Page 67 - Cs_withBlue_J_C11_Flipbook
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• The Unicode supports all Internet standards like HTML, XML, Java, JavaScript, and Perl.
• The Unicode standards ensure interoperability and portability by prescribing conformant behaviour.
Disadvantage of Unicode is given below:
• UTF-16 and UTF-32 require more memory space.
Let’s Revisit
♦ Character encoding is a process of assigning numeric code to character sets of different human languages across the world.
♦ In signed magnitude notation, the rightmost sign bit is assigned 0 for positive and 1 for negative binary numbers.
♦ One’s complement representation of a binary negative number is obtained by changing 0 bit to 1 and 1 bit to 0.
♦ Two’s complement representation of a binary negative number is obtained by adding 1 to its One’s complement form.
♦ Signed and unsigned shift operators include signed left shift <<, signed right shift >> and unsigned right shift >>>.
♦ Bitwise logical operators include complement ∧ , AND (&) , OR (|) and XOR (∧).
♦ A signed real number in fixed point notation has three parts: sign bit, integral part and fractional part.
♦ Floating point representation consists of two parts namely mantissa and exponent.
♦ BCD is the oldest coding system where each decimal digit is expressed as a group of 4 bits or nibbles.
♦ ASCII 7 could represent all digits from 0 to 9, uppercase and lowercase English alphabets and some special characters.
♦ The ISCII character code covers all recognised Indian languages other than the languages supported by ASCII code.
♦ The Unicode is an International character encoding standard that includes different languages, scripts and symbols.
MIND DRILL
Solved Questions
A. Tick ( ) the correct option:
1. 1 Gigabyte is equivalent to ………………… .
a. 1024 kilobyte b. 1024 megabyte
c. 1024 terabyte d. 1024 petabyte
2. Signed and unsigned binary integers can be represented using ………………… methods.
a. 1 b. 2
c. 3 d. 4
3. The signed magnitude representation of a binary number represented by 8 bits is 10000101. Which of the following is its decimal
equivalent?
a. -5 b. +5
c. -133 d. +133
4. Which of the following is one’s complement representation of -8 in 4-bit notation?
a. 1000 b. 1111
c. -1000 d. 0111
5. Which of the following is two’s complement representation of -14 in 4-bit notation?
a. -1110 b. 0001
c. 0010 d. 0011
6. Bitwise AND operator results in ………………… if both bits are false.
a. 0 b. 1
c. Both a and b d. None of these
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