Introduction

Computers are there in our everyday life. So is in work place. No Banking in todays time can happen without Computer Programs. It is highly essential for a bank employee to have a thorough knowledge about Computers and its various applicaitons. The Government and Bank PO jobs entrance exam has Compuuter Knowledge as a compusory criteria to pass and get the job. Laqshya brings you free of cost Text Notes so that you can prepare in a best possible manner and understand the Computers Subject in depth. Moreover, we had also published a full fledged Computers Glossary on this website.

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What you will learn

Our Main goal is to make Computers easy for every student to understand. In this section you will learn :

• Computers indepth Knowledge
• Improve your skills in definitions
• Glossary to understand every word and its meaning
• Became an exeprt in limited time

1.      Types of BUS

To form an operational system, various parts of the computer are connected by a number of wires. A collection of such wires, which have some common identity, is called a bus. Thus a bus consists of a collection of distinct lines, serving different purposes.

The Data Bus (having lines corresponding to number of bits in the word) is used for transmitting data.

The Address Bus carries the address bits of memory location from CPU to the memory to enable accessing the data in the memory. The bus also contains a few control lines to carry control commands.

Address Bus consists of up to 16 parallel lines (for 16 bit word length computer) along which a binary code can be fed. The code is used as an address to select either a certain storage location in main memory or an input/output port and hence a specific peripheral device.

Data Bus also consists of parallel lines (number being equal to word length) used to carry data and instructions from one unit to another.

Control lines are used to control the flow of information between units.

 

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