Redhat Interview Questions (11+ Questions)

Log rotation has stopped working and we suspect VAR log might be mounted on a different file system with limited space or incorrect mount options. Find out information about mounting and write that debug information into this file. We need to give file system type, size, usage, mount point and device name. Start with using DF command, which will give us information about file system. This is a human readable format by typing DF hyphen H. EXT four is most common on Linux. It's stable, fast and predictable file system. We also sometimes have XFS, which is more enterprise grade file system used for large systems. Find mnt and then we can provide Target, or we just can type find mnt and it'll give us all the mounted storages on our system.

We have a server with Unmounted partitions, which means that we have a block device but it's not used so we can mount it for additional storage. Our task is asking us to identify those unmounted partitions, the ones that are safe. We need to avoid system critical partitions, mount them, but before that also create a file system. We'll list block devices by LSBLK. Try another command, LSBLK hyphen F to see the file system type for those devices. ISO is read only file system type. We cannot mount to this. File system is formatted drive NTFS XT four or XFS format. It lets us to use this device as a folder, as a file system. The question is asking us to create XT four file system. This is the most common file system for Linux. We'll do that by typing MKFS. It stands for make file system. In Linux, all the block devices are living under slash dev. Next we need to create a folder where we'll mount our file system. Finally, mount our file system. Verify that file system was mounted correctly by typing DF command.

Master how to enhance a Linux Bash script for periodic monitoring that records the five most recently started process start times without duplicates. This guide includes appending new data safely in a cron-executed script, useful for tracking system behaviors and diagnosing intermittent failures in production environments.

We have a background data processing job that started by user DevOps and is consuming too much CPU and slowing down user facing services. We're going to lower its priority by reducing its CPU scheduling priority to critical user facing services. Our task says reduce the process priority to 10 while keeping it running so we cannot shut down the service itself. First we identify the process ID by using ps aux. Once we have the process id, we check its current nice value by typing ps and output stat ni. We will change the nice value to reduce its CPU impact. We will increase the nice value to 10. Type renice 10 and then the process ID.

Safely undo bad commits that have been pushed to shared repositories using git revert. Create new commits that invert problematic changes, maintain complete commit history for audit trails, prevent breaking other developers' work, and enable safe collaboration on main branches. Essential for production hotfixes, team workflows, maintaining history integrity, and following Git best practices for shared repositories.

We have a cron job named cleanup in ops namespace that is failing to trigger and we suspect incorrect schedule that relies on default time zone. It also retains too many completed jobs. Task is to clean up cron job so that validation confirms it triggers exactly once per minute. The time zone should be UTC. First we'll get the YAML manifest of the cron job named cleanup. Edit this cron job, we'll use kubectl edit command for this. We need to update this schedule. The second thing is we need to add time zone. We've been told that we need only most recent successful run to be retained. We've got successful job history limit set to three, so we need to update this to one.

Kubernetes ClusterIP Service: Expose nginx-pod as nginx-svc on Port 80. Learn how to create a ClusterIP service to expose your running nginx-pod across the Kubernetes cluster. This task demonstrates setting up nginx-svc service on port 80 to provide stable networking for internal cluster applications, enabling pod discovery, load balancing, and service-based communication. Perfect for Kubernetes networking basics, internal service discovery, microservices architecture, and preparing for Ingress and LoadBalancer services.

Generating a Detailed Customer Order Report in SQL

The given objective of this interview question is to write an SQL query to generate a comprehensive report that lists each order along with specific associated details such as order date, customer ID, customer name, and customer type, which ind...

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Objective

Given two tables, employees and departments, construct a SQL query to display each department's name, the total number of employees in that department, the aggregate salary of all its employees, and the average salary rounded to two decimal places. The output should be sorted alpha...

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Understanding the SQL Interview Question: Finding Average Order Amounts for High-Value Orders by Category

Objective

In this SQL interview question, you are tasked with writing a query to find the average order amount for high-value orders (defined as orders with an amount greater than 1000...

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Objective:

As part of your SQL interview preparation, one crucial skill is the ability to write complex queries that amalgamate data from multiple tables. A common interview question is to identify customers with multiple non-returned orders. Here’s how you can achieve this using SQL:

SQL ...

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