Question

_________commands are responded by the Arithmetic and Logical Unit of the computer
1. Primary Memory
2. Control Section
3. External Memory
4. Cache Memory 

Answer 1

Correct Answer - Option 2 : Control Section

The correct answer is Control Section.

• Control section commands are responded by the Arithmetic and Logical Unit of the computer.
• CPU has three main components:
  • Arithmetic Logic Unit (ALU):
    • It performs all the arithmetic operations like addition (+), multiplication (*), subtraction (-), division (/) on the numerical data directed by the control unit. All the logical operations, like less than (<), greater than (>), equal to (=), not equal to (≠), etc. are also carried out by ALU.
  • Control Unit (CU): 
    • ​It controls and coordinates all the operations taking place in the system.
    • It controls the flow of data and information from one unit to the other.
  • Registers/Memory Unit (MU):
    • To execute a program, data and instructions need to be stored temporarily.
    • This storage is done in the MU. The data and instructions are retrieved from MU by Control Unit for supplying to ALU as when required by the program.

 

• Primary memory is the main memory of the system which is directly accessed by the processing units.
  • Examples: RAM, ROM, EPROM, Cache memory, etc.
• External memory comprises devices that store information outside a computer. 
  • Examples: CD, Pen drives, memory cards, etc.
• Cache memory is an extremely fast memory that stores data of the main memory that is used frequently by the CPU.