Changing the Desktop Background

Changing the desktop background

Personalize is the display options which can change the desktop background on the desktop screen option. To change the desktop background, follow the given steps. You want to keep changes on the desktop background then following steps.

1. Right click on the mouse pointer at any empty area on the desktop.

2. Select the personalize option and then click the option.

3. Automatically it display the window on the screen which is shown below.

4.Click and select any one of the themes for setting an desktop screen.

5.Automatically It apply the theme on the desktop screen.

How to choose the desktop background

Here The following steps how to select/choose the desktop background on the desktop screen.

1. Right click on the mouse pointer in the desktop screen.
2. Click on the personalize option then a window appear.
3. Select the desktop background option in the personalize settings which is shown below.

4. Double click on the desktop background then all window themes will be appear.

5. Select any one of the theme and click the save changes.

6. You can select the picture position on the screen like Fill, Fit, Stretch, Title, Center.

7. You can select and change the picture changing time like 1 min, 5 Min, 10 min, 30 min, and 1 hr.

8. Finally click the save changes button. 

Different Type Of Memories

Different Type Of Memories

Any storage unit of a  computer system is ranked according to the following criteria. They are :

1. Access time 

2. Storage capacity

3. Cost per bit of storage

➤Access time: This is the time required to locate and retrieve storage data from the  storage unit in response unit response to a program instruction. A fast access time is preferred.
➤Storage capacity: It is the amount of data that can be stored in the storage unit.

➤Cost per bit of storage : An obvious goal is to minimize the cost.

According to the above criteria storage units are basically two types. They are:

1. Primary storage section.
2. Secondary storage section.

As compared to secondary storage units, primary storage units have faster access time, smaller storage capacity, and higher a cost per bit of storage.

A primary (or) Internal storage section is basic to all computers. it is made up of several small storage areas called locations or cell. A special type of memory is known as cache memory. primary memory decided into the following.

RAM: Primary storage is usually referred to as Random access memory. Because it is possible to randomly select and use any location of memory to directly store and retrieve data and instructions.

RAM is usually referred to as read/write memory because information can be read form RAM chip and can Also be written into it. When the power supply is switched off the information stored inside in RAM will be loss. 

Ram Can classified into 2 types They are 

1. SRam (Static Random Access Memory)
2. DRam (Dynamic Random Access Memory)

•  DDR
•  DDR2
•  DDR3
•  DDR4
•  DDR5

ROM: A Read only memory (ROM) is one in  which the information is permanently stored. The information from the memory van only be read and it is not possible to write fresh information into it. But in the case of ROM when the computer is switched off  the information will not be lost.

ROM is further divided into PROM, EPROM, EEPROM.

PROM: A  variation of ROM chip is programmable read only memory. ROM chips are supplied by the computer system manufacturer and it is not possible for a customer to modify the programs stored in the ROM chip.

PROMs are programmed to record information using a special facility known as a prom-programmer. However, once the chip has been programmed the recorded information cannot be changed.

EPROM: Once the information is stored in the ROM chip (or)a PROM chip can't be changed (or) altered. However, there is another type of memory chip called erasable programmable read only memory that over comes this problem.

EPROM chip can be reprogrammed by using special prom-programmable facility. EPROMs are mainly used by R&D personnel because they frequently change the micro-programs to test the efficiency of the computer system with new programs.

EEPROM: EEPROM is known as erasable programmable read only memory. it  is the advanced one of EPROM.

Cache memory

A special very high speed memory is sometimes used to increase the speed of processing by making current programs and data available to the CPU at a rapid time. In many situations performance of the processors are limited due to the slow speed of the main memory. 

A technique is used to compensate for the mismatch in operating speeds is to employ an extremely fast, small memory between CPU and main memory whose access time is close to the processing speed of the CPU. This type of memory is called high speed buffer (or) cache memory.

The most important effect of cache memory is in improving the memory transfer rates and thus raising the processor speed.