40+ Senior Technical Specialist Interview Questions and Answers

A security cheque ensures commitment and mitigates risks associated with hiring candidates.

• Acts as a financial commitment from the candidate, showing seriousness about the position.

• Mitigates risk for the company in case of potential misconduct or breach of trust.

• In industries with sensitive data, it serves as a deterrent against data theft or fraud.

• Example: If a candidate leaves abruptly, the cheque can cover costs incurred during the hiring process.

To resolve a production issue with no clue, follow a systematic troubleshooting approach.

• Start by gathering information about the issue, such as error messages, logs, and user reports.

• Analyze the available data to identify any patterns or commonalities that could help pinpoint the root cause.

• Review recent changes or deployments that might have introduced the issue.

• Consider reaching out to colleagues or experts for their insights and suggestions.

• If necessary, replicate the iss...read more

Customization options in VoIP industry vary based on business requirements.

• Customized call routing based on business hours and locations

• Integration with CRM systems for caller information

• Customized IVR menus for specific departments or services

• Call recording and transcription for compliance or training purposes

• Customized reporting and analytics based on specific KPIs

VoIP support can be improved by integrating AI bots for enhanced customer service and troubleshooting. The future of VoIP lies in seamless integration with AI bots for automation and efficiency.

• Integrating AI bots for real-time troubleshooting and customer support

• Implementing natural language processing for improved user interactions

• Utilizing AI for predictive maintenance and proactive issue resolution

• Enhancing security measures through AI-powered threat detection

• Exploring AI...read more

Microservices are smaller, independent services that work together, while monolithic model is a single, large application.

• Microservices are smaller, independent services that can be developed, deployed, and scaled independently.

• Monolithic model is a single, large application where all components are tightly coupled.

• Microservices communicate with each other through APIs, while monolithic applications use in-process communication.

• Microservices allow for better fault isolation a...read more

Dependency Injection (DI) in .NET Core promotes loose coupling and enhances testability through various implementation modes.

• DI is a design pattern that allows for the injection of dependencies rather than hard-coding them.

• In .NET Core, DI is built-in and can be configured in the Startup class using IServiceCollection.

• There are three main lifetimes for services: Transient, Scoped, and Singleton.

• Transient services are created each time they are requested, e.g., services that a...read more

Designing highly available solutions in Azure involves utilizing redundancy, load balancing, and fault tolerance.

• Utilize Azure Availability Zones to ensure redundancy and fault tolerance

• Implement Azure Load Balancer to distribute incoming traffic across multiple instances

• Use Azure Traffic Manager for global load balancing and failover

• Utilize Azure Auto Scaling to automatically adjust resources based on demand

• Implement Azure Site Recovery for disaster recovery and high availab...read more

Fetch data from an API and display it in a table with filtering functionality using JavaScript.

• Use fetch() to retrieve data from the API.

• Store the fetched data in a state variable (e.g., using useState in React).

• Map over the data to create table rows.

• Implement a filter function to update the displayed data based on user input.

• Example: Use an input field to filter results by name or category.

SLIs are crucial metrics for monitoring service performance and reliability, ensuring optimal user experience and system health.

• Availability: Measures the uptime of a service, e.g., ensuring a web application is accessible 99.9% of the time.

• Latency: Tracks the response time of requests, e.g., monitoring API response times to ensure they are under 200ms.

• Error Rate: Monitors the percentage of failed requests, e.g., keeping the error rate below 1% for critical services.

• Throughpu...read more

AppDynamics and Dynatrace are both application performance management tools, but they differ in features and focus areas.

• Focus Areas: AppDynamics is known for its deep application performance monitoring, while Dynatrace emphasizes full-stack observability, including infrastructure.

• User Experience Monitoring: AppDynamics offers robust end-user monitoring capabilities, whereas Dynatrace provides real user monitoring with session replay features.

• AI Capabilities: Dynatrace levera...read more

Effective .NET memory management reduces memory usage and improves application performance through various strategies.

• Use 'using' statements to ensure proper disposal of IDisposable objects, e.g., 'using (var stream = new FileStream(...)) { ... }'.

• Implement object pooling for frequently used objects to reduce allocation overhead, e.g., using a pool for database connections.

• Avoid large object allocations in the heap; use arrays or collections wisely to minimize fragmentation.

• L...read more

Snowflake's architecture enables scalable data warehousing with separation of storage and compute for optimized performance.

• Cloud-Native: Built on cloud infrastructure (AWS, Azure, GCP) for elasticity and scalability.

• Separation of Storage and Compute: Allows independent scaling of resources based on workload demands.

• Multi-Cloud Support: Enables data sharing and collaboration across different cloud platforms.

• Data Sharing: Securely share data in real-time with external partners...read more

I automate using Robot framework by creating test cases in a keyword-driven format and utilizing built-in libraries and custom keywords.

• Create test cases using Robot framework syntax

• Utilize built-in libraries for common tasks

• Develop custom keywords for specific automation needs

• Leverage variables and data-driven testing

• Integrate with external tools and APIs for comprehensive automation

To improve SQL query performance, optimize indexes, minimize data retrieval, use proper joins, and consider query structure.

• Optimize indexes to speed up data retrieval

• Minimize data retrieval by selecting only necessary columns

• Use proper joins (e.g. INNER JOIN instead of CROSS JOIN)

• Consider query structure and avoid unnecessary subqueries or functions

Production incident handling involves identification, assessment, resolution, and post-incident review to minimize impact and prevent recurrence.

• Incident Identification: Quickly detect incidents through monitoring tools or user reports. For example, using alerts from a logging system.

• Assessment and Prioritization: Evaluate the severity and impact of the incident to prioritize response. For instance, a critical system outage is prioritized over minor bugs.

• Incident Response: As...read more

Monitoring application availability involves tracking uptime, performance, and user experience to ensure seamless operation.

• Uptime Monitoring: Use tools like Pingdom or UptimeRobot to check if the application is accessible from various locations.

• Performance Monitoring: Implement APM tools like New Relic or AppDynamics to track response times and identify bottlenecks.

• User Experience Monitoring: Utilize real user monitoring (RUM) tools to gather data on how actual users experie...read more

Widgets can be integrated in Backbase portal by creating custom widgets using AngularJS and integrating them using Backbase widget API.

• Create custom widgets using AngularJS

• Integrate widgets using Backbase widget API

• Use Backbase widget API functions like bbData, bbEvent, bbStorage, etc.

• Customize widget appearance and behavior using CSS and JavaScript

Inter service communication in a distributed system involves communication between different services to achieve a common goal.

• Use of APIs for communication between services

• Message queues for asynchronous communication

• Service discovery for locating and connecting to services

• Implementing protocols like REST, gRPC, or MQTT

• Handling communication failures and retries

Virtual DOM is a lightweight representation of the actual DOM, enhancing performance and efficiency in web applications.

• Improves performance by minimizing direct DOM manipulations, which are costly in terms of time.

• Allows for efficient updates; only the changed elements are re-rendered, reducing unnecessary rendering.

• Facilitates a smoother user experience by enabling faster UI updates, especially in dynamic applications.

• Frameworks like React utilize Virtual DOM to optimize re...read more

Snowflake architecture separates storage and compute for efficient data processing and scalability.

• Multi-Cluster Architecture: Snowflake can scale compute resources independently, allowing for concurrent workloads without performance degradation.

• Data Storage: Uses a centralized storage layer that stores data in a compressed, columnar format, optimizing for both storage efficiency and query performance.

• Virtual Warehouses: Compute resources are organized into virtual warehouses...read more

Backbase architecture is the foundation for developing applications using the Backbase platform.

• Backbase architecture includes modules like Experience Manager, Portal Manager, and Forms.

• Developers need to understand how these modules interact and communicate with each other.

• Knowledge of RESTful APIs, microservices, and front-end technologies like AngularJS is essential for Backbase development.

Kubernetes handles scaling by automatically adjusting the number of pods based on resource usage.

• Kubernetes uses Horizontal Pod Autoscaler (HPA) to automatically scale the number of pods based on CPU or memory usage.

• HPA adjusts the number of replicas of a Deployment, ReplicaSet, or StatefulSet.

• Kubernetes also supports Vertical Pod Autoscaler (VPA) for adjusting resource requests and limits of pods based on resource usage.

• Cluster Autoscaler automatically adjusts the size of th...read more

Redux is a predictable state container for JavaScript apps, managing state through actions, reducers, and the store.

• 1. Store: Centralized state management. Example: const store = createStore(reducer);

• 2. Actions: Plain objects describing state changes. Example: { type: 'ADD_TODO', payload: 'Learn Redux' };

• 3. Action Creators: Functions that return actions. Example: const addTodo = (todo) => ({ type: 'ADD_TODO', payload: todo });

• 4. Reducers: Pure functions that take current stat...read more

Response time measures how quickly a system or application responds to a request, crucial for performance evaluation.

• Define Response Time: It is the duration from when a request is made until the first byte of the response is received.

• Measurement Tools: Use tools like Postman or JMeter to simulate requests and measure response times for APIs.

• Real User Monitoring: Implement tools like Google Analytics or New Relic to track response times from actual users in real-time.

• Benchmar...read more

Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as the same type.

• Polymorphism is a fundamental concept in object-oriented programming.

• It allows a single interface to be used for different types of objects.

• Polymorphism is achieved through method overriding and method overloading.

• Example: A shape class with different subclasses like circle, square, and triangle can be treated as a shape.

• Example: A superclass A...read more

Using .NET Core and Microservices allows for scalable, modular, and efficient development of applications.

• Increased scalability by breaking down applications into smaller, independent services

• Modular architecture allows for easier maintenance and updates

• Efficient resource utilization by only deploying necessary services

• Support for cross-platform development with .NET Core

Entity Framework Code First is an approach to create database schema from code.

• Allows developers to define the database schema using C# or VB.NET code

• Enables automatic generation of database schema based on code

• Supports migrations to update the database schema as the code changes