List Unallocated Experiment Buckets

Question

The question asks the candidate to write a function that lists unallocated experiment buckets from a given dataset.

Codemia · Accepted Answer

To solve the problem of listing unallocated experiment buckets, we first need to understand the structure of the input data. We will assume that we have a list of all available buckets and a list of allocated buckets. Our goal is to identify which buckets are not present in the allocated list.

We can use a set to store the allocated buckets for O(1) average time complexity on lookups. The steps are as follows:

1. Convert the list of allocated buckets into a set.
2. Iterate through the list of all available buckets and check if each bucket is in the allocated set.
3. If a bucket is not found in the allocated set, add it to the result list.

Here is a Python implementation:

```python
def list_unallocated_buckets(all_buckets, allocated_buckets):
    allocated_set = set(allocated_buckets)
    unallocated = []
    for bucket in all_buckets:
        if bucket not in allocated_set:
            unallocated.append(bucket)
    return unallocated
```

The time complexity of this algorithm is O(n + m), where n is the number of all buckets and m is the number of allocated buckets. The space complexity is O(m) due to the storage of the allocated set. This is efficient given that we only need to traverse the lists once.

We should consider edge cases such as:
- When the list of all buckets is empty, the function should return an empty list.
- When there are no allocated buckets, the function should return all available buckets.
- When all buckets are allocated, the function should return an empty list.

It is crucial to test the function with various scenarios to ensure its correctness. For example:
- Input: `all_buckets = ['A', 'B', 'C']`, `allocated_buckets = ['A']` should return `['B', 'C']`.
- Input: `all_buckets = []`, `allocated_buckets = []` should return `[]`.

List Unallocated Experiment Buckets

Pinterest

What the Interviewer Expects

Key Topics to Cover

How to Approach This

Possible Follow-up Questions

Sharpen Your Skills on Codemia

Sample Answer

Approach

Algorithm

Submit Your Answer

Pinterest Software Engineer Interview Guide

Related Questions

Binary Search on graph

Count kth largest element in array

Find connected components in string

Merge Three Sorted strings

Binary Search on string