In the hexadecimal system, the symbol D stands for which decimal value?
- A.11
- B.12
- C.13
- D.14
Correct answer
Explanation
The correct answer is C, 13. Hexadecimal has base 16 and therefore needs sixteen different symbols. The digits 0 to 9 serve for the first ten values, and because no single digit exists for the values 10 to 15, the letters A to F are borrowed. The mapping runs A for 10, B for 11, C for 12, D for 13, E for 14 and F for 15. The letter D is the fourth of these letters, so it stands for 13, whose binary form is 1101. Option A is wrong because 11 is B. Option B is wrong because 12 is C. Option D is wrong because 14 is E. A simple memory aid is that the letters continue the count from ten, so the position of the letter in the alphabet after A, plus ten, gives its value.
Read the full article: Number Systems and Data Representation in Computers
Practice Questions
View allWhat is the hexadecimal equivalent of this binary number (1110)2?
- A.F
- B.B
- C.A
- D.E
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Hexadecimal has base 16, and because 2 raised to the power 4 equals 16, exactly four binary bits make one hexadecimal digit.
Read the full explanation →The binary equivalent of octal number 627 is:
- A.111010110
- B.110010110
- C.110010111
- D.011010111
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Octal has base 8, and because 2 raised to the power 3 equals 8, every octal digit expands into exactly three binary bits.
Read the full explanation →(1101 0001)2 binary number is same as which octal number?
- A.(321)8
- B.(123)8
- C.(641)8
- D.(146)8
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To turn a binary number into octal, group the bits in threes starting from the rightmost bit, adding leading zeros to complete the last group, because three bits cover the eight octal digits.
Read the full explanation →The difference between the two binary numbers 10010000 and 1111001 is:
- A.11101
- B.11011
- C.10111
- D.10011
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The safest way to handle a binary subtraction in an examination is to convert both numbers to decimal, subtract, and convert the answer back.
Read the full explanation →How many bits make one nibble?
- A.2
- B.4
- C.8
- D.16
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A bit, short for binary digit, is a single 0 or 1 and is the smallest unit of data a computer handles.
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