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3 years ago

Write a program. in QBAsSIC

Computers and Technology

1 answer:

goblinko [34]3 years ago

5 0

Answer:

The program is as follows:

5 INPUT A,B

6 PROD = A * B

7 PRINT PROD

8 TOTAL = A + B

9 PRINT TOTAL

10 DIFF = A - B

11 PRINT DIFF

12 END

Explanation:

This gets input for the two numbers

5 INPUT A,B

This calculates the product

6 PROD = A * B

This prints the calculated product

7 PRINT PROD

This calculates the sum

8 TOTAL = A + B

This prints the calculated sum

9 PRINT TOTAL

This calculates the difference

10 DIFF = A - B

This prints the calculated difference

11 PRINT DIFF

This ends the program

12 END

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3 years ago

6.25 (Prime Numbers) A positive integer is prime if it’s divisible by only 1 and itself. For example, 2, 3, 5 and 7 are prime, b

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Answer:

public class Main {
public static void main (String [] args) {
for(int i = 2; i < 10000; i++){
if(isPrime1(i)){
System.out.print(i + " ");
}
}
System.out.println();
for(int i = 2; i < 10000; i++){
if(isPrime2(i)){
System.out.print(i + " ");
}
}
}
public static boolean isPrime1(int n){
for(int i=2; i <= n/2; i++){
if(n % i == 0){
return false;
}
}
return true;
}
public static boolean isPrime2(int n){
for(int i=2; i <= Math.sqrt(n); i++){
if(n % i == 0){
return false;
}
}
return true;
}
}

Explanation:

Firstly, create the first version of method to identify a prime number, isPrime1. This version set the limit of the for loop as n/2. The for loop will iterate through the number from 2 till input n / 2 and check if n is divisible by current value of i. If so, return false to show this is not a prime number (Line 22 - 26). Otherwise it return true to indicate this is a prime number.

In the main program, we call the isPrime1 method by passing the i-index value as an argument within a for-loop that will iterate through the number 2 - 10000 (exclusive). If the method return true, print the current i value). (Line 5 - 9)

The most direct way to ensure all the prime numbers below 10000 are found, is to check the prime status from number 2 - 9999 which is amount to 9998 of numbers.

Next we create a second version of method to check prime, isPrime2 (Line 31 - 40). This version differs from the first version by only changing the for loop condition to i <= square root of n (Line 33). In the main program, we create another for loop and repeatedly call the second version of method (Line 13 - 17). We also get the same output as in the previous version.

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Explain the working system of computer systems with examples

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3 years ago

Write a SQL query to find the population of the planet named 'Caprica' -- 10 points Find the first name, last name, and age of p

Artemon [7]

The question is incomplete! Complete question along with answer and step by step explanation is provided below.

Please find the attached question.

Answer:

a) SQL Query:

SELECT population

FROM bsg_planets

WHERE name='Caprica';

b) SQL Query:

SELECT fname, lname, age

FROM bsg_people

WHERE lname!='Adama';

c) SQL Query:

SELECT name, population

FROM bsg_planets

WHERE population > 2600000000

d) SQL Query:

SELECT fname, lname, age

FROM bsg_people

WHERE age IS NULL;

Explanation:

a) Write a SQL query to find the population of the planet named 'Caprica'

Syntax:

SELECT Column

FROM TableName

WHERE Condition;

For the given case,

Column = population

TableName = bsg_planets

Condition = name='Caprica'

SQL Query:

SELECT population

FROM bsg_planets

WHERE name='Caprica';

Therefore, the above SQL query finds the population of the planet named 'Caprica' from the table bsg_planets.

b) Find the first name, last name, and age of people from bsg_people whose last name is not 'Adama'

Syntax:

SELECT Column1, Column2, Column3

FROM TableName

WHERE Condition;

For the given case,

Column1 = fname

Column2 = lname

Column3 = age

TableName = bsg_people

Condition = lname!='Adama'

SQL Query:

SELECT fname, lname, age

FROM bsg_people

WHERE lname!='Adama';

Therefore, the above SQL query finds the first name, last name and age of people whose last name is not 'Adama' from the table bsg_people.

c) Find the name and population of the planets with a population larger than 2,600,000,000

Syntax:

SELECT Column1, Column2

FROM TableName

WHERE Condition;

For the given case,

Column1 = name

Column2 = population

TableName = bsg_planets

Condition = population > 2600000000

SQL Query:

SELECT name, population

FROM bsg_planets

WHERE population > 2600000000

Therefore, the above SQL query finds the name and population of the planets with a population larger than 2,600,000,000 from the table bsg_planets.

d) Find the first name, last name, and age of people from bsg_people whose age is NULL

Syntax:

SELECT Column1, Column2, Column3

FROM TableName

WHERE Condition;

For the given case,

Column1 = fname

Column2 = lname

Column3 = age

TableName = bsg_people

Condition = age IS NULL

SQL Query:

SELECT fname, lname, age

FROM bsg_people

WHERE age IS NULL;

Therefore, the above SQL query finds the first name, last name and age of people whose age is NULL from the table bsg_people.

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4 years ago

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