certifications

Certified Kubernetes Administrator Sample Test on Services Concept

This page represents practice test consisting of questions and answers on Kubernetes. This practice test covers the topic such as Kubernetes Services. The practice test can prove to be very helpful if you are preparing to take Certified Kubernetes Administrator (CKA) certification examination in near future. It covers the Networking Concepts from CKA certification exam syllabus which can comprise of 11% questions in CKA certification exam.

Check out other question sets on this page, Kubernetes Certification Exam (CKA) Sample Questions Sets.


Revision Notes – Kubernetes concepts on Services

  • A Kubernetes service is an abstraction which is used to define a logical set of pods.
  • A Kubernetes service is assigned an IP address.
  • In service spec definition, port refers to incoming port which is mapped to targetPort on Pod. By default, the value of targetPort is set to same value as port.
  • targetPort can be a string, referring to the name of a port in the backend Pods.
  • Kubernetes services support both TCP and UDP for protocols.
  • A service can be defined without a label selector for some of the following reasons:
    • Point to another service in another Namespace.
    • Integrate with backends running outside of Kubernetes
  • A service not defined without a label selector requires one of the following to happen:
    • Define endpoint with an ip address and a port for connecting to external services
    • Define ExternalName service which serves as a way to return an alias to an external service residing outside the cluster.
  • Every node in a Kubernetes cluster runs an instance of kube-proxy and kubelet.
  • Kube-proxy is responsible for implementing a form of Virtual IP for Services.
  • In iptables mode, Kube-proxy installs iptables rules for capturing traffic to the Service’s virtual clusterIP and Port.
  • Kube-proxy running in following modes supports following as load balancing algorithm
Proxy modes Load-balancing algorithm
Userspace Round-robin
Iptables Random
IPVS round-robin, least connection, source / destination hashing, shortest expected delay, never queue
  • Service supports exposing more than one port, say http(80), https(443).


Practice Test – Kubernetes Services

[wp_quiz id=”6143″]

Additional Practice Tests

These are additional practice tests which relates to core concepts part of CKA certification test. Note that as per syllabus, core concepts will cover 19% questions in CKA certification test.


References

Those preparing for interviews in relation to Kubernetes or cloud-native apps would also find these questions to be useful enough. These questions can as well prove to be useful for interns / freshers / beginners getting started with Kubernetes.

Ajitesh Kumar

I have been recently working in the area of Data analytics including Data Science and Machine Learning / Deep Learning. I am also passionate about different technologies including programming languages such as Java/JEE, Javascript, Python, R, Julia, etc, and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data, etc. I would love to connect with you on Linkedin. Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking.

Recent Posts

Agentic Reasoning Design Patterns in AI: Examples

In recent years, artificial intelligence (AI) has evolved to include more sophisticated and capable agents,…

1 month ago

LLMs for Adaptive Learning & Personalized Education

Adaptive learning helps in tailoring learning experiences to fit the unique needs of each student.…

1 month ago

Sparse Mixture of Experts (MoE) Models: Examples

With the increasing demand for more powerful machine learning (ML) systems that can handle diverse…

2 months ago

Anxiety Disorder Detection & Machine Learning Techniques

Anxiety is a common mental health condition that affects millions of people around the world.…

2 months ago

Confounder Features & Machine Learning Models: Examples

In machine learning, confounder features or variables can significantly affect the accuracy and validity of…

2 months ago

Credit Card Fraud Detection & Machine Learning

Last updated: 26 Sept, 2024 Credit card fraud detection is a major concern for credit…

2 months ago