30+ Columbia Asia Interview Questions and Answers

This program reverses a sentence by splitting it into words and then reversing the order of the words.

• Split the sentence into an array of words using a space as the delimiter

• Create an empty array to store the reversed words

• Iterate through the array of words in reverse order and add each word to the new array

• Join the reversed words array into a single string using a space as the delimiter

The flexibility and power of Unix's command line interface.

• Unix's command line interface allows for efficient and precise control over the system.

• It provides a wide range of powerful and versatile command line tools.

• The ability to chain commands together using pipes and redirection enhances productivity.

• Unix's command line interface is scriptable, enabling automation and batch processing.

• It allows for easy customization and personalization through shell scripting and configur...read more

Telecom background involves designing, implementing and maintaining communication networks.

• Designing and implementing communication networks

• Maintaining and upgrading existing networks

• Ensuring network security and reliability

• Managing network resources and optimizing performance

• Providing technical support to customers

• Examples: 4G/5G networks, fiber optic cables, satellite communication systems

A demo is presented in Agile methodology during the sprint review meeting.

• A demo is typically presented at the end of each sprint in Agile methodology.

• It showcases the completed user stories and features developed during the sprint.

• The demo allows stakeholders to provide feedback and validate the work done.

• It helps in identifying any gaps or areas for improvement in the software.

• The demo should be interactive and engaging to effectively communicate the functionality.

• The demo ...read more

A C program that needs to be written and explained line by line.

• The program should be written in C language.

• Each line of the program needs to be explained.

• The program should use an array of strings.

• The answer should be returned in JSON format.

I use tools such as MadCap Flare, Adobe FrameMaker, and Microsoft Word to create documentation.

• MadCap Flare

• Adobe FrameMaker

• Microsoft Word

Agile is better than Waterfall model due to its flexibility, adaptability, and customer collaboration.

• Agile allows for iterative development and frequent feedback, leading to faster delivery of working software.

• Agile promotes flexibility and adaptability, allowing for changes in requirements and priorities throughout the development process.

• Agile encourages close collaboration between the development team and the customer, ensuring that the final product meets their needs and...read more

To find the second highest salary in a table, use the SQL query with the MAX function and a subquery.

• Use the MAX function to find the highest salary in the table

• Use a subquery to exclude the highest salary and find the maximum of the remaining salaries

• Combine the two queries to get the second highest salary

Yes, I have used logging extensively in my projects to track application behavior and troubleshoot issues.

• Used logging frameworks like Log4j or SLF4J to log information, warnings, and errors

• Configured log levels to control the amount of detail in logs

• Logged important events, exceptions, and user actions for debugging purposes

• Stored logs in files or databases for future reference

I have experience in various types of testing, knowledge of Linux, automation experience, and domain knowledge.

• Worked on UI testing for web applications using Selenium

• Performed component testing for API endpoints using Postman

• Familiar with testing on Linux platforms

• Experience in automation testing using tools like Jenkins and JUnit

• Domain knowledge in e-commerce and retail industries

Web API and WCF have different use cases and technologies, each with its own strengths and weaknesses.

• Web API is more lightweight and suitable for building RESTful services, while WCF is more heavyweight and supports various communication protocols.

• Web API is easier to use for building HTTP services, while WCF offers more flexibility and features for building distributed applications.

• Web API is preferred for modern web development, while WCF is more commonly used in enterpris...read more

Agile is a methodology that emphasizes flexibility and collaboration. Scrum is a framework for implementing Agile.

• Agile focuses on delivering value to the customer through iterative and incremental development.

• Scrum is a framework for implementing Agile that includes roles (Product Owner, Scrum Master, Development Team), events (Sprint, Daily Scrum, Sprint Review, Sprint Retrospective), and artifacts (Product Backlog, Sprint Backlog, Increment).

• Scrum emphasizes transparency, ...read more

OOPs concepts are fundamental principles of Object-Oriented Programming that help in designing and implementing software solutions.

• Encapsulation: Bundling data and methods together in a class to hide implementation details.

• Inheritance: Creating new classes by inheriting properties and behaviors from existing classes.

• Polymorphism: Ability of objects to take on many forms and perform different actions based on the context.

• Abstraction: Simplifying complex systems by breaking the...read more

Waterfall model is a linear, sequential approach to software development, while Agile model is an iterative, flexible approach.

• Waterfall model follows a sequential process, where each phase is completed before moving to the next one.

• Agile model emphasizes collaboration, adaptability, and continuous improvement.

• Waterfall model is suitable for projects with well-defined requirements and stable scope.

• Agile model is ideal for projects with evolving requirements and a need for fre...read more

Scrum ceremonies are regular meetings that provide structure to the Scrum framework.

• There are four Scrum ceremonies: Sprint Planning, Daily Scrum, Sprint Review, and Sprint Retrospective.

• Sprint Planning is held at the beginning of each sprint to plan the work to be done.

• Daily Scrum is a daily meeting where the team discusses progress and plans for the day.

• Sprint Review is held at the end of each sprint to review the work completed and get feedback from stakeholders.

• Sprint Ret...read more

Constraints in SQL are rules and restrictions that are applied to columns in a table to ensure data integrity and consistency.

• Constraints ensure data accuracy and consistency in a database

• Common constraints include NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, CHECK, and DEFAULT

• NOT NULL constraint ensures a column cannot have a NULL value

• UNIQUE constraint ensures all values in a column are unique

• PRIMARY KEY constraint uniquely identifies each record in a table

• FOREIGN KEY constr...read more

Conflicts in Git are resolved by merging changes, rebasing, or using tools like Git GUI or GitKraken.

• Merge conflicting branches using 'git merge' command

• Rebase conflicting branches using 'git rebase' command

• Use tools like Git GUI or GitKraken to visually resolve conflicts

• Manually edit files to resolve conflicts

• Use 'git status' and 'git diff' to identify conflicting files

Agile methodologies are iterative and incremental approaches to software development that prioritize customer satisfaction and adaptability.

• Agile methodologies prioritize individuals and interactions over processes and tools

• They emphasize working software over comprehensive documentation

• They value customer collaboration over contract negotiation

• They respond to change rather than following a plan

• Examples include Scrum, Kanban, and Extreme Programming (XP)

End to end CDR rating flow is the process of rating and billing for call detail records.

• CDRs are collected from network elements and processed by a mediation system.

• The mediation system transforms the CDRs into a format that can be rated.

• The rating engine applies pricing rules to the CDRs to determine the cost of the call.

• The rated CDRs are then sent to a billing system for invoicing and revenue assurance.

• The billing system generates bills and reports for customers and intern...read more

My daily process involves researching, writing, editing, and collaborating with subject matter experts.

• Start the day by reviewing any new project requirements or updates

• Research technical information and gather necessary resources

• Write and edit technical documentation, ensuring accuracy and clarity

• Collaborate with subject matter experts to verify information and gather feedback

• Attend meetings or training sessions related to ongoing projects

WCF (Windows Communication Foundation) life cycle involves creation, opening, closing, and disposing of communication objects.

• Creation: Communication objects are created using constructors.

• Opening: Objects are opened to establish communication channels.

• Closing: Communication channels are closed after use.

• Disposing: Objects are disposed to release resources.

• Example: Creating a WCF service involves defining service contracts, implementing service behaviors, hosting the service,...read more

Core elements of WCF include contracts, services, messages, and endpoints.

• Contracts define what the service does and how clients can interact with it

• Services implement the functionality defined in contracts

• Messages are the data exchanged between clients and services

• Endpoints define the address, binding, and contract for a service

OOPs concept is a programming paradigm that focuses on objects and classes to organize code and promote reusability.

• OOPs stands for Object-Oriented Programming

• It involves concepts like inheritance, encapsulation, polymorphism, and abstraction

• Classes are blueprints for objects, which have attributes and methods

• Objects are instances of classes that can interact with each other

• Example: A project using OOPs may have classes like 'Employee' with attributes like 'name' and 'salary'

Cucumber is a testing framework that supports Behavior Driven Development (BDD) by allowing tests to be written in plain language.

• Cucumber uses Gherkin syntax to define test cases in a human-readable format

• It allows collaboration between technical and non-technical team members

• Cucumber integrates with various programming languages like Java, Ruby, etc.

• It promotes reusability of code through feature files and step definitions

SQL views are virtual tables that display data from one or more tables based on a predefined query.

• SQL views are saved queries that can be used to simplify complex queries.

• They can be used to hide the complexity of underlying tables from users.

• Views can also be used to restrict access to certain columns or rows of a table.

• Changes made to the underlying tables are reflected in the views.

• Example: CREATE VIEW vw_employee AS SELECT emp_id, emp_name FROM employees;

Unix structure refers to the hierarchical organization of files and directories in a Unix-based operating system.

• Unix structure is based on a tree-like hierarchy of directories and files

• The root directory is denoted by a forward slash (/)

• Directories can contain subdirectories and files

• Files can be executable, readable, and/or writable

• Unix uses a command-line interface to navigate and manipulate the file system

SQL structure refers to the organization and design of tables, columns, and relationships in a database.

• SQL structure includes creating tables, defining columns and data types, and establishing relationships between tables.

• Primary keys and foreign keys are used to enforce data integrity and ensure accurate relationships between tables.

• Normalization is an important concept in SQL structure, which involves organizing data into separate tables to reduce redundancy and improve ef...read more

I coded last time yesterday to develop a web application.

• Developed a web application using HTML, CSS, and JavaScript

• Implemented user authentication and authorization using a Node.js framework

• Integrated a PostgreSQL database to store and retrieve data

• Used Git for version control and collaborated with a team on GitHub

I have implemented various web applications using technologies like HTML, CSS, JavaScript, and React.

• Developed a responsive website for a local business using HTML, CSS, and JavaScript

• Created a single-page application using React for a personal project

• Integrated APIs to fetch and display data dynamically on web pages

The flow of end to end order in BSS involves customer placing an order, order processing, billing, and fulfillment.

• Customer places an order through the BSS system.

• Order is processed by validating customer information, checking inventory, and generating a purchase order.

• Billing is done by generating an invoice and processing payment.

• Fulfillment involves picking, packing, and shipping the order to the customer.

• Order status updates are sent to the customer throughout the process...read more