Page 39 - Cs_withBlue_J_C11_Flipbook
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5. In a binary number system, the leftmost bit contains maximum weight and is called ………………… .
a. MSB b. LSB
c. Both a and b d. None of these
6. Which of the following is not a positional number system?
a. Roman Number System b. Octal Number System
c. Binary Number System d. Hexadecimal Number System
7. 7’s complement of Octal number 523 is ………………… .
a. 777 b. 365
c. 254 d. 255
8. Adding hexadecimal digits, A with C will give ………………… .
a. sum=1, carry=6 b. sum=6, carry=1
c. sum=5, carry=1 d. sum=7, carry=1
9. Adding binary numbers 110 and 1100 gives ………………… .
a. 10010 b. 10010
c. 010010 d. 110
10. 16’s complement of a hexadecimal number A9D is ………………… .
a. 562 b. 563
c. 673 d. 674
Answers
1. d 2. b 3. c 4. c 5. a 6. a 7. c 8. b 9. c 10. b
B. Fill in the blanks:
1. The binary equivalent of (0.75) is ………………… .
10
2. The binary equivalent of hexadecimal digit E is ………………… .
3. 2’s complement is obtained by adding ………………… to 1’s complement.
4. The largest two-digit hexadecimal number is ………………… .
5. The result of subtracting the octal number 25 from 56 is ………………… .
6. The binary equivalent of octal 15 is ………………… .
7. Hexadecimal equivalent of octal 23 is ………………… .
8. Adding octal numbers 46 and 22 results in ………………… .
9. Adding hexadecimal numbers, A and B gives ………………… .
10. The octal equivalent of binary 10010 is ………………… .
11. The binary number 11.1 is equal to the decimal number ………………… .
12. Adding binary numbers 1+1+1+1 gives the result as ………………… .
Answers
1. 0.11 2. 1110 3. 1 4. FF 5. 31 6. 1101
7. 13 8. 70 9. 15 10. 22 11. 3.5 12. 100
C. Answer the following questions:
1. What is a number system? Explain.
Ans. A number system is defined as the representation of numbers by arranging digits or symbols in order of their place values.
The value of any digit in a number can be determined by that digit, its position in the number, and the base of the number
system.
The number system is a way of denoting numbers using digits or symbols. It also follows a definite set of rules to denote its actual
value. The value of any number depends on three factors:
a. digits or numerals
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