All Computers (Mainframe, Mini or Micro) must have

The correct option is (4)

More than one of the above

Key Points

• All processors, whether in micro, mini, or mainframe computers, must have an ALU, primary storage, and control unit.
• The component of a computer processor (CPU) known as an arithmetic-logic unit (ALU) performs arithmetic and logic operations on the operands in computer instruction words.
• Random access memory (RAM) is referred to as primary storage, and the internal hard drive of the computer is referred to as secondary storage.
• RAM, often known as "memory," is referred to as primary storage since it houses data that the computer's CPU may access immediately.
• The control unit (CU), a part of the central processing unit (CPU) of a computer, controls how the processor is used. It specifies how the memory, arithmetic/logic unit, input, and output devices of the computer should react to the instructions sent to the processor.