100+ Senior Technical Lead Interview Questions and Answers

Trigger firing sequence in Oracle Forms 12c involves pre-insert, pre-update, pre-delete, post-insert, post-update, and post-delete triggers.

• Pre-insert trigger fires before a new record is inserted.

• Pre-update trigger fires before an existing record is updated.

• Pre-delete trigger fires before a record is deleted.

• Post-insert trigger fires after a new record is inserted.

• Post-update trigger fires after an existing record is updated.

• Post-delete trigger fires after a record is delete...read more

Various services like compute, storage, networking, databases, analytics, AI/ML, IoT, and more are used in the cloud.

• Compute services (e.g. AWS EC2, Azure Virtual Machines)

• Storage services (e.g. AWS S3, Google Cloud Storage)

• Networking services (e.g. AWS VPC, Azure Virtual Network)

• Database services (e.g. AWS RDS, Azure SQL Database)

• Analytics services (e.g. AWS Redshift, Google BigQuery)

• AI/ML services (e.g. AWS SageMaker, Azure Machine Learning)

• IoT services (e.g. AWS IoT, Azure...read more

I am highly adaptable to new environments and can quickly learn and adjust to new technologies and processes.

• I have a strong ability to learn quickly and efficiently

• I am comfortable with change and can easily adjust to new situations

• I am proactive in seeking out new information and resources to help me adapt

• I have experience working in diverse environments and with different teams

• I am open-minded and willing to try new approaches and methods

I have used code in various projects and industries, including finance, e-commerce, and healthcare.

• Finance: Developed trading algorithms and risk management systems.

• E-commerce: Built online shopping platforms and payment gateways.

• Healthcare: Created electronic medical record systems and medical imaging software.

To find the median in SQL, you can use the NTILE() function to divide the data into two halves and then calculate the average of the middle values.

• Use the NTILE() function to divide the data into two halves

• Calculate the average of the middle values to find the median

• Consider handling cases where the number of values is even or odd

The product life cycle is the stages a product goes through from introduction to withdrawal from the market.

• Introduction stage - product is launched and promoted

• Growth stage - sales and market share increase

• Maturity stage - sales peak and competition intensifies

• Decline stage - sales decrease and product may be discontinued

• Examples: iPhone (introduction), Coca-Cola (maturity), Blackberry (decline)

Virtual DOM is a lightweight copy of the actual DOM in memory, used for efficient updates and rendering in web development.

• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• When changes are made to the UI, the Virtual DOM is updated instead of the actual DOM.

• The Virtual DOM is then compared to the actual DOM, and only the differences are applied to the real DOM for rendering.

• This process helps in reducing the ...read more

Microservices offer scalability and flexibility but can increase complexity and require careful management.

• Pros: Scalability, flexibility, independent deployment, technology diversity

• Cons: Increased complexity, communication overhead, data consistency challenges

• Example: Netflix uses microservices to handle millions of requests daily

• Example: Amazon migrated to microservices to improve agility and scalability

To remove an element from a circular linked list, we need to update the pointers of the previous and next nodes.

• Find the node to be removed

• Update the pointers of the previous and next nodes

• Free the memory of the removed node

Use C++ to write an input stream to a file.

• Open the input stream and output file streams in C++.

• Read from the input stream and write to the output file stream.

• Close both streams after writing is complete.

HCL Commerce can be installed using the Installation Manager tool provided by HCL.

• Download the Installation Manager tool from the HCL website.

• Launch the Installation Manager and select the HCL Commerce package to install.

• Follow the prompts and provide the necessary information such as database credentials and installation directory.

• Once the installation is complete, configure the HCL Commerce instance using the Configuration Tool.

• Test the installation by accessing the HCL Com...read more

Application security is maintained through regular security assessments, code reviews, penetration testing, and implementing security best practices.

• Regular security assessments to identify vulnerabilities

• Code reviews to ensure secure coding practices are followed

• Penetration testing to simulate attacks and identify weaknesses

• Implementing security best practices such as input validation, encryption, and access control

• Using tools like firewalls, antivirus software, and intrusio...read more

MS Project architecture includes components like Project Server, Project Web App, Project Professional, and Project Online.

• Project Server is the central component that stores project data and manages access

• Project Web App is the web-based interface for accessing and managing projects

• Project Professional is the desktop application for creating and editing project plans

• Project Online is the cloud-based version of Project Server for online project management

Asynchronous communication allows processes to operate independently, enabling efficient data exchange without waiting for responses.

• Uses message queues to send and receive data (e.g., RabbitMQ, Kafka).

• Enables non-blocking operations, allowing tasks to run concurrently.

• Examples include email, SMS, and webhooks where responses are not immediate.

• In programming, async/await patterns in languages like JavaScript facilitate asynchronous calls.

A test plan can be created by identifying objectives, defining scope, selecting test cases, and determining resources.

• Identify objectives and goals of testing

• Define scope and boundaries of testing

• Select test cases based on objectives and scope

• Determine resources needed for testing

• Include timelines and milestones in the plan

• Review and update the plan regularly

Test estimations can be done by breaking down the testing tasks, identifying dependencies, and using historical data.

• Break down testing tasks into smaller, manageable units

• Identify dependencies between tasks

• Use historical data to estimate time and effort

• Consider the complexity of the system being tested

• Involve the testing team in the estimation process

• Use estimation techniques such as PERT or Three-Point Estimation

• Adjust estimates based on risk and uncertainty

Code to get unique numbers from array of strings

• Convert array of strings to array of integers

• Use a Set to store unique numbers

• Convert Set back to array if needed

AUTOSAR layers provide a structured approach to software architecture, with BSW layer offering low-level hardware access and services.

• AUTOSAR architecture consists of four layers: Application Layer, RTE Layer, BSW Layer, and MCAL Layer.

• BSW Layer provides standardized services for accessing hardware and managing resources, such as communication stacks, diagnostics, and memory management.

• Advantages of BSW Layer include portability, reusability, and scalability of software compo...read more

Action Center is a notification center in Windows 10 that displays notifications and quick actions.

• Action Center is accessible by clicking on the notification icon in the taskbar.

• It displays notifications from various apps and system events.

• Users can customize which apps can send notifications and which quick actions are displayed.

• Quick actions are shortcuts to frequently used settings like Wi-Fi, Bluetooth, and screen brightness.

• Action Center can also display alerts for secu...read more

As a Senior Technical Lead, I leverage my expertise in software architecture, team leadership, and project management to drive success.

• Expert in software architecture: Designed scalable microservices for a high-traffic e-commerce platform, improving performance by 30%.

• Strong leadership skills: Led a team of 10 developers, fostering collaboration and mentoring junior members to enhance their skills.

• Proficient in Agile methodologies: Implemented Scrum practices, resulting in a ...read more

CI/CD pipelines can be set up using tools like Jenkins, GitLab CI/CD, or AWS CodePipeline.

• Choose a CI/CD tool that suits your project requirements.

• Create a pipeline that includes stages for building, testing, and deploying your code.

• Integrate the pipeline with your version control system.

• Automate the pipeline to trigger on code changes.

• Monitor the pipeline for errors and failures.

• Continuously improve the pipeline based on feedback and metrics.

We use a variety of tools including programming languages, frameworks, version control systems, and project management tools.

• Programming languages such as Java, Python, C++, etc.

• Frameworks like Spring, React, Angular, etc.

• Version control systems like Git, SVN, Mercurial, etc.

• Project management tools such as Jira, Trello, Asana, etc.

RE Framework is a template for building automation processes in UiPath Studio.

• RE stands for Robotic Enterprise Framework

• It is a standardized template for building automation processes

• It follows a modular approach with reusable components

• It includes exception handling, logging, and reporting functionalities

• It helps in building scalable and maintainable automation solutions

The null coalescing operator (??) is used to provide a default value for nullable types if the value is null.

• Null coalescing operator (??) is used to return the left-hand operand if the operand is not null, otherwise it returns the right-hand operand.

• Example: int? x = null; int y = x ?? -1; // y will be -1 since x is null

• It is commonly used with nullable types to provide a default value if the nullable type is null.

Kubernetes is a container orchestration platform that automates deployment, scaling, and management of containerized applications.

• Kubernetes uses a master-slave architecture with a control plane and worker nodes.

• The control plane manages the overall state of the cluster and schedules workloads to worker nodes.

• Worker nodes run the containers and report back to the control plane.

• Kubernetes uses declarative configuration to define desired state and automatically reconcile with a...read more

Life cycle hooks are methods that allow you to tap into the lifecycle of a component in Angular.

• ngOnInit - called after Angular has initialized all data-bound properties

• ngOnChanges - called when an input property changes

• ngOnDestroy - called before the component is destroyed

• ngAfterViewInit - called after Angular has fully initialized a component's view

ELK is a monitoring tool that stands for Elasticsearch, Logstash, and Kibana.

• ELK is a combination of three open-source tools: Elasticsearch, Logstash, and Kibana.

• Elasticsearch is a search and analytics engine that stores and indexes data.

• Logstash is a data processing pipeline that ingests, processes, and sends data to Elasticsearch.

• Kibana is a visualization tool that allows users to interact with data stored in Elasticsearch.

• ELK is commonly used for log management, monitoring...read more