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The Python and SQL online test assesses candidates' knowledge of programming in the Python language as well as the ability to use SQL.
It's an ideal test for pre-employment screening. A good Python developer needs to not only solve problems using Python but also write and analyze SQL queries used for communication with the database.
This online test requires candidates to solve coding problems in Python and to write SQL queries that extract, combine, and manipulate data.
A university's Office of Admission keeps track of student majors. Each student can have a single major. Below is an example of how their system stores students, majors, and how it manipulates them:
students = [("Allen Anderson", "Computer Science"),
("Edgar Einstein", "Engineering"),
("Farrah Finn", "Fine Arts")]
def add_new_student(students, name, major):
students.append((name, major))
def update_student(students, index, name, major):
students[index] = (name, major)
def find_students_by_name(students, name):
return [student for student in students if name in student[0]]
def get_all_majors(students):
return [student[1] for student in students]
What can be concluded from the code snippet above?
Given the following data definition, write a query that returns the number of students whose first name is John.
TABLE students id INTEGER PRIMARY KEY, firstName VARCHAR(30) NOT NULL, lastName VARCHAR(30) NOT NULL
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