Consilio SQL Server Database Administrator Interview Questions and Answers

I am a dedicated and experienced SQL Server DBA with a strong background in database management and optimization.

• Over 5 years of experience in SQL Server database administration

• Proficient in performance tuning, backup and recovery, and security management

• Skilled in troubleshooting and resolving database issues

• Certified in SQL Server administration (e.g. MCSA: SQL Server)

Yes, I have experience working as a SQL Server DBA for 5 years.

• Managed and maintained SQL Server databases

• Performed database backups and restores

• Optimized database performance

• Implemented security measures

• Troubleshooted and resolved database issues

My expectation is to contribute my expertise in SQL Server administration to optimize database performance and ensure data integrity.

• Optimizing database performance through index tuning and query optimization

• Implementing security measures to protect sensitive data

• Monitoring database health and performance using tools like SQL Server Profiler

• Troubleshooting and resolving database issues in a timely manner

A database is a structured collection of data that is organized and stored for easy access, retrieval, and management.

• A database is used to store and manage large amounts of data.

• It provides a way to organize and structure data for efficient storage and retrieval.

• Databases use tables to store data in rows and columns.

• SQL (Structured Query Language) is commonly used to interact with databases.

• Databases can be relational...read more

SQL Server is a relational database management system developed by Microsoft.

• Developed by Microsoft

• Used for storing and retrieving data

• Supports SQL language for querying and managing databases

The resource database is a read-only system database that stores system objects and metadata for SQL Server. System databases are essential for the functioning of SQL Server.

• The resource database is hidden and cannot be accessed directly by users or administrators.

• It contains all the system objects that are included with SQL Server, such as system views and stored procedures.

• The resource database is used to upgrade sys...read more

There are 4 types of backups available in SQL Server: Full, Differential, Transaction Log, and File/Filegroup.

• Full backup: It backs up the entire database including all data and objects.

• Differential backup: It backs up only the changes made since the last full backup.

• Transaction Log backup: It backs up the transaction log, allowing point-in-time recovery.

• File/Filegroup backup: It backs up individual files or filegroups

Recovery model in SQL Server determines how transactions are logged and how the database can be restored.

• There are three recovery models in SQL Server: Simple, Full, and Bulk-Logged.

• Simple recovery model automatically truncates the transaction log and only allows restoring to the most recent full or differential backup.

• Full recovery model logs all transactions and allows restoring to a specific point in time using tran...read more

Hands-on experience with software and its practical applications.

• I have worked on various software projects and have experience in developing, testing, and deploying software applications.

• I have experience in programming languages such as Java, Python, and C++.

• I have worked on projects involving web development, mobile app development, and database management.

• I have experience in using software development tools such a...read more

A controller is a component that handles incoming requests and returns a response, while a REST controller specifically handles RESTful requests.

• A controller is responsible for handling various types of requests, such as HTTP, WebSocket, etc.

• A REST controller is a type of controller that specifically handles RESTful requests, which follow the principles of Representational State Transfer (REST).

• REST controllers typical...read more

A functional interface is an interface that has only one abstract method.

• Functional interfaces are used in lambda expressions and method references.

• They can have default methods and static methods.

• Examples include Runnable, Comparator, and Function interfaces.

• Functional interfaces can be annotated with @FunctionalInterface annotation.

Lambda expression is a concise way to represent anonymous functions in programming languages.

• Lambda expressions are commonly used in functional programming languages.

• They can be used to create functions on the fly without having to define them explicitly.

• Lambda expressions are often used in higher-order functions, such as map, filter, and reduce.

• They can also be used to create closures, which are functions that capture...read more

Exception propagation is the process of passing an exception up the call stack to be handled by a higher-level method.

• Exceptions are thrown when an error occurs in a method.

• If the exception is not caught and handled within the method, it is propagated up the call stack.

• Each method in the call stack has the option to catch and handle the exception or propagate it further up.

• If the exception reaches the top of the call s...read more

get() method returns null if the object is not found in the cache or database, while load() method throws an exception.

• get() method is eager loading while load() method is lazy loading.

• get() method returns the object from the database or cache while load() method returns a proxy object.

• get() method is slower than load() method.

• get() method is used when we are not sure if the object exists in the database or cache while...read more

Method overriding is when a subclass provides its own implementation of a method that is already defined in its superclass.

• Method overriding is used to achieve runtime polymorphism.

• The method signature (name, parameters, return type) must be the same in both the superclass and subclass.

• The access level of the overriding method cannot be more restrictive than the overridden method.

• Example: class Dog extends Animal { pub...read more

IOC and DI are design patterns used in Spring framework for loose coupling and dependency injection.

• IOC (Inversion of Control) is a design pattern where the control of object creation and lifecycle is handed over to a container or framework.

• DI (Dependency Injection) is a design pattern where the dependencies of an object are injected into it by an external entity, rather than the object creating them itself.

• Spring fram...read more

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

• HashMap uses an array of buckets to store key-value pairs

• Each bucket contains a linked list of entries with the same hash code

• When a key-value pair is added, its hash code is used to determine the bucket and added to the linked list

• When a value is retrieved, its hash code is used to find the bucket and search the linked ...read more

Spring Boot provides rapid application development and microservices architecture.

• Easy configuration and setup

• Embedded servers for faster development

• Auto-configuration of dependencies

• Supports multiple data sources

• Actuator for monitoring and managing applications

• Simplifies development of RESTful web services

• Enables building of microservices architecture

• Provides a wide range of plugins and extensions

• Reduces boilerplate c