| List II (Descriptions) | ||
|---|---|---|---|
| A | Free software | I | Users have the freedom to run, copy, change or adapt free software |
| B | Freeware | II | It is a software a user can download from the internet free of charge |
| C | shareware | III | Users are allowed to try out some software free change for a trial period |
| D | Firewall | IV | Helping to prevent viruses or jackers entering the user computer(or internet network) |
| List I | List II | ||
| A | Keyboard Interrupt | I | It is raised when the user accidently hits the Ese key while executing a program, due to which the normal flow of the program |
| B | Type Error | II | IT is raised when the file specified in a program statement cannot be opened. |
| C | IO Error | III | IT is raised when the file specified in a program statement cannot be opened |
| D | Import Error | IV | IT is raised when the requested module definition is not found |