Practice questions, with answers and explanations included

A minimal superkey — one from which no attribute can be removed without losing the uniqueness property — is called a:

A program that can perform multiple tasks concurrently using independent parts is called:

Which chart is the horizontal version of a column chart and is preferred when labels are large?

If a relation has multiple candidate keys, one of them is designated as the:

Which of these is one of the two ways to create a thread in Java?

A macro in Calc records:

Which constraint specifies that the value of every attribute in a tuple must come from the domain of that attribute?

Which method must be overridden when creating a thread class (whether extending Thread or implementing Runnable)?

By default, recorded macros in Calc use which type of cell referencing?

Which constraint specifies that the primary key of a relation cannot have a NULL value?

Which method is called to actually START the execution of a thread (after creating it)?

Which menu is used to start recording a macro in Calc?

A constraint specified between two relations, involving a foreign key referencing a primary key of another relation, is called:

Which method of the Thread class causes it to suspend execution for a specified number of milliseconds?

While printing a spreadsheet, you can choose to print all sheets, selected sheets, or selected cells only.

A foreign key value, according to the referential integrity constraint, must either:

Classes created by extending the Thread class cannot be extended further; which alternative method of thread creation avoids this limitation?

A chart, once inserted in Calc, cannot be resized or moved afterward.

In a table where a foreign key references the primary key of the SAME table (e.g., Manager_ID referencing Employee_ID), the table is called a:

A wrapper class in Java is used to: