Components of a digital computer , Basic Computer Science


A digital computer is an electronic device that receives data, performs arithmetic and logical operations and produces results according to a predetermined program. It receives data through an input device (usually keyboard) and displays the results to some output device (usually monitor). All data processing in a digital computer is done by a central processing unit, also known as processor. A working memory is used to store data and instructions. Figure presents a block diagram of a digital computer identifying the key components and their interconnection.   



The key elements of a digital computer, as elaborated in the block diagram given in Figure include: Central Processing Unit, Input, Output and Memory. The Central Processing Unit (CPU) is like the brain of the computer. It is responsible for executing instructions. It controls and coordinates the execution of instructions. It is comprised of a Control Unit (CU), an Arithmetic & Logic Unit (ALU) and registers. The CU controls the execution of instructions by decoding the instruction and generating micro-operations to be performed for executing that instruction. The ALU is responsible for performing arithmetic and logic operations. Execution of an instruction involves almost all parts (CU, ALU & Registers) of the CPU. Hence, CPU is known as the most vital component of a computer system.  

Posted Date: 10/22/2012 3:27:35 AM | Location : United States

Related Discussions:- Components of a digital computer , Assignment Help, Ask Question on Components of a digital computer , Get Answer, Expert's Help, Components of a digital computer Discussions

Write discussion on Components of a digital computer
Your posts are moderated
Related Questions
Multiprocessor DSP Systems Over modern times several organizations have provided forums made up of several DSPs. More lately, semiconductor organizations have been providing sn

#questionexplain strategic mis categories in detail with illustration..

TELECOMMUNICATION PROTOCOLS: The two major components relating to a WAN are the Protocol and the Media. The media are the actual path ways that the protocol travels on. The ne

Resource sharing is a concept which has developed to contain many cooperative activities among libraries and other stakeholders. Interlibrary loan continues to be the basis of reso

function to delete a telephone book record in c programing using struct and objects...?

Interpreter: An interpreter is a program that translates each statement in the programming language into machine code and runs it.  Such an arrangement means that to run the

Application Software:   Application software is designed and developed to accomplish one or more specific task or solve a particular problem.    Application software may be

what is the short and complete definition of computer

Brief Define the Phases of Waterfall Model

Indexing and Abstracting Databases: A study of growth of indexing and abstracting services over the years would show that during the past two centuries, these services have be