How should I practice Student and Course Enrollment?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Wells Fargo online assessment problems in FastPrep.

Is Student and Course Enrollment associated with Wells Fargo?

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Student and Course Enrollment

Wells Fargo● EasyINTERNOA

Problem statement

Source note: The report says: "It was more like a simple OOPS question but I had to write the code in an IDE. I had to implement a Students and Course class with basic functions such as get_students, get_courses, disenroll, etc."

The report does not give the full method list, the return order, or the rules for repeat calls and names. Here, the methods are enroll, disenroll, get_students, and get_courses. Lists come back in enrollment order, and a student who leaves and joins again moves to the end of both lists. Enrolling a student already in the course, or disenrolling one who is not in it, does nothing. Student and course names are separate, and a name with no enrollments gives an empty list. You get the calls as a list of operation strings instead of a class.

The judged task matches the report at about 70%.

Special thanks: 🌷 A special thank you to a lovely, amazing fren for sharing that this question appeared again on November 1, 2026! ദ്ദി ˉ͈̀꒳ˉ͈́ )✧ 🧡

Build a small enrollment system with students and courses. You get the calls as a list of operation strings, in order:

"enroll student course" adds the student to the course. If the student is already in the course, nothing changes.
"disenroll student course" removes the student from the course. If the student is not in the course, nothing changes.
"get_students course" returns the names of the students now in the course, in the order they enrolled.
"get_courses student" returns the names of the courses the student is now in, in the order the student enrolled in them.

A student who disenrolls and later enrolls again counts as a new enrollment, so the student and the course each move to the end of the other's list.

A name with no current enrollments returns an empty list. Student names and course names are separate, so a student and a course can have the same name without affecting each other.

Return one row for each get_students or get_courses operation, in the order those operations appear. You can use any classes you like, such as Student and Course.

Function

runEnrollment(operations: String[]) → String[][]

Examples

Example 1

operations = ["enroll ana math","enroll ben math","enroll ana art","get_students math","get_courses ana","disenroll ana math","get_students math","get_courses ana"]return = [["ana","ben"],["math","art"],["ben"],["art"]]

ana and ben join math, and ana also joins art.

get_students for math returns ana then ben, the order they enrolled.
get_courses for ana returns math then art.
After ana leaves math, the course has only ben, and ana has only art.

Example 2

operations = ["enroll ana math","enroll ben math","enroll ana math","get_students math","disenroll cara math","disenroll ana art","get_students math","disenroll ana math","enroll ana math","get_students math"]return = [["ana","ben"],["ana","ben"],["ben","ana"]]

The second enroll of ana in math changes nothing, so the first result is ana then ben.
cara is not in math and ana is not in art, so neither disenroll changes anything. The second result is the same as the first.
ana then leaves and enrolls again, which moves ana to the end. The third result is ben then ana.

Example 3

operations = ["get_students math","enroll math art","get_students math","get_courses math","get_students art","disenroll math art","get_courses math"]return = [[],[],["art"],["math"],[]]

No one has enrolled yet, so the first get_students returns an empty row.
Next, a student named math joins the course art. There is still no course named math with students, so get_students for math is empty.
get_courses for the student math returns art, and get_students for art returns math.
After the student leaves, get_courses for math is empty again.

Constraints

1 <= operations.length <= 1000
Every operation is exactly "enroll student course", "disenroll student course", "get_students course", or "get_courses student", with single spaces between the parts.
Every student and course name has 1 to 10 characters, and each character is a lowercase English letter or a digit.
At least one operation is get_students or get_courses.
All returned rows together hold at most 2000 names.