A composite primary key<span> is a set of several primary </span>keys<span> that, together, uniquely identifies each record.</span>
Primary keys are used as identifiers of composite entities. In this case each primary key combination is allowed only once in the *:* relationship.
Other case where primary keys are used is as identifiers of weak entities, where the weak entity has a strong identifying relationship with the parent entity.
Answer:
Statement D is false
D. Java class libraries are not portable = FALSE
Explanation:
Because java class library are portable and JVM (java virtual machine) makes java class library and other java codes portable and platform independent and JVM act as a OS or imaginary CPU for that code.
<span>You cannot advance slides during the slide show by pressing the PAGE DOWN key.
This is a true statement.
</span>
Answer:
The answer is "she uses the keyboard unless she could quickly progress the slides".
Explanation:
Planning is the single least key aspect of having the performance effectively. It is a critical foundation and which can dedicate much space as possible to it and avoids loopholes.
- It is the proper planning that may also ensure, that you have fully considered.
- It is the thing, which we need to convey into your delivery and will also help to boost your trust.
<span>The l</span><span>l command is the commonly predefined alias that is configured to run the ls âl command. The command ls stands for list. So instead of writing list, in Linux you only write the command ls.
The alias are </span>shortcuts and time-savers. By typing ll we'll get the current directory's listing, in long format, including hidden directories.
