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Java Programming - Language Fundamentals - Discussion

Discussion Forum : Language Fundamentals - General Questions (Q.No. 1)
Language Fundamentals
1.
Which four options describe the correct default values for array elements of the types indicated?
  1. int -> 0
  2. String -> "null"
  3. Dog -> null
  4. char -> '\u0000'
  5. float -> 0.0f
  6. boolean -> true
1, 2, 3, 4
1, 3, 4, 5
2, 4, 5, 6
3, 4, 5, 6
Answer: Option
Explanation:

(1), (3), (4), (5) are the correct statements.

(2) is wrong because the default value for a String (and any other object reference) is null, with no quotes.

(6) is wrong because the default value for boolean elements is false.

Discussion:
64 comments Page 7 of 7.
Manju said:   1 decade ago
What are default value of char in C++?

What is \u0000? What does \u indicate?

Please explain.
Hema said:   1 decade ago
Please can anyone explain hexadecimal representation?
Thiru said:   1 decade ago
char in Java is an unsigned 16 bit numerical value representing a two-byte Unicode character.

Since you left it as default, your char is 0, or u\0000. This is the Unicode NULL value.
Boopalan v said:   2 decades ago
Is there any primitive data type named Dog?
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