Computer fundamentals — match each term in List I with the correct description in List II. List I A. CLP (Control/Logic microcode package) B. SHELL C. DSDD D. Megahertz (MHz) List II 1. Measure of microprocessor clock speed 2. Double-sided, double-density (floppy disk format) 3. Allows you to specify a file/program as the command processor 4. Microcode stored in ROM

Introduction / Context:
This question reviews mixed computer terminology across operating systems, storage media, and processor metrics. Correctly recognizing each term helps avoid confusion between hardware-level microcode concepts, OS command interfaces, legacy disk formats, and performance units.

Given Data / Assumptions:

• CLP is taken here to denote a control/microcode package held in ROM at a low level of the CPU's control unit.
• SHELL denotes a command interpreter (e.g., bash, cmd.exe) that can be replaced or configured by specifying a file.
• DSDD stands for double-sided, double-density in floppy-disk technology.
• Megahertz (MHz) measures clock frequency.

Concept / Approach:

Map each term to its natural domain: micro-architecture (CLP → microcode in ROM), OS command interface (SHELL → command processor), removable magnetic media (DSDD → disk capacity/format), and performance metric (MHz → clock rate).

Step-by-Step Solution:

Verification / Alternative check:

CPU design texts describe stored-program control via microcode ROMs; OS documentation explains configuring a shell; legacy PC references list DSDD floppy specs; MHz is universally used for clock rates and radio frequencies.

Why Other Options Are Wrong:

• Swapping MHz with storage terms conflates time-rate with capacity format.
• SHELL ≠ microcode; one is software at user/system level, the other is hardware-level control.
• CLP is not a disk descriptor and DSDD is not a command interpreter.

Common Pitfalls:

Confusing DSDD (density, sides) with high-density (HD) formats; mixing up shell customization with scripting languages; and interpreting MHz as throughput instead of frequency.

Final Answer:

A-4, B-3, C-2, D-1