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Students can enroll in multiple courses, and each course can have multiple students. When converting this relationship into a relational schema, how should it be represented?
Consider the following Orders table:
Table: A
id |
1 |
2 |
Table: B
id |
2 |
3 |
And the SQL query:
<SQL>
SELECT A.id FROM AINNER JOIN BON A.id = B.id;
What is the output of this query?
A developer wants to run code when the user clicks a button with id="go". Which line does this correctly?
Which of the following is the correct way to write a single-line comment in JavaScript?
Consider the following SQL query:
<SQL>
SELECT dept, COUNT(*) FROM Employee GROUP BY dept HAVING COUNT(*) > 5;
What does the following SQL query return?
The following PHP call fails to establish a database connection. Which of the listed options is the most common cause of this failure?
PHP
$conn = mysqli_connect("localhost", "root", "", "db");
A company wants to increase the salary by 10% only for employees earning less than 3000. Consider the following SQL query:
<SQL>
UPDATE EmployeeSET Salary = Salary * 1.1;
What is the issue with this query?
In the element below, what is the primary purpose of the alt attribute?
<img src="image.jpg" alt="">
How do you write an "if" statement in JavaScript to run code when x is greater than 10?
Consider the following SQL query:
<SQL>
SELECT nameFROM StudentWHERE name LIKE 'A%_';
What does the following SQL query return?