Computer Systems Basics: CPU, Memory, and Data

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Questions and Answers

What is meant by CPU clock speed?

  • The amount of memory in the CPU
  • The total number of CPU cores
  • The size of the CPU in micrometers
  • The speed at which instructions are executed (correct)

What does 1 GHz represent in terms of cycles?

  • 1 Trillion cycles
  • 1 Million cycles
  • 1 Thousand cycles
  • 1 Billion cycles (correct)

Which of the following represents the smallest unit of information?

  • Byte
  • Bit (correct)
  • Megabyte
  • Kilobyte

What is a defining characteristic of ROM?

<p>Its contents are fixed during operation (C)</p> Signup and view all the answers

Which statement is true regarding RAM?

<p>It refreshes its contents when the PC is on (C)</p> Signup and view all the answers

What does clock speed measure in a CPU?

<p>The frequency at which instructions are executed (B)</p> Signup and view all the answers

What is the equivalent of 1 GHz in terms of cycles per second?

<p>1 billion cycles/second (B)</p> Signup and view all the answers

What is defined as the smallest unit of information?

<p>Bit (C)</p> Signup and view all the answers

Which statement about RAM is accurate?

<p>The contents of RAM are fixed during use (C)</p> Signup and view all the answers

What does the term NUM refer to in a computing context?

<p>The operations completed when the PC is turned on (A)</p> Signup and view all the answers

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Study Notes

CPU Speed Measurement

  • CPU speed is measured by the frequency at which it executes instructions.
  • Clock speed is the frequency at which instructions are executed.
  • 1 GHz = 1 Billion cycles per second.
  • 1 MHz = 1 Million cycles per second.
  • 1 Hz = 1 Cycle per second.

Data Units

  • Bit: The smallest unit of information.
  • Byte: Represents a single character.

Memory Types

  • ROM (Read-Only Memory): The contents of ROM are fixed during operation. You cannot write to this type of memory.
  • RAM (Random Access Memory): The contents of RAM are changeable during operation. The operating system refreshes RAM when the PC is on.
  • NUM: The operations completed when the PC is turned on. (Note: "NUM" likely refers to "NUMA" or "Non-Uniform Memory Access", which describes a memory architecture, not a type of memory itself)

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