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Match $\text{List-I}$ with $\text{List-II}$:

$$\begin{array}{llll}  & \textbf{List I} && \textbf{List II} \\ \text{(a)} & \text{Micro operation} & \text{(i)} & \text{Specify micro operations} \\  \text{(b)} & \text{Micro programmed control unit} & \text{(ii)} & \text{Improve CPU utilization} \\\text{(c)}& \text{Interrupts} & \text{(iii)}& \text{Control Memory} \\  \text{(d)} & \text{Micro instruction} & \text{(iv)}& \text{Elementary operation performed} \\ &&& \text{on data stored in registers} \\  \end{array}$$

Choose the correct option from those given below:

  1. $\text{(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)}$
  2. $\text{(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)}$
  3. $\text{(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)}$
  4. $\text{(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)}$
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$\underline{\textbf{Answer:}\Rightarrow}\;\text{Option}\;\textbf{1)a-iv,b-iii,c-ii,d-i}$ 

$\underline{\textbf{Explanation:}\Rightarrow}$

$\underline{\textbf{a)Micro-operation:}\Rightarrow}$

It is the basic operations that are performed on the stored data in registers, such as performing Arithmetic and Logic operations and transferring data between two registers.

$\therefore$ $\mathbf{(iv)}$ matches.

https://en.wikipedia.org/wiki/Micro-operation

$\underline{\textbf{b)Micro programmed control Unit:}\Rightarrow}$

The binary control variables of this control unit are stored in memory.

It deals with several units of software but at the micro-level, such as micro-operation, micro-program, and micro-instructions.

$\therefore$ It is related to the control memory.

$\therefore$ $\mathbf{(iii)}$ matches.

$\textbf{Hardwired Control Unit:}$

The generation of control signals by hardware using traditional logic architectures.

https://www.geeksforgeeks.org/computer-organization-hardwired-vs-micro-programmed-control-unit/

$\underline{\textbf{c) Interrupts:}\Rightarrow}$

It is an input signal that is given to the processor which implies that a certain event requires immediate consideration.

It is usually done to execute computer multitasking, mainly in real-time computing.

It is just temporary.

Systems that make use of interrupts this way are called to be $\textbf{interrupt-driven}$.

$\therefore$ $\mathbf{(ii)}$ matches.

https://en.wikipedia.org/wiki/Interrupt

$\underline{\textbf{c) Micro-instruction:}\Rightarrow}$

Control words in the micro routine are called micro-instructions.

Each microinstruction is categorized into $5$ fields: label, micro-operations, CD, BR, and AD.

$\therefore$ $\mathbf{(i)}$ matches.

$\therefore \;1)$ is the right option.


http://www.pvpsiddhartha.ac.in/dep_it/lecturenotes/CSA/unit-3.pdf

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Option 1 considering micro-operation, CPU performance by interrupt, control memory, control signal generation by hard wired circuits.
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  • Micro operation -  it is a basic register to register transfer operation performed on data stored in the register.
  • Micro instruction -  it is a set of micro-operations.
  • Micro program control unit -  A memory that is part of the control unit is control memory.
  • Interrupt -  Improve CPU utilization because interrupt decreasing CPU waiting time.

So correct option is $(A).$

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  • Micro operation: Elementary operation performed on data stored in registers In computer central processing units, micro-operations (also known as micro-ops) are the functional or atomic, operations of a processor. These are low level instructions used in some designs to implement complex machine instructions. 

  • Micro programmed control unit: Control Memory To execute an instruction, the control unit of the CPU must generate the required control signal in the proper sequence. Micro programmed control unit fetches microinstructions from the control memory. 

  • Interrupts: Improve CPU utilization Interrupts are important because they give the user better control over the computer. 

  • Micro instruction: Specify micro operations A collection of micro instructions perform a specific micro operation.

 

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