Khan Academy - Computers Flashcards
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Questions and Answers

What is the logic gate that corresponds to the truth table provided?

OR Gate

Which of these lists correctly sorts components from high-level to low-level?

  • integrated circuit, transistor, logic gate, computer
  • transistor, logic gate, integrated circuit, computer
  • computer, integrated circuit, logic gate, transistor (correct)
  • logic gate, computer, transistor, integrated circuit

    • Sort the files from largest size to smallest size:

  • "familytree.ged" (32 KB), "notes.txt" (450 B), "grandma_bw.jpg" (900 KB), "grandfather.jpg" (2 MB), "interview.mov" (1.2 GB), "reunion.mov" (15 GB)
  • "grandfather.jpg" (2 MB), "grandma_bw.jpg" (900 KB), "familytree.ged" (32 KB), "notes.txt" (450 B), "interview.mov" (1.2 GB), "reunion.mov" (15 GB)
  • "reunion.mov" (15 GB), "interview.mov" (1.2 GB), "grandfather.jpg" (2 MB), "grandma_bw.jpg" (900 KB), "familytree.ged" (32 KB), "notes.txt" (450 B) (correct)
  • "interview.mov" (1.2 GB), "grandfather.jpg" (2 MB), "grandma_bw.jpg" (900 KB), "familytree.ged" (32 KB), "notes.txt" (450 B), "reunion.mov" (15 GB)

    • What is a possible state of the inputs A/B/C/D if the final output is 000?

    <p>A = 0, B = 1, C = 0, D = 0</p> Signup and view all the answers

    What is the minimum number of bits that can represent 2 options?

    <p>2</p> Signup and view all the answers

    Match the following terms with their corresponding binary values:

    <p>on = 1 off = 0 low = 0 high = 1 false = 0 true = 1</p> Signup and view all the answers

    How does a computer store numbers in memory?

    <p>Using the binary number system.</p> Signup and view all the answers

    What are the possible states of inputs A and B if the output is 111 and input C is 111?

    <p>Input A is 1, input B is 0</p> Signup and view all the answers

    How many bits of information can 3 wires represent?

    <p>3</p> Signup and view all the answers

    Complete the truth table for an OR gate: Input A Input B Output: 1 1 __, 1 0 __, 0 1 __, 0 0 __

    <p>1, 1, 1, 0</p> Signup and view all the answers

    What is the best description of a logic gate?

    <p>It outputs 0 or 1 based on input values and a Boolean function.</p> Signup and view all the answers

    What should Marquis do to convert a GIF photo to JPEG?

    <p>Open the file in an image editing application, export it as a JPEG, and upload the exported JPEG file.</p> Signup and view all the answers

    What is a possible state of the inputs A/B/C/D if the final output is 000?

    <p>A = 0, B = 0, C = 0, D = 0</p> Signup and view all the answers

    Why is the CPU important in a computer?

    <p>Without a CPU, the computer can't process the data that comes from the keyboard.</p> Signup and view all the answers

    Complete the truth table for an OR gate: Input A Input B Output: 0 0 __, 0 1 __, 1 0 __, 1 1 __

    <p>0, 1, 1, 1</p> Signup and view all the answers

    Which displays could be represented by a single bit?

    <p>Both A and B</p> Signup and view all the answers

    What values can a binary digit represent?

    <p>0 or 1</p> Signup and view all the answers

    Study Notes

    Logic Gates and Truth Tables

    • Truth tables display output values of logic gates based on input combinations.
    • An OR gate outputs 1 if at least one input is 1; its truth table includes rows: 00 → 0, 01 → 1, 10 → 1, 11 → 1.
    • AND gate requires all inputs to be 1 for a 1 output; input combinations are essential in determining outputs in circuits.

    Computer Components Hierarchy

    • Components of a computer are structured from high-level to low-level: computer, integrated circuit, logic gate, transistor.
    • Each level serves a different computational function, from simple to complex operations.

    File Sizes in Computing

    • Understanding file sizes helps organize data; sizes are typically listed from largest to smallest.
    • Examples include files such as "reunion.mov" (15 GB) and "notes.txt" (450 B).

    Circuit Inputs and Outputs

    • Inputs in circuits directly affect outputs; for example, for an AND gate leading to an OR gate, if the output is 111 and input C is 111, combinations of inputs A and B include 00, 01, 10, and 11.

    Binary Representation

    • Computers utilize binary number system for number representation in memory.
    • One wire can represent two states (on/off), therefore, three wires represent three bits of information (2^3 = 8 combinations).
    • Minimum bits required to represent two options are 2 (as 2^2 = 4).

    Logic Gate Functionality

    • A logic gate outputs either 0 or 1 based on specific Boolean functions, linking inputs to outputs critically in circuit design.

    File Format Conversions

    • Changing image file formats (e.g., GIF to JPEG) requires editing software to export the required file type before uploading.

    Digital Alarm Clock Indicators

    • Digital clocks can represent specific indicators with a single bit, such as temperature unit (C/F) and AM/PM status.

    Binary Digit Values

    • A binary digit (bit) can only represent two values: 0 or 1, foundational to digital computing and data representation.

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    Test your knowledge on the fundamentals of computer logic and components with these flashcards. Explore essential concepts like truth tables and the structure of computer systems. Ideal for students seeking a solid grasp of computer science basics.

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