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QWhich three are valid declarations of a char?

char c1 = 064770;

char c2 = 'face';

char c3 = 0xbeef;

char c4 = \u0022;

char c5 = '\iface';

char c6 = '\uface';

ID: #1988 Java Language Fundamental 2,474 views

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A 1, 2, 4 ✔ ✖
B 1, 3, 6 ✔ ✖
C 3, 5 ✔ ✖
D 5 only ✔ ✖

Correct Answer: Option B

Explanation

(1), (3), and (6) are correct. char c1 = 064770; is an octal representation of the integer value 27128, which is legal because it fits into an unsigned 16-bit integer. char c3 = 0xbeef; is a hexadecimal representation of the integer value 48879, which fits into an unsigned 16-bit integer. char c6 = '\uface'; is a Unicode representation of a character.

char c2 = 'face'; is wrong because you can't put more than one character in a char literal. The only other acceptable char literal that can go between single quotes is a Unicode value, and Unicode literals must always start with a '\u'.

char c4 = \u0022; is wrong because the single quotes are missing.

char c5 = '\iface'; is wrong because it appears to be a Unicode representation (notice the backslash), but starts with '\i' rather than '\u'.

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QWhich three are valid declarations of a char? char c1 = 064770; char c2 = 'face'; char c3 = 0xbeef; char c4 = \u0022; char c5 = '\iface'; char c6 = '\uface';

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Related MCQ Questions

QWhich three are valid declarations of a char?

char c1 = 064770;

char c2 = 'face';

char c3 = 0xbeef;

char c4 = \u0022;

char c5 = '\iface';

char c6 = '\uface';