Passed Exam Today 200-901

The diff command is used to compare the contents of two files and display the differences. The -u option stands for "unified" and shows the differences in a unified format, which includes the lines that differ between the two files along with a few lines of context.

When running the command diff -u file1.txt file2.txt, it compares the two files and shows the differences between them.

References:

GNU Diffutils: Unified Format

A code review process involves evaluating and examining another developer's code to identify potential issues, bugs, and improvements before the code is merged into the main codebase. It helps in maintaining code quality and catching errors early in the development cycle.

Error Detection: Code reviews help detect and eliminate common mistakes and bugs that developers might overlook.

Knowledge Sharing: They promote knowledge sharing and learning among team members.

Code Quality: Ensures that the code adheres to the coding standards and best practices.

Option D is correct as the primary benefit of code reviews is to eliminate common mistakes during development.

The subnet mask is used to determine the network and host portions of an IP address. It helps in defining the size of the subnet and the range of IP addresses within that subnet.

Subnet Portion: The subnet mask identifies which part of the IP address refers to the network (subnet) portion.

Host Portion: The remaining part of the IP address after applying the subnet mask identifies the specific host within the subnet.

Options A and D are correct as they capture the details about the subnet and host portions of an IP address.

The Ansible playbook in the exhibit consists of two stages:

Stage 1: Restarts the network service on the eth0 interface.

Stage 2: Starts the httpd service.

Stage 1:

- name: stage1

ansible.builtin.service:

name: network

state: restarted

args: eth0

This stage ensures that the network service on the eth0 interface is restarted.

Stage 2:

- name: stage2

ansible.builtin.service:

name: httpd

state: started

This stage ensures that the httpd service is started if it is not already running.

References:

Ansible Playbook Documentation: Ansible Service Module