Cognizant Senior Infra Developer Interview Questions, Process, and Tips

Q1. Program to reverse string (java for me)
Ans. 
Program to reverse a string in Java
• Create a StringBuilder object

• Use the reverse() method of StringBuilder to reverse the string

• Convert the StringBuilder object back to a string using toString() method
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Q2. Difference between sql and plsql
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SQL is a language used to manage relational databases, while PL/SQL is a procedural language used to extend SQL functionality.
• SQL is used to manage and manipulate data in relational databases.

• PL/SQL is used to create stored procedures, functions, and triggers in Oracle databases.

• SQL is a declarative language, while PL/SQL is a procedural language.

• SQL is used to retrieve and manipulate data, while PL/SQL is used to crea...read more
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Q3. Steps to track down issues from web services
Ans. 
To track down issues from web services, follow these steps.
• Check server logs for errors

• Use tools like Postman to test API endpoints

• Check network connectivity and firewall settings

• Monitor server performance and resource usage

• Collaborate with developers and stakeholders to identify and resolve issues
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Q4. Different types of class loaders
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Class loaders are responsible for loading classes into the JVM. There are different types of class loaders.
• Bootstrap class loader - loads classes from the JDK's rt.jar file

• Extension class loader - loads classes from the JDK's extension directory

• System class loader - loads classes from the classpath

• Custom class loader - created by the developer to load classes from a specific location or source

• Class loaders follow a del...read more
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Q5. Features of OOPS , details of polymorphism overloading, overriding
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OOPS features and details of polymorphism overloading and overriding
• OOPS features include encapsulation, inheritance, and polymorphism

• Polymorphism allows objects to take on multiple forms

• Overloading is having multiple methods with the same name but different parameters

• Overriding is when a subclass provides its own implementation of a method from the superclass

• Example of polymorphism: a shape class with different subcla...read more
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Q6. JavaScript overview, jsp servlets difference, variable declaration, scope
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Q1. Discussion on cloud based technology and conventional approach
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Q2. Overview of service now and its future
Ans. 
ServiceNow is a cloud-based platform that provides IT service management, IT operations management, and IT business management solutions.
• ServiceNow is used by organizations to manage IT services and operations.

• It offers a range of modules including incident management, change management, problem management, and asset management.

• ServiceNow is expanding its offerings to include HR service management, customer service man...read more
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Q1. Discussion about experience and preferred location
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Q2. Expected CTC ,designation and salary breakup
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Q1. Basic technical questions
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Q1. Moderate scenerios.
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Q1. Managerial round
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Interviewer gave me a senario and ask me to do it using scripting

Q1. This was less technical and more of Q&A
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Q1. Negotiations of package
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Q1. Tell me about CI/CD pricess
Ans. 
CI/CD process is a software development practice that involves continuous integration, continuous delivery, and continuous deployment.
• CI/CD stands for Continuous Integration/Continuous Delivery.

• It involves automating the process of integrating code changes into a shared repository and then deploying them to production.

• CI/CD helps in reducing manual errors, improving code quality, and increasing the speed of software de...read more
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Q2. Tell about ansible automation
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Ansible is an open-source automation tool used for configuration management, application deployment, and orchestration.
• Ansible uses YAML syntax for writing playbooks which define tasks to be executed on remote hosts.

• It connects to remote hosts via SSH and does not require any agent to be installed on the target machines.

• Ansible allows for idempotent execution, meaning running the same playbook multiple times will resul...read more
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Q3. Tell about image creation
Ans. 
Image creation involves building a virtual representation of an operating system or application.
• Images can be created using tools like Dockerfile or Packer.

• Images can be customized with specific configurations and dependencies.

• Images can be stored in registries like Docker Hub or AWS ECR.

• Images can be used to create containers for running applications.
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Q1. Tell about existing project
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Q2. Tell about kubernetes cluster management
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Kubernetes cluster management involves deploying, scaling, and managing containerized applications.
• Automates deployment, scaling, and management of containerized applications

• Provides self-healing capabilities for applications

• Supports rolling updates for seamless application upgrades

• Allows for efficient resource utilization through scheduling and load balancing

• Facilitates monitoring and logging of applications for bette
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