Answer: False
Explanation:
This means that the mappings between the two schemas may be specified in either one of these languages.In most relational DBMSs today, there is no specific language that performs the role of SDL. Instead, the internal schema is specified by a combination of functions, parameters, and specifications related to storage. These permit the DBA staff to control indexing choices and mapping of data to storage
Answer:
Input example:
select the funcion: 1
write the 1sd number2
write the 2nd number1
value is 2.000000
Explanation:
#include <stdio.h>
main()
{
//define the variables as float
float a, b, c, e;
char d;
while (1)
{
//input values
printf("select the function: ");
scanf("%c",&d);
printf("write the 1sd number");
scanf("%f",&a);
getchar();
printf("write the 2nd number");
scanf("%f",&b);
getchar();
if (d=='%')
{
a=a*b/100;
}
if (d=='*')
{
a=a*b;
}
if (d=='+')
{
a=a+b;
}
if (d=='/')
{
a=a/b;
}
if (d=='-')
{
a=a-b;
}
printf("value is %f \n",a);
}
printf("final value is %f",a);
getchar();
}
Answer:
C) 1 4 2 / + 1 + 2 + 3 * 2 /
Explanation:
Infix, Postfix and Prefix are 3 different ways of writing expressions which differ in relative placement of operator and operands.
In Infix , operator lies between the operands whereas in postfix operator is written after its operands.
For example: 1 + 2 is infix while 1 2 + is the corresponding postfix expression.
Converting the given infix expression (1 + 4 / 2 + 1 + 2) * 3 / 2 to postfix:
Let (1 + 4 / 2 + 1 + 2) be represented by x.
Converting x to postfix:
(1 + 4 / 2 + 1 + 2) => 1 4 2 / + 1 + 2 + ------------------------- (1)
So the overall infix expression becomes:
x * 3 / 2
Converting it to postfix:
x 3 * 2 /
Replacing the value of x from (1)
1 4 2 / + 1 + 2 + 3 * 2 /
You see, you just aren’t philosophical enough to understand an email. You don’t change the email, it changes you.
At the two opposite direction or angle should he take the photo and Henry should shoot at an angle of 180 degrees.
<h3>What is two point lighting photography?</h3>
The two point light principle is known to be one that is itself along with the subject as they are lit from two different directions with the light sources and are said to be 180 degrees apart.
Therefore, At the two opposite direction or angle should he take the photo and Henry should shoot at an angle of 180 degrees.
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