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Data Storage Units and Conversion Quiz

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Questions and Answers

What is the denary equivalent of the binary number 1011001?

89 (correct)

117

177

What is the binary representation of the denary number 12?

0011

1100 (correct)

0110

1111

How many bits are in a nibble?

4 (correct)

What is the next storage unit after a gigabyte (GB)?

Terabyte (TB) (D) Signup and view all the answers

Which of these is NOT a valid binary representation of a denary number?

21000110 (B) Signup and view all the answers

Which of these is NOT a benefit of image compression?

Improved image quality (A) Signup and view all the answers

Which of the following is NOT a characteristic of image compression techniques?

Improved image quality (A) Signup and view all the answers

How does image compression contribute to faster download times?

By decreasing the size of the data that needs to be downloaded (B) Signup and view all the answers

Image compression is useful for reducing the chances of data transmission errors. How does this work?

By reducing the total amount of data being transmitted, fewer packets need to be sent. (C) Signup and view all the answers

How does compressed data differ from the original data?

Compressed data has the same information content as the original, but stored more compactly. (C) Signup and view all the answers

Study Notes

Data Storage Units

Bit: The smallest unit of data, represented by 0 or 1
Nibble: 4 bits
Byte: 8 bits
Kilobyte (KB): 1024 bytes
Megabyte (MB): 1024 KB
Gigabyte (GB): 1024 MB
Terabyte (TB): 1024 GB
Petabyte (PB): 1024 TB

Converting Denary to Binary

Divide by 2 Method:
- Repeatedly divide the denary number by 2, keeping track of the remainders.
- The remainders, read from bottom to top, form the binary equivalent.
Example: To convert 89 to binary:
- 89 / 2 = 44 remainder 1
- 44 / 2 = 22 remainder 0
- 22 / 2 = 11 remainder 0
- 11 / 2 = 5 remainder 1
- 5 / 2 = 2 remainder 1
- 2 / 2 = 1 remainder 0
- 1 / 2 = 0 remainder 1
- Binary equivalent is 01011001
Binary to Denary Conversion (Line Method):
- Assign a value (128, 64, 32, 16, 8, 4, 2, 1) to each bit position, moving from left to right.
- Add the values of the positions where a bit is 1.
- Example: 01011001 (binary number):
  - 64 + 16 + 8 + 1 = 89 (denary number)

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Description

Test your knowledge on data storage units and the conversion between denary and binary systems. Understand the different sizes from bits to petabytes and practice converting numbers using the methods provided. This quiz will enhance your understanding of fundamental data storage concepts.