Count Completed Jobs in a Serial Single-Worker Pipeline

Question

This question asks the candidate to implement a function that counts the number of completed jobs in a serial single-worker pipeline.

Codemia · Accepted Answer

To solve the problem of counting completed jobs in a serial single-worker pipeline, I will first outline the requirements. We need to track jobs that have been completed and ensure that we only count those that have successfully finished. I will implement a function that iterates through a list of job statuses, incrementing a counter for each completed job.

The algorithm involves iterating through an array of job statuses. For each job, we will check if it is marked as completed. If it is, we will increment our count. Here is a simple Python implementation:

```python
def count_completed_jobs(job_statuses):
    completed_count = 0
    for status in job_statuses:
        if status == 'completed':
            completed_count += 1
    return completed_count
```
This function takes a list of job statuses and returns the total count of completed jobs.

The time complexity of this solution is O(n), where n is the number of jobs in the pipeline. This is because we need to check each job status once. The space complexity is O(1) since we are using a fixed amount of extra space for the counter, regardless of the input size.

While implementing this solution, I considered several edge cases. For example, if the input list is empty, the function should return 0. Additionally, if there are no completed jobs, the function should also return 0. These cases are handled naturally by the current implementation.

Interviewers are looking for clarity in the candidate's thought process, the ability to articulate the solution, and a solid understanding of algorithmic complexity. They also want to see how well the candidate can handle edge cases and whether they can think critically about potential improvements or modifications to the solution.

Count Completed Jobs in a Serial Single-Worker Pipeline

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