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A character in ASCII format requires only one byte and a character in UNICODE requires 2 bytes.
An ASCII character requires one byte of storage. A Unicode character requires between one and four bytes of storage, depending on the encoding format used.
In ASCII, EBCDIC, FIELDATA, etc. yes. However Unicode characters are composed of multiple bytes.
The number of bytes used by a character varies from language to language. Java uses a 16-bit (two-byte) character so that it can represent many non-Latin characters in the Unicode character set.
1 byte (Unicode)
Depends on what you refer to as Unicode. Typically the ones you will see is UTF-8 which uses from up to one to three bytes per character (the two or three-byte characters are usually for characters used in various other languages that are not already covered under the ASCII codepage). Otherwise, the convention states that Unicode is UTF-16.
only uses one byte (8 bits) to encode English characters uses two bytes (16 bits) to encode the most commonly used characters. uses four bytes (32 bits) to encode the characters.
A wyde is a unit of two-byte unsigned data, mostly used for a Unicode character.
1 MB (megabyte) equals 1048576 bytes. In most operating systems that are 32-bit, 1 ASCII character takes up 1 byte (8 bits). However, recently, the unicode system of character representation has upped the number of bytes required to represent alphabets of all popular languages in the world.
That depends what encoding is used. One common (fairly old) encoding is ASCII; that one uses one byte for each character (letter, symbol, space, etc.). Some systems use 2 bytes per character. Many modern systems use Unicode; if the Unicode characters are stored as UTF-16 - a fairly common encoding scheme - many common characters will still use a single byte, while many special symbols (for example, accented characters) will take up two bytes. The number of bits is simply the number of bytes multiplied by 8.
Different languages use different size types for different reasons. In this case, the difference is between ASCII and Unicode. Java characters use 2-bytes to store a Unicode character so as to allow a wider variety of characters in strings, whereas C, at least by default, only uses 1 byte to store a character.
Long long time ago a character was only one byte. Now (unicode) a character is 2 or 4 bytes, but usually we use a variable-length encoding called utf-8.