Question

1. Observe the two figures given 

• Write their names 
• What are their uses? 
• Name the device associated with them.

2. RAM cannot be replaced by hard disk in a computer. Why?

Answer 1

1. Their names are 

• Bar code, QR code This is used to store all the information about a product such as name, price, batch, Exp. date etc. 
• Barcode Reader, Mobile camera (Mobile camera can be used to read QR code information).

2. RAM means Random Access Memory. It is also called read and write memory. It is used to store operating system, and other programs, The one and only memory that the processor can be accessed is the primary memory. Hence RAM cannot be replaced by hard disk in a computer.