How do I approach Coding & Algorithms interview questions?

Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

What difficulty level is this interview question?

This is a Medium difficulty Coding & Algorithms question, commonly asked during Onsite rounds at Capital One.

What role is this question designed for?

This question is commonly asked for Data Scientist candidates at Capital One during technical interviews.

Critique Shell Script for Credit-Card Program Tech Round

Last updated: Mar 29, 2026

Quick Overview

This question evaluates understanding of shell scripting and system-level behaviors, focusing on file execution, permissions, variable usage, pipes, exit codes, and potential side effects through a line-by-line critique of a short script.

Medium
Capital One
Coding & Algorithms
Data Scientist

Capital One

Aug 4, 2025, 10:55 AM

Data Scientist

Onsite

Coding & Algorithms

Scenario

Tech round for a new credit-card program: candidate is shown a 5-6 line shell script and asked to critique it

Question

What kind of file is "xxx.sh" and how is it executed?

Line-by-line, explain what each command in the provided shell script does.

Hints

Comment on shebang, permissions, variables, pipes, exit codes, and any side-effects.

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