What Do You Know About Data Representation

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| By Kasia111
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Kasia111
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Quizzes Created: 2 | Total Attempts: 7,236
Questions: 8 | Attempts: 213

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What Do You Know About Data Representation - Quiz

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Questions and Answers
  • 1. 

    How computer stores numbers?

    • A.

      Floating Point Representation

    • B.

      Binary

    • C.

      ASCII

    • D.

      Unicode

    Correct Answer
    B. Binary
    Explanation
    Computers store numbers using the binary system, which is a base-2 numeral system. In binary, numbers are represented using only two digits, 0 and 1. Each digit in a binary number is called a bit, and a group of 8 bits is called a byte. The binary system allows computers to represent and manipulate numbers using electronic circuits that can easily distinguish between two states, such as on/off or high/low voltage. This binary representation is the foundation for all numerical operations and calculations performed by computers.

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  • 2. 

    How many bits are in 1 byte?

    • A.

      24

    • B.

      1024

    • C.

      8

    • D.

      16

    Correct Answer
    C. 8
    Explanation
    A byte consists of 8 bits. Each bit can be either a 0 or a 1, and when combined, they form a byte. Therefore, the correct answer is 8.

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  • 3. 

    How real numbers are represented by the computer?

    • A.

      Binary

    • B.

      ASCII

    • C.

      Floating Boat Representation

    • D.

      Floating Point Representation using Mantissa and Exponent

    Correct Answer
    D. Floating Point Representation using Mantissa and Exponent
    Explanation
    Real numbers are represented by computers using the Floating Point Representation using Mantissa and Exponent. This representation allows for a wide range of real numbers to be accurately represented, including both very large and very small numbers. The mantissa represents the significant digits of the number, while the exponent determines the scale or magnitude of the number. This representation is commonly used in computer systems and programming languages to perform complex calculations involving real numbers.

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  • 4. 

    How graphics are represented by the computer?

    • A.

      Binary

    • B.

      Bitmap

    • C.

      ASCII

    • D.

      Unicode

    Correct Answer
    B. Bitmap
    Explanation
    Bitmap is the correct answer because graphics are represented by the computer using a bitmap format. In bitmap, an image is divided into a grid of pixels, where each pixel is assigned a specific color value. The computer then uses these color values to recreate the image on the screen. Bitmap images are widely used in computer graphics as they provide a detailed representation of an image, allowing for precise manipulation and editing.

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  • 5. 

    How text is represented by the computrer?

    • A.

      Binary

    • B.

      Floating Point Representation

    • C.

      Bitmap

    • D.

      ASCII

    Correct Answer
    D. ASCII
    Explanation
    ASCII stands for American Standard Code for Information Interchange. It is a character encoding standard that represents text in computers. ASCII uses a 7-bit code to represent characters, with each character assigned a unique numerical value. This numerical value can be easily converted to binary, allowing the computer to understand and process the text. ASCII includes standard characters such as letters, numbers, punctuation marks, and control characters. It is widely used in computer systems and communication protocols to represent text data.

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  • 6. 

    How many characters can ASCII represent?

    • A.

      314

    • B.

      100

    • C.

      59

    • D.

      128

    Correct Answer
    D. 128
    Explanation
    ASCII (American Standard Code for Information Interchange) is a character encoding standard that represents characters using numeric codes. It uses a 7-bit code, which means it can represent 2^7 = 128 different characters. Therefore, the correct answer is 128.

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  • 7. 

    Why computers use binary?

    • A.

      Because there's no other method

    • B.

      Because it's easy and stops signal degradation

    • C.

      Because it sounds nice

    • D.

      Any of those

    Correct Answer
    B. Because it's easy and stops signal degradation
    Explanation
    Computers use binary because it is easy to implement and it helps prevent signal degradation. Binary is a simple system that uses only two digits, 0 and 1, which makes it easier for computers to process and manipulate data. Additionally, binary signals are less prone to errors and interference compared to analog signals, which can degrade over long distances or due to external factors. Therefore, using binary ensures reliable and efficient communication within computer systems.

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  • 8. 

    In how many bits, words: Data representation would be stored by the computer using ASCII?

    • A.

      19

    • B.

      18

    • C.

      152

    • D.

      136

    Correct Answer
    C. 152
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