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阿里巴巴技术类笔试题

[10-10 21:23:13]   来源:http://www.77xue.com  笔试题目   阅读:8655
概要:(B) boolean b = (false && true);(C) float y = 22.3; (D) int x = (25 | 125)1. (A) & (C)2. (A)3. (A), (C) & (D)4. (A), (B) & (D)Question 53. (单选)Which lines of the following will produce an error?www.77xue.com哦 1. byte a1 = 2, a2 = 4, a3;2. short s = 16;3. a2 = s;4. a3 = a1 * a2;1. Line 3 and Line 42. Line 1 only3. Line 3 only4. Line 4 only5. Line 1 and Line 4Question 54. (单选)Which keyword can protect a class in a package from accessibility
阿里巴巴技术类笔试题,标签:驾照笔试题目,腾讯笔试题目,http://www.77xue.com

  (B) boolean b = (false && true);

  (C) float y = 22.3; (D) int x = (25 | 125)

  1. (A) & (C)

  2. (A)

  3. (A), (C) & (D)

  4. (A), (B) & (D)

  Question 53. (单选)

  Which lines of the following will produce an error?

www.77xue.com哦

  1. byte a1 = 2, a2 = 4, a3;

  2. short s = 16;

  3. a2 = s;

  4. a3 = a1 * a2;

  1. Line 3 and Line 4

  2. Line 1 only

  3. Line 3 only

  4. Line 4 only

  5. Line 1 and Line 4

  Question 54. (单选)

  Which keyword can protect a class in a package from accessibility by the classes outside the package?

  1. don’t use any keyword at all (make it default)

  2. private

  3. protected

  4. final

  Question 55. (单选)

  Which of the following statements are valid array declaration?

  (A) int number();

  (B) float average[];

  (C) double[] marks;

  (D) counter int[];

  1. (B) & (C)

  2. (A)

  3. (A) & (C)

  4. (D)

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