Multiple choice technology programming languages

String s=new String("Bicycle"); int iBegin=1; char iEnd=3; System.out.println(s.substring(iBegin,iEnd));

  1. Bic

  2. ic

  3. icy

  4. error: no method matching substring(int,char)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The substring method in Java is substring(int beginIndex, int endIndex). With beginIndex=1 and endIndex=3, it extracts characters from index 1 (inclusive) to index 3 (exclusive). From 'Bicycle', this gives 'ic' (characters at positions 1 and 2).

AI explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) Bic This option is incorrect because the substring method in Java uses a zero-based index. In this case, iBegin is 1 and iEnd is 3. The substring method will return a substring starting from the index specified by iBegin (inclusive) and ending at the index specified by iEnd (exclusive). Therefore, the resulting substring will include the characters at index 1 and 2, which are 'i' and 'c', respectively.

Option B) ic This option is correct because the substring method will return a substring starting from the index specified by iBegin (inclusive) and ending at the index specified by iEnd (exclusive). In this case, iBegin is 1 and iEnd is 3. Therefore, the resulting substring will include the characters at index 1 and 2, which are 'i' and 'c', respectively.

Option C) icy This option is incorrect because the substring method will return a substring starting from the index specified by iBegin (inclusive) and ending at the index specified by iEnd (exclusive). In this case, iBegin is 1 and iEnd is 3. Therefore, the resulting substring will include the characters at index 1 and 2, which are 'i' and 'c', respectively. It will not include the character at index 3, which is 'y'.

Option D) error: no method matching substring(int,char) This option is incorrect because the substring method in Java accepts two integer parameters as arguments - the starting index and the ending index. It does not accept a character as the second argument. Therefore, the code will not compile and will result in a compilation error.

The correct answer is B) ic. This option is correct because the substring method will return a substring starting from the index specified by iBegin (inclusive) and ending at the index specified by iEnd (exclusive), which in this case includes the characters 'i' and 'c'.

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