Addressing Modes in Computer Architecture
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Questions and Answers

What is the primary disadvantage of immediate addressing?

  • It involves complex calculations
  • The address field is restricted to the size of the address field (correct)
  • The address field is larger than the word length
  • It requires multiple memory references

    • In direct addressing, what does the address field contain?

  • Effective address of the operand (correct)
  • Memory reference
  • Word length
  • Special calculation

    • What is a characteristic of register addressing that distinguishes it from direct addressing?

  • Address field refers to a main memory location
  • It requires no memory reference
  • It has a large address field in the instruction (correct)
  • It involves special calculations

    • Why does register indirect addressing require only one memory reference?

    <p>Register stores data without need for memory access</p> Signup and view all the answers

    What advantage does indirect addressing have over direct addressing?

    <p>Requires less memory references</p> Signup and view all the answers

    How does register access compare to memory access?

    <p>Register access is faster than memory access</p> Signup and view all the answers

    What is addressing mode?

    <p>How the bits of an instruction are organized to define the operand addresses and operation</p> Signup and view all the answers

    Which addressing technique involves the operand being actually present in the instruction?

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

    What is the advantage of immediate addressing mode?

    <p>Does not require any memory reference other than the instruction fetch</p> Signup and view all the answers

    In the notation mentioned, what does 'EA' stand for?

    <p>Effective address</p> Signup and view all the answers

    Which addressing mode can be used to set initial values of variables?

    <p>Immediate addressing</p> Signup and view all the answers

    What does 'X' represent in the notation provided?

    <p>Contents of location X</p> Signup and view all the answers

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