11th Computer Science Unit - 2 Reduced Syllabus Book Back Questions 2021 English Medium

 2. NUMBER SYSTEMS

Choose the correct answer 

1. Which refers to the number of bits processed by a computer‟s CPU?

A) Byte    B) Nibble    C) Word length     D) Bit

2. How many bytes does 1 Kilobyte contain?

A) 1000    B) 8    C) 4     D) 1024

4. 2^50 is referred as

A) Kilo    B) Tera    C) Peta    D) Zetta

5. How many characters can be handled in Binary Coded Decimal System?

A) 64    B) 255    C) 256    D) 128

6. For 11012 what is the Hexadecimal equivalent?

A) F     B) E    C) D    D) B

7. What is the 1‟s complement of 00100110?

A) 00100110      B) 11011001      C) 11010001     D) 00101001

8. Which amongst this is not an Octal number?

A) 645      B) 234      C) 876     D) 123

Very Short Answers 

1. What is data?

2. Write the 1‟s complement procedure.

3. Convert (46)₁₀ into Binary number

4. We cannot find 1‟s complement for (28)₁₀. State reason.

Short Answers 

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

2. Write note on binary number system.

3. Convert (150)₁₀ into Binary, then convert that Binary number to Octal

5. Add a) -22₁₀+15₁₀     b) 20₁₀+25₁₀

Explain in detail 

1. a) Write the procedure to convert fractional Decimal to Binary

    b) Convert (98.46)₁₀ to Binary

2. Find 1‟s Complement and 2‟s Complement for the following Decimal number

   a) -98       b) -135