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#### Number Systems Important Questions

11th Standard

Reg.No. :
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Computer Science

Time : 01:00:00 Hrs
Total Marks : 50
5 x 1 = 5
1. How many bytes does 1 KiloByte contain?

(a)

1000

(b)

8

(c)

4

(d)

1024

2. What is the 1's complement of 00100110?

(a)

00100110

(b)

11011001

(c)

11010001

(d)

00101001

3. Which amongst this is not an Octal number?

(a)

645

(b)

234

(c)

876

(d)

123

4. NOR is a combination of?

(a)

NOT(OR)

(b)

NOT(AND)

(c)

NOT(NOT)

(d)

NOT(NOR)

5. NAND is called as ......Gate

(a)

Fundamental Gate

(b)

Derived Gate

(c)

Logical Gate

(d)

Electronic gate

6. 5 x 2 = 10
7. What is data?

8. Write the 1's complement procedure

9. What Is Boolean Algebra?

10. Write the associative laws?

11. What are derived gates?

12. 5 x 3 = 15
13. Write the De Morgan's law.

14. Perform the following expressions. (COFFEE)16 = (?)2

15. Complete the following Octal numbers 365, 366, 367,.......

16. Write the steps to find 2's complement

17. What is radix of a number system? Give example

18. 4 x 5 = 20
19. Write the procedure to convert fractional Decimal to Binary

22. Convert the Following - (3674)8 $\rightarrow$ (?2) = (?)10