American Express Devops Engineer Interview Questions and Answers

3 ques at time in coding round with mid level difficulty

Q1. 2 coding questions on dsa
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Q1. Manager interview
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Q1. Explain ingress
Ans. 
Ingress is a Kubernetes resource that manages external access to services within a cluster.
• Ingress allows you to route external HTTP and HTTPS traffic to services based on defined rules.

• It acts as a layer 7 load balancer for routing traffic to different services within the cluster.

• Ingress controllers like Nginx or Traefik are used to implement and manage Ingress resources.

• TLS termination, path-based routing, and host-b...read more
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Q2. How do you reduce docker image size
Ans. 
To reduce docker image size, remove unnecessary files, use multi-stage builds, minimize layers, and use smaller base images.
• Remove unnecessary files and dependencies

• Utilize multi-stage builds to separate build dependencies from runtime dependencies

• Minimize the number of layers in the Dockerfile

• Use smaller base images like Alpine instead of larger ones like Ubuntu
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Q1. What is a Java and how many types are there
Ans. 
Java is a high-level programming language used for developing applications. There are four types of Java: Java SE, Java EE, Java ME, and JavaFX.
• Java is an object-oriented language.

• Java SE (Standard Edition) is used for general-purpose development.

• Java EE (Enterprise Edition) is used for developing enterprise applications.

• Java ME (Micro Edition) is used for developing applications for small devices.

• JavaFX is used for cr...read more
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Q2. Tell the permitted Java type
Ans. 
The permitted Java types include primitive types (int, double, boolean, etc.) and reference types (String, Object, etc.)
• Primitive types are predefined in Java and start with a lowercase letter (e.g., int, double)

• Reference types are created using classes, interfaces, or arrays (e.g., String, Object, int[])

• Java also supports autoboxing, which allows primitive types to be used as reference types (e.g., Integer, Double)
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Q3. Tell the Java coding
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Java is a popular programming language used for developing web applications and software.
• Java is an object-oriented language

• It is platform-independent

• Java code is compiled into bytecode

• Java has a vast library of pre-built classes and methods

• Java is used for developing Android apps
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Q1. Basic Azure questions, CI /Cd details
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Q1. Behavioral questions
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Q1. Where do you see yourself in 5 years?
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Q2. Why should we hire you?
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Q3. What are your salary expectations?
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Q4. What is your family background?
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Q1. Write ansible to copy files from machine to another
Ans. 
Use Ansible playbook to copy files from one machine to another
• Create an Ansible playbook with tasks to copy files

• Use the 'copy' module in Ansible to copy files

• Specify source and destination paths in the playbook

• Run the playbook using 'ansible-playbook' command
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Q1. Devops basics questions
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Q2. Terraform, projects you have worked in previous organisation, middleware ( as they have mostly legacy systems)
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Q3. Basic shell sxripting related questions
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