Unicode defines two mapping methods: the Unicode Transformation Format (UTF) encodings, and the Universal Coded Character Set (UCS) encodings. An encoding maps (possibly a subset of) the range of Unicode code points to sequences of values in some fixed-size range, termed code values. The numbers in the names of the encodings indicate the number of bits per code value (for UTF encodings) or the number of bytes per code value (for UCS encodings). UTF-8 and UTF-16 are probably the most commonly used encodings. UCS-2 is an obsolete subset of UTF-16; UCS-4 and UTF-32 are functionally equivalent. COUNT 5
QSN1 How many mapping methods does Unicode define? ANS1 two QSN2 What are the two mapping methods that Unicode defines? ANS2 Unicode Transformation Format (UTF) encodings, and the Universal Coded Character Set (UCS) encodings QSN3 What do numbers in the names of the encodings indicate?  ANS3 the number of bits per code value (for UTF encodings) or the number of bytes per code value QSN4 What are the most commonly used encodings?  ANS4 UTF-8 and UTF-16 QSN5 What does UCS stand for? ANS5 Universal Coded Character Set