Docker has revolutionized the software development and deployment process by introducing containers that provide consistency, efficiency, and scalability. Mastering Docker is essential for developers, DevOps engineers, and software architects who wish to excel in their careers.
These Multiple-choice Questions (MCQs) cover frequently asked questions in technical interviews and provide clarity on key concepts. Practicing these questions will build your confidence and help you answer Docker-related questions with ease.
1.) In which year was Docker initially released?
A) 2011
B) 2013
C) 2015
D) 2017
2.) Who is the founder of Docker?
A) Solomon Hykes
B) Brendan Burns
C) Kelsey Hightower
D) Linus Torvalds
3.) What was Docker originally called during its development?
A) Container Engine
B) dotContainer
C) dotCloud
D) The Docker Project
4.) What is the primary technology that Docker builds upon?
A) Hypervisors
B) Linux kernel features like namespaces and cgroups
C) Virtual machine emulation
D) Hardware virtualization
5.) What was the primary reason for developing Docker?
A) To improve hardware virtualization
B) To create a new programming language
C) To replace virtual machines entirely
D) To simplify software deployment and ensure consistency across environments
6.) What is a Docker container?
A) A physical server for running applications
B) A lightweight, standalone executable package for software
C) A virtual machine for hosting databases
D) A tool for monitoring application performance
7.) What is the primary difference between Docker and virtual machines?
A) Docker uses hypervisors; VMs do not.
B) VMs are lightweight, while Docker containers are not.
C) Docker containers share the host OS, while VMs include a full OS.
D) Docker supports only Linux, while VMs support all OS types.
8.) What does a Docker image contain?
A) Only the application code
B) The application, its dependencies, and configuration
C) The runtime environment but not the code
D) Only configuration files
9.) Which file format is used to define a Docker image?
A) YAML
B) JSON
C) Dockerfile
D) XML
10.) What is the main advantage of Docker?
A) Faster development cycles
B) Improved debugging tools
C) Better database management
D) Enhanced hardware performance
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