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Computer Architecture and Instruction Fields Quiz
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Computer Architecture and Instruction Fields Quiz

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Questions and Answers

According to Flynn's Taxonomy, how are computer architectures classified?

  • Based on the manufacturer and year of production
  • Based on the number of instructions that can be executed and how they operate on data (correct)
  • Based on the speed of processors and size of data streams
  • Based on the color and shape of the computer hardware
  • What is the crux of parallel processing according to the text?

  • Memory modules
  • CPUs (correct)
  • Operating systems
  • Input/output devices
  • In Flynn's Taxonomy, what does SIMD stand for?

  • Single Input, Multiple Devices
  • Single Information, Multiple Devices
  • Single Instruction, Multiple Data (correct)
  • Several Instructions, Multiple Data
  • What is the key factor used to classify computing systems into four major categories?

    <p>Number of instruction and data streams processed simultaneously</p> Signup and view all the answers

    Which addressing mode is being used in the instruction 'AC $\leftarrow$ M[ADR]'?

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

    What does the mnemonic 'SHRA' represent?

    <p>Arithmetic shift right</p> Signup and view all the answers

    In which type of instruction would you find the mnemonic 'COM'?

    <p>Logical and bit manipulation instructions</p> Signup and view all the answers

    What is the purpose of the 'C' flag in the processor status register (PSR)?

    <p>Indicates carry out of the ALU</p> Signup and view all the answers

    What does the mnemonic 'ADDC' stand for?

    <p>Add with Carry</p> Signup and view all the answers

    Which instruction type includes the mnemonic 'MUL'?

    <p>Arithmetic instructions</p> Signup and view all the answers

    What does the mnemonic 'ROL' represent?

    <p>Rotate left</p> Signup and view all the answers

    What is the purpose of the 'S' flag in the processor status register (PSR)?

    <p>Sign bit of the ALU's output</p> Signup and view all the answers

    Which component of the CPU is responsible for directing information flow through the ALU by selecting various components and functions?

    <p>Control unit</p> Signup and view all the answers

    What type of notation is suitable for stack manipulation and evaluation of arithmetic expressions?

    <p>Reverse Polish Notation (RPN)</p> Signup and view all the answers

    What type of organization is beneficial for nested subroutines and efficient arithmetic expression evaluation?

    <p>Stack organization</p> Signup and view all the answers

    What are the storage components of the CPU?

    <p>Registers and flags</p> Signup and view all the answers

    Which type of register is used for faster data transfer within the processor in modern CPUs?

    <p>General-purpose registers</p> Signup and view all the answers

    What type of notation encodes ALU operations with specific symbols for arithmetic and logical computations?

    <p>Infix Notation</p> Signup and view all the answers

    What type of memory organization includes program, data, and stack segments?

    <p>Memory stack organization</p> Signup and view all the answers

    What are the execution components of the CPU?

    <p>ALU for arithmetic, logical computations</p> Signup and view all the answers

    What type of notation is generally used for arithmetic expression evaluation in computer architecture?

    <p>Infix Notation</p> Signup and view all the answers

    What is the primary benefit of the stack organization in processors?

    <p>Beneficial for nested subroutines and efficient arithmetic expression evaluation</p> Signup and view all the answers

    What is the purpose of the stack pointer register in memory stack organization?

    <p>To keep track of the top of the stack</p> Signup and view all the answers

    What type of register is generally used for arithmetic and logical computations in processors?

    <p>ALU register</p> Signup and view all the answers

    What does SIMD stand for in Flynn's Taxonomy of Parallel Computing Architectures?

    <p>Single Instruction, Multiple Data</p> Signup and view all the answers

    Which type of parallel computer is the most common according to Flynn's Taxonomy?

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

    What is the characteristic of SISD architecture?

    <p>Uses only one instruction and data stream</p> Signup and view all the answers

    Which architecture uses a single instruction for all processing units and operates on different data elements?

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

    What are the two varieties for SIMD architecture?

    <p>Processor Arrays and Vector Pipelines</p> Signup and view all the answers

    What does MIMD stand for in the context of parallel computing architectures?

    <p>Multiple Instruction, Multiple Data</p> Signup and view all the answers

    Which type of parallel computer can have distributed memory or shared memory according to Flynn's Taxonomy?

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

    What characteristics classify the pattern of connections between processors in parallel computing architectures?

    <p>System topologies</p> Signup and view all the answers

    In Flynn's Taxonomy, which architecture uses a single instruction for all processing units and operates on different data elements?

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

    What is the least common type of parallel computer architecture according to Flynn's Taxonomy?

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

    Which architecture is prevalent in PCs and single CPU workstations according to Flynn's Taxonomy?

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

    What do system topologies classify in the context of parallel computing architectures?

    <p>Pattern of connections between processors</p> Signup and view all the answers

    Which addressing mode specifies the operand itself?

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

    In which CPU organization are one-address instructions commonly utilized?

    <p>Single accumulator organization</p> Signup and view all the answers

    What do autoincrement or autodecrement modes do when used to access memory?

    <p>They automatically adjust the memory address</p> Signup and view all the answers

    Which addressing mode allows large physical memory to be addressed with a relatively small number of bits?

    <p>Indirect addressing mode</p> Signup and view all the answers

    How many address fields are involved in two-address instructions?

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

    Which instruction format depends on the internal organization of the CPU?

    <p>Number of address fields</p> Signup and view all the answers

    What is the primary purpose of the OP-code field in the instruction format?

    <p>Specify the operation to be performed</p> Signup and view all the answers

    Which CPU organization involves an implied AC register for all data manipulation?

    <p>Single accumulator organization</p> Signup and view all the answers

    What does the stack organization primarily use for data manipulation?

    <p>Stack pointer</p> Signup and view all the answers

    Which addressing mode involves a designated register to calculate the address of the operand?

    <p>Indexed Addressing Mode</p> Signup and view all the answers

    What is the distinguishing feature of three-address instructions compared to two-address instructions?

    <p>Additional operand field</p> Signup and view all the answers

    Which addressing mode specifies the register address for the operand?

    <p>Register mode</p> Signup and view all the answers

    Study Notes

    Computer Architecture and Instruction Fields

    • The common bus system instruction fields include the OP-code, Address, and Mode fields that specify the operation to be performed, memory addresses, and address interpretation, respectively.
    • The number of address fields in the instruction format depends on the internal organization of the CPU.
    • The three most common CPU organizations are single accumulator organization, general register organization, and stack organization.
    • Two-address instructions involve OP, AD1, and AD2 fields, while three-address instructions involve OP, AD1, AD2, and AD3 fields.
    • One-address instructions utilize an implied AC register for all data manipulation.
    • Zero-address instructions are found in stack-organized computers and involve operations like PUSH, ADD, MUL, and POP.
    • Addressing modes specify rules for interpreting or modifying the address field of the instruction before the operand is referenced.
    • The types of addressing modes include implied mode, immediate mode, register mode, register indirect mode, autoincrement or autodecrement mode, direct address mode, indirect addressing mode, and relative addressing modes.
    • Immediate mode specifies the operand itself, while register mode specifies the register address for the operand.
    • Autoincrement or autodecrement mode automatically increments or decrements the value in the register when used to access memory.
    • Indirect addressing mode specifies the address of a memory location containing the address of the operand, allowing large physical memory to be addressed with a relatively small number of bits.
    • Relative addressing modes include PC Relative Addressing Mode, Indexed Addressing Mode, and Base Register Addressing Mode, each depending on a designated register to calculate the address of the operand.

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    Description

    Test your knowledge of computer architecture and instruction fields with this quiz. Explore topics such as instruction formats, CPU organizations, addressing modes, and different types of instructions.

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