30+ Senior System Analyst Interview Questions and Answers

Yes, I am proficient in writing SQL queries.

• I have experience in writing complex SQL queries for data analysis and reporting.

• I am comfortable with using various SQL functions and clauses such as JOIN, GROUP BY, and WHERE.

• I have worked with different database management systems such as MySQL, Oracle, and SQL Server.

• I am familiar with optimizing queries for performance and efficiency.

• I have also created stored procedures and triggers using SQL.

Use case for a banking system focusing on account management and transaction processing.

• Actors: Customer, Bank System, Bank Employee

• Preconditions: Customer must have an active bank account.

• Main Flow: Customer logs in, views account balance, initiates a transfer.

• Postconditions: Transaction is recorded, and account balance is updated.

• Exceptions: Insufficient funds, invalid account number.

Effective negotiation with clients involves understanding their needs, clear communication, and finding mutually beneficial solutions.

• Listen actively to the client's concerns to understand their perspective.

• Prepare by researching the client's background and previous interactions.

• Use clear and concise communication to articulate your position.

• Seek common ground by identifying shared goals or interests.

• Propose flexible solutions that can accommodate the client's needs while mee...read more

Sticky bit is a permission bit in Linux that allows only the owner of a file or directory to delete or rename it. Soft link and hard link are two types of links used in Linux file systems.

• Sticky bit is denoted by 't' in the permission bits of a file or directory

• Soft link is a symbolic link to a file or directory and can be created using the 'ln -s' command

• Hard link is a link to a file and shares the same inode as the original file. It can be created using the 'ln' command

• Soft...read more

Permissions control access to files and directories. FTP commands include PUT, GET, and LS.

• Permissions determine who can read, write, and execute files and directories

• Commands for FTP include PUT (uploading files), GET (downloading files), and LS (listing files on the server)

• FTP also uses authentication and encryption to secure file transfers

Techniques to optimize system performance include resource management, caching, load balancing, and code optimization.

• Resource Management: Efficiently allocate CPU, memory, and storage to prevent bottlenecks.

• Caching: Store frequently accessed data in memory to reduce retrieval time (e.g., using Redis).

• Load Balancing: Distribute workloads across multiple servers to enhance responsiveness and availability.

• Code Optimization: Refactor code to improve execution speed and reduce re...read more

Creating an immutable class involves making the class and its fields final and not providing any setters.

• Make the class final so it cannot be extended

• Make all fields final so they cannot be changed

• Do not provide any setters, only getters

• If mutable objects are used in the class, return copies of them in getters

HR questions in TCS focus on candidate's experience, skills, and behavior.

• Questions about your previous work experience and projects

• Behavioral questions to assess your problem-solving skills and teamwork abilities

• Questions about your technical skills and knowledge in the field

• Questions about your career goals and aspirations

• Questions about how you handle challenges and conflicts in the workplace

TCS offers a unique work environment with a focus on innovation, collaboration, and continuous learning.

• TCS encourages innovation and creativity in problem-solving.

• The company promotes a culture of collaboration and teamwork.

• Employees have access to continuous learning opportunities through training programs and certifications.

• TCS values diversity and inclusion in the workplace.

The @Qualifier annotation is used in Spring to resolve ambiguity when multiple beans of the same type are present.

• It is used to specify which bean should be autowired when multiple beans of the same type are present

• It can be used with constructor injection, setter injection, and field injection

• It is commonly used in conjunction with @Autowired annotation

• Example: @Qualifier("myBean")

Use a query to find the 2nd highest number in a dataset

• Use the ORDER BY clause to sort the numbers in descending order

• Use the LIMIT clause to retrieve the second row

Application insights can be implemented by adding the Application Insights SDK to the application code.

• Add the Application Insights SDK to the application code

• Configure the instrumentation key for the application

• Use the Application Insights portal to view telemetry data

• Set up alerts and notifications for important events

• Use Application Insights API to retrieve data programmatically

Marker interfaces are interfaces with no methods, used to mark a class as having a certain property or behavior.

• Marker interfaces are used to provide metadata about a class.

• They are used to indicate that a class implements a certain behavior or has a certain property.

• Examples include Serializable, Cloneable, and Remote interfaces in Java.

• Marker interfaces can also be used to trigger specific behavior in frameworks or libraries.

• They are often used in combination with reflectio...read more

jdbctemplate is a class in Spring Framework that simplifies the use of JDBC while handling exceptions and boilerplate code.

• It is used to perform database operations such as querying, updating, and deleting data.

• It provides methods for executing SQL statements and mapping results to Java objects.

• It handles exceptions and releases resources automatically.

• Example: jdbcTemplate.queryForObject("SELECT COUNT(*) FROM users", Integer.class);

.NET Core is a cross-platform framework while DI is a built-in dependency injection system in .NET Core.

• DI in .NET Core is a built-in dependency injection system that allows for loosely coupled code.

• .NET Core is a cross-platform framework that can run on Windows, Linux, and macOS.

• DI in .NET Core can be configured using various methods such as constructor injection, property injection, and method injection.

• In .NET Core, DI is used to manage the dependencies of an application a...read more

Multi-threading is the ability of a CPU to execute multiple threads concurrently, allowing for better performance and responsiveness.

• Allows multiple tasks to run concurrently on a single CPU

• Improves performance by utilizing idle CPU time

• Can lead to synchronization issues and race conditions

• Examples: web servers handling multiple requests simultaneously, video games rendering graphics while processing user input

To troubleshoot AD issues, I analyze logs, check network connectivity, verify DNS settings, and test user authentication.

• Analyze event logs for any errors or warnings related to Active Directory

• Check network connectivity between the domain controller and client machines

• Verify DNS settings to ensure proper resolution of domain controller names

• Test user authentication by logging in with different user accounts

Domain migration involves transferring data, applications, and infrastructure from one domain to another.

• Assess current domain setup and requirements for new domain

• Plan migration strategy including timeline and resources

• Backup data and applications to prevent loss

• Test migration process in a controlled environment

• Execute migration with minimal downtime and disruptions

• Verify data integrity and functionality post-migration

• Update configurations and settings to align with new doma...read more

Join query to retrieve data from two related tables

• Use INNER JOIN to combine rows from two tables based on a related column

• Specify the columns to select from each table in the SELECT statement

• Use ON clause to specify the related column for joining the tables

One challenge in project development is managing changing requirements.

• Adapting to new requirements from stakeholders

• Ensuring project scope remains on track

• Communicating changes effectively to team members

Hashmap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.

• Hashmap uses an array to store the key-value pairs

• The key is hashed to generate an index in the array

• If two keys hash to the same index, a linked list is used to store the values

• Hashmap provides constant time complexity for insertion, deletion, and retrieval

• Java's Hashmap implementation uses a load factor to determine when to resize the array

Angular is a complete framework while React is a library for building UI components.

• Angular has a steeper learning curve and requires more setup time.

• React is more flexible and can be easily integrated into existing projects.

• Angular uses two-way data binding while React uses one-way data flow.

• Angular has a larger file size while React is lightweight.

• Angular has a built-in dependency injection system while React does not.

• Examples of companies using Angular include Google and M...read more

RAM is volatile memory used for temporary storage, while ROM is non-volatile memory used for permanent storage.

• RAM stands for Random Access Memory and is used for temporary storage of data and program instructions.

• ROM stands for Read-Only Memory and is used for permanent storage of firmware and software that rarely changes.

• RAM is faster but loses data when power is turned off, while ROM is slower but retains data even when power is off.

• Examples of RAM include DDR4, DDR3, etc....read more

A promise is a commitment made by one party to another to do something in the future.

• A promise is a guarantee or assurance that a certain action will be taken or a certain outcome will be achieved.

• Promises are commonly used in programming to handle asynchronous operations.

• Promises can be resolved (fulfilled) or rejected based on the outcome of the action.

• Example: A promise to deliver a product by a certain date.

• Example: Using a promise in JavaScript to handle the result of an...read more

Worked on various AWS resources including EC2, S3, RDS, Lambda, and CloudFormation.

• EC2 - Elastic Compute Cloud for scalable computing capacity

• S3 - Simple Storage Service for object storage

• RDS - Relational Database Service for managed databases

• Lambda - Serverless computing service for running code without provisioning servers

• CloudFormation - Infrastructure as Code service for automating resource provisioning

Blue screen of death is a Windows operating system error screen that appears when a system error occurs.

• Blue screen of death (BSOD) is a stop error screen that appears when the Windows operating system encounters a critical error and cannot recover.

• It is often caused by hardware failures, driver issues, or software problems.

• BSOD displays a specific error code and sometimes a brief description of the problem to help diagnose the issue.

• Common solutions include restarting the co...read more

Design patterns are reusable solutions to common software problems.

• Design patterns help in creating flexible, reusable, and maintainable code.

• Some common design patterns in C# are Singleton, Factory, Observer, and Decorator.

• Singleton pattern ensures that only one instance of a class is created.

• Factory pattern provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.

• Observer pattern defines a one-to-man...read more