Question

Explain the three stage of computing with the help of block diagram

Answer 1

Explanation:

Computer Block Diagram System: Mainly computer system consists of three parts, that are central processing unit (CPU), Input Devices, and Output Devices. The Central Processing Unit (CPU) is divided into two parts again: arithmetic logic unit (ALU) and the control unit (CU).

Answer 2

Answer:

Block diagram of computer is a blueprint that represents the internal structure of computer system, as well as showing overview of internal working flowchart of computer system.

Explanation:

• For the step-by-step understanding of how the computer processes the information and outputs it, we have to see the block diagram of the computer system.
• In the following way, the computer processes the information.
• In the input unit, the user’s data is passed, then it is converted into the machine-readable form, and then this data is stored in the computer’s memory unit.
• From the memory, this data is passed to the CPU of the computer system, and in the CPU the ALU does all the necessary arithmetic operations on it with the central processor.
• Now, the processed data is stored in the computer’s main memory and then the memory will decide when to output this data.
• From the main memory, this data is passed to the output unit of the computer system and the user gets it.
• All this traveling of data throughout the whole computer system is controlled by the Control Unit of the CPU.
• Every person who is studying computer science or is a professional computer scientist should know and how to draw the block diagram of the computer system in this section, we will draw the block diagram of the computer system by hand and by computer software.
• Computer system performs all tasks along with the combination of major four components, Therefore here we will cover all possible things about components of block diagram of computer system along with their functions; below shown all things step by steps, you can read them:

• Input Unit
• Central Processing Unit
• ALU – Arithmetic Logic Unit
• CU – Control Unit
• Memory Unit
• Primary memory
• Secondary memory
• Output Unit
• Input Unit

Input Unit contains the input devices like as scanner, joystick, keyboard, mouse, etc. These input devices allow to user for inserting the instruction or information into the computer system. Input unit plays the role as a mediator of communication that gets the data from user to the computer system for organized manner for processing.

Central Processing Unit

CPU (Central Processing Unit) is also called the “Brain” or “Heart” of the computer system. CPU is a hardware electronic device that is capable to perform various types of operations like as arithmetic and logical operation. It has ability to perform all calculations, comparisons or operations inside of the CPU.

Arithmetic and Logic Unit

• ALU (Arithmetic logic unit) has responsible to perform all arithmetic and logic operations, which are data inserted via input devices, is stored in the main memory storage unit.
• Arithmetical Unit can handle few simple operations like as addition, subtraction, division, and   multiplication.
• Logical Unit is capable to control the logical operations like as AND, OR, EQUAL, GREATER THAN, and LESS THAN, and so on.
• Other operations like as comparing, selecting, matching, and merging data are also performed by Logical Unit.
• Logical Unit is also able to perform Bit-shifting operations like as left shift is represented by the << operator and the right shift is represented by the >> operator.

Control Unit

• The control unit (CU) deals to perform all activities and operations of computer inside the CPU. Control unit has a responsible to control input/output, memory, and other devices which are linked to CPU.
• Control unit obtains the set of instructions or information, then it helps to convert the instruction set to control signals, then these signals are moved to central processor for later processing. CU is able to understand which types of operations to execute with accurately. The control signals are getting to help as per the prioritizing and scheduling the activates. It allows to make coordination all task inside computer in syn along with input and output units.

Memory Unit

• Memory unit also plays the major role in the computer system because it helps to store data and instructions before and after processing. This unit transfers the set of instructions to another unit of system as per the need.

Output Unit

• The output unit of the computer system delivers the results of computation and displaying the output outside the world. The output unit generally works as the opposite process of the input unit and it convert the binary language digitalized information to electronic impulses, which are readable to the output devices. There are few output devices, which are commonly used like as monitor, projector, headphone, speaker, etc.
• Output unit provides the result into two forms like as soft copy or hard copy. The monitor is used for soft copy as displaying on the screen, whereas printer is used for hard copy as displaying on the paper.

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