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

What advantage does indirect addressing have over direct addressing?

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

How does register access compare to memory access?

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

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

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

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

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

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

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

What does 'X' represent in the notation provided?

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

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