[solved] – Question 71267
Consider a database with relations R(A,B,C), S(D,E), and T(F,G).
(i) Give the initial query plan (constructed as in Lecture 12) for the SQL query
SELECT B, E, G
FROM R, S, T
WHERE A = 10 AND C = D AND E = F AND A > G;
Then use the heuristics from Lecture 16 to transform the initial query plan into an optimised
(logical) query plan. Perform the transformation step-wise, pushing a single operator over a
single operator in each step, and indicate the heuristics you apply.
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[solved] – Question 71299
Which data warehouse architecture is effective for an organization with various business units that generally has unique data needs, and where some data and processes may overlap?
Options:
Hub and Spoke
Centralized Data Warehouse
Department Data Mart
Security
Your answer must explain why or why not each option is or is not appropriate.
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[solved] – Question 71304
Design, implement and test a C++ program that will â
â¢Prompt user for a file name.
â¢Process input file of âtest scoresâ and store them using an array
â¢Determine the lowest, highest, average and total scores
â¢Save the scores (lowest, highest, average and total) to an output file
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[solved] – Question 71341
reade an integer value from the keybord and display a message indicating if this number is odd or even
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[solved] – Question 71355
Of the following statements, which ones can be said to be TRUE?
The time complexity of all single statements is constant
According to the Big O Notation, the time complexity of some statements can be said to be logarithmic
Time complexity can only be expressed by using the Big O notation
Time complexity can be expressed as a differential equation
The time complexity of an algorithm can vary over time
Quadratic time complexity can be expressed as a quadratic equation
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[solved] – Question 71382
Can you imagine a situation in which an autonomous system chooses not to advertise all of its networks? Explain.
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[solved] – Question 71474
create a python program that calculates the total cost of an order including shipping
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[solved] – Question 71503
3. The program developed must be able to read the input files containing matrix A and matrix B
using fopen function
a. Matrix A and B of different size may be stored in different input file (if required).
4. Scan and assign matrix A and B as array using fscanf function and for loop
5. Perform matrix operations
a. Add matrix A and B
b. Subtract matrix A and B
c. Multiply matrix A and B
6. Use conditional statement if or switch for switching between 3, 4 and 5 elements matrix.
7. Print all input matrices and results obtained in a new file called output.dat using fprintf
function.
8. The output.dat file must have a header with the following information:
a. Student name
b. Student matric number
c. Class section
d. Lecturer name
e. Project title
9. Below the header, the output file must contain matrix A and B and the results from matrix
operation.
Use matrix A and B as given below:
Problems #1:
A = [
2 3 4
7 8 9
5 6 8
] ; B = [
3 3 3
3 4 6
8 4 7
]
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[solved] – Question 71513
Hello, someone could help me with this exercise it’s about Reading numbers: Write a program that reads a group of 10 numbers from the
user and place them inside a float type array. Once the numbers are
stored in the array, the program must calculate the average of these numbers and must
print the result on the screen. Use only pointer notation. For this one
exercise, it is forbidden to access the indexes by means of square brackets ([]).
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