang package? (A) Stack (B) Object (C) Math (D) Random (E) String (F) StringBuffer (G) Vector   (B), (C) & (E)   (B), (C), (E) & (F)   (B), (E) & (F)   (A), (B), (C), (E) & (F)   (C), (E) & (F)   Half-n-half Clue   4. Consider the following code int number[] = new int[5]; After execution of this statement, which of the following are true? (A) number[0] is undefined (B) number[5] is undefined (C) number[4] is null (D) number[2] is 0 (E) number.length() is 5   (E)   (A) & (E)   (B), (D) & (E)   (C) & (E)   Half-n-half Clue   5. Given the code String s = new String("abc"); Which of the following calls are valid? (A) s.trim() (B) s.replace('a', 'A') (C) s.substring(3) (D) s.toUppercase() (E) s.setCharAt(1,'A') (F) s.append("xyz")   (C), (D) & (E)   (D) & (E)   (A), (B), (C) & (D)   (A), (C), (D) & (E)   (A), (B) & (C)   Half-n-half Clue   6. Which of the following methods belong to the String class?   length()   All of these   equals()   compareTo()   None of these   substring()   Half-n-half Clue   7. Which of the following contain error? (A) int x[] = int[10]; (B) int[] y = new int[5]; (C) float d[] =   (A), (E) & (F)   (A), (D) & (E)   (A), (B), (D), (E) & (F)   (D), (E) & (F)   (A), (D) & (F)   Half-n-half Clue