which three are valid declarations of a char 1 char c1..., Basics, Java

Question:Which three are valid declarations of a char? 
1.	char c1 = 064770;
2.	char c2 = 'face';
3.	char c3 = 0xbeef;
4.	char c4 = \u0022;
5.	char c5 = '\iface';
6.	char c6 = '\uface';

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

/31

+ AnswerB

+ 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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Question:Which three are valid declarations of a char? 1. char c1 = 064770; 2. char c2 = 'face'; 3. char c3 = 0xbeef; 4. char c4 = \u0022; 5. char c5 = '\iface'; 6. char c6 = '\uface';

A 1, 2, 4

B 1, 3, 6

C 3, 5

D 5 only

B