Define HCI. What is performance in the HCI context?
What will be an ideal response?
HCI is a way of ensuring system functionality and usability, providing effective user interaction support, and enhancing a pleasant user experience. In this case, the term performance refers to a combination of the efficiency involved in performing a task and the quality of the work that is produced by the task.
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A user notices the printer that is used for printing global shipper's labels is missing columns in the printed labels. The special label stock is new and appears to be fine. Which of the following should the technician perform FIRST when troubleshooting this problem?
A. Remove any stuck labels from the paper path B. Clean the pickup rollers and check them for wear C. Clean the print head with approved materials D. Replace and realign the print head
Answer the following statements true (T) or false (F)
1) A database table is an example of a PL/SQL composite data type. 2) A PL/SQL record can be set to a NULL value with an assignment, in which case all its fields are set to NULL. 3) A record that contains another record as a field is called the enclosing record. 4) A PL/SQL table has a specified number of rows, which cannot be changed, at declaration time. 5) A PL/SQL table has two columns, a primary key column and a data column.