1. Massive Open Online Courses (MOOC) are changing the world of education by providing free online courses.

2. MOOC is a web-based free distance learning program that ensures the participation of students from geographically remote areas in the field of education.

3. It offers free online courses for higher education, executive education and employee development.

1. PPI (pixels per inch) refers to display resolution, or, how many individual pixels are displayed in one inch of a digital image.

2. DPI (dots per inch) refers to printer resolution, or, the number of dots of ink on a printed image.

3. The physical size of an image refers to the dimensions in which it will print (ex: 8.5" x 11") or the pixel dimensions of an image displayed on the web (ex: 600 pixels x 800 pixels).

1. The primary purpose of a computer is to process data and convert it into information. Data is defined as unprocessed information, which is then processed or structured to provide meaningful results. Information is defined as data that can be used for a specific purpose.

2. Computers process data in the following ways-

- Input: Computers receive data through input devices, such as a keyboard, mouse, or camera.

- Processing: Computers process data through processors. The processor operates on data according to a set of instructions.

- Output: Computers display data through output devices, such as monitors, printers, or speakers.