Graphics are pictorial representations and computer graphics are pictorial representations of data. Graphics display shapes, lines and images. There are computer graphic input and output devices (a) Mouse (b) Graphic stylus (c) Graphic tablet (d) light pen (e) Electronic scanning machine (f) digital camera
(i) Physical Protection: It involves the use of security staff and mechanical devices for protection. (ii) Software Protection: This prevents un-authorized users from getting access to the software. (iii) Handshaking: It is a technique, which requires more than a simple password and may b used between two computers or a computer and a user as …
It is a way of protecting data from un-authorized person(s). Reasons for Data Protection (i) To guard against data loss (ii) To avoid corrupting data (iii) To avoid introducing errors in data.
(a) He reads the operating system’s specification for the organization’s use. (b) He maintains every processing activity in a normal condition (c) He renders help when there is abnormal condition.
(a) He safeguides the programs (b) He accepts and care for the data provided by the user department and returns the result from the computer to their clients.
(a) He translates system and program specifications written to instructions codes, which can be understood by computer. (b) He checks for possible interactions within the system and the hardware, which will be used. (c) He is concerned with maintaining the program with original specifications.