Answer:
1. A. True
2. A. True
3. B. Conceptual.
4. Three (3).
Explanation:
An Entity-Relationship Model is used in databases to describe the structure and relationship between data elements known as entities.
1. True: In the Entity-Relationship Model, relationships can have attributes.
2. True: Attributes are the smallest division of data in ER diagram.
3. Conceptual: the level of abstraction which the Entity-Relationship Model most concerned with.
4. Consider the following relationship involving two entities, students and classes: A student can take many classes. A class can be taken by many students. The number of tables which can be used to represent this relationship in a schema is 3 because we are having three (3) parameters which are simply the students and the two entities.
In database management, the term "schema" is used to denote a representation of data.
A database schema is a structure which is typically used to represent the logical design of the database and as such represents how data are stored or organized and the relationships existing in a database management system. There are two (2) main categories of a database schema; physical database schema and logical database schema.
Answer:
system software.
Explanation:
a motherboard is a piece of hardware so thats out.
an applications software is software for an app or websie so that can't run an entire machine.
and an output device is like a speaker or monitor so thats not running the show.
that only leaves the system software. or operating system
Answer:
without an operating system, a computer cannot boot, as it also provides services for the computer programs.
Hope This Helps!!!
Answer:
void mn(int m, int n){
int sum = 0;
int count = 0;
if(m<n){
for(int i = m;i<=n;i++){
sum+=i;
}
}
else{
for(int i = n;i<=m;i++){
sum+=i;
}
}
count = abs(m - n)+1;
cout<<"Sum: "<<sum<<endl;
cout<<"Average: "<<(float)sum/count;
}
Explanation:
This line defines the method
void mn(int m, int n){
This initializes sum and count to 0
int sum = 0;
int count = 0;
This checks if m is less than n
if(m<n){
This iterates from m to n and calculates the sum of numbers between this interval
<em> for(int i = m;i<=n;i++){</em>
<em> sum+=i;</em>
<em> }</em>
<em> }</em>
If otherwise,
else{
This iterates from n to m and calculates the sum of numbers between this interval
<em> for(int i = n;i<=m;i++){</em>
<em> sum+=i;</em>
<em> }</em>
<em> }</em>
This calculates the range from m to n using absolute function
count = abs(m - n)+1;
This prints the calculated sum
cout<<"Sum: "<<sum<<endl;
This calculates and prints the average
cout<<"Average: "<<(float)sum/count;
}
<em>See attachment for complete program that includes the main (in c++)</em>
Answer:
DROP TABLE
Explanation:
DROP TABLE is used to remove a database table in Oracle.
The syntax is DROP TABLE <TableName>;
For example: Suppose there is a table called Student in the database which needs to be removed. Then the administrator with the required privilege can issue with the following command:
DROP TABLE Student;
This is distinct from DELETE statement which is used to delete individual row or set of rows.
