1. | 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") |
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Hint
Half-n-half Clue
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2. | Suppose that s1 and s2 are two strings. Which of the statements or expressions are valid? (A) String s3 = s1 + s2; (B) String s3 = s1 - s2; (C) s1 <= s2 (D) s1.compareTo(s2); (E) int m = s1.length(); |
| Half-n-half Clue
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3. | Which of the following contain error? (A) int x[] = int[10]; (B) int[] y = new int[5]; (C) float d[] = |
| Half-n-half Clue
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4. | Which of the following are the wrapper classes? (A) Random (B) Byte (C) Vector (D) Integer (E) Short (F) Double (G) String |
| Half-n-half Clue
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5. | 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; |
| Half-n-half Clue
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6. | Which of the following statements are valid array declaration? (A) int number(); (B) float average[]; (C) double[] marks; (D) counter int[]; |
| Half-n-half Clue
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7. | 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 |
| Half-n-half Clue
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