Decision Minds Senior Data Engineer Interview Questions and Answers

Q1. Define marker interface
Ans. 
A marker interface is an interface with no methods used to mark a class as having a particular property or behavior.
• Marker interfaces are used to provide metadata about a class.

• They are often used in frameworks and libraries to indicate that a class should be treated in a special way.

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

• Marker interfaces can also be used to enforce design patterns, su
Answered by AI
Add your answer
Q2. Define thread concurrency
Ans. 
Thread concurrency refers to multiple threads executing simultaneously in a program.
• Concurrency allows for efficient use of resources and can improve performance.

• However, it can also lead to race conditions and other synchronization issues.

• Synchronization mechanisms like locks and semaphores can be used to manage concurrency.

• Examples of concurrent programming languages include Java and Python's threading module.
Answered by AI
Add your answer

Q1. Difference between Asp.net and Ado.net? Explain about Ado.net complete briefly?
Ans. 
ASP.NET is a web development framework while ADO.NET is a data access technology for connecting to databases.
• ASP.NET is used for building web applications, while ADO.NET is used for accessing and manipulating data from databases.

• ASP.NET provides a framework for creating dynamic web pages, handling user input, and managing state, while ADO.NET provides a set of classes for interacting with databases.

• ASP.NET includes fea...read more
Answered by AI
Add your answer
Q2. Difference between Functions and stored procedure?
Ans. 
Functions return a value while stored procedures do not.
• Functions are used to perform a specific task and return a value to the caller.

• Stored procedures are used to execute a set of SQL statements and do not return a value.

• Functions can be used in SQL statements while stored procedures cannot.

• Functions can be called from within stored procedures.

• Functions are deterministic while stored procedures may not be.

• Functions c...read more
Answered by AI
Add your answer
Q3. Interface Inheritance Difference between overloading and overriding
Ans. 
Interface is a contract that defines the methods a class must implement. Inheritance is the ability of a class to inherit properties and methods from another class.
• Interface is used to achieve abstraction and multiple inheritance in Java.

• Inheritance allows code reuse and promotes code organization.

• Overloading is having multiple methods with the same name but different parameters.

• Overriding is providing a different impl...read more
Answered by AI
Add your answer

Q1. DevOps tools related questions
Add your answer
Q2. And python programming questions
Add your answer

Q1. Basic ios Questions No DS questions
Add your answer
Q2. Basic swift quesions
Add your answer
Q3. In App Purchase
Add your answer
Q4. Hardware Device connectivity
Add your answer

Q1. Communication and behavioral skills
Add your answer
Q2. Introduction, Skill set, Relevant experience
Add your answer

Q1. AWS - EC2, Lambda, VPC, Route53, Cognito, Cloudwatch, Kinesis, API Gateway
Add your answer
Q2. ITIL - problem management, recently handled outages. SLA vs SLO. KPIs
Add your answer

Q1. DevOps - SDLC explanation, Apache Tomcat, Linux Administration, Docker and Shell scripting
Add your answer
Q2. Git, Python, Monitoring tools
Add your answer

Q1. Salary expectations and other benefits discussion
Add your answer

Q1. Salary Negotiation and salary structure explanation
Add your answer

Topics:
Python, Django, MySQL, Automation, Technical questions

Q1. Topics: Python, Django, MySQL, Automation, Technical questions
Add your answer
Q2. Explain Django Architecture
Ans. 
Django follows Model-View-Controller (MVC) architectural pattern.
• Django has a high-level architecture that follows the Model-View-Controller (MVC) architectural pattern.

• The Model layer represents the database schema and business logic.

• The View layer is responsible for rendering the templates and presenting the data to the user.

• The Controller layer handles the user's input and interacts with the Model and View layers.

• Dj...read more
Answered by AI
Add your answer
Q3. Difference between XML and JSON
Ans. 
XML is a markup language while JSON is a lightweight data interchange format.
• XML uses tags to define elements while JSON uses key-value pairs.

• XML is more verbose and complex than JSON.

• JSON is easier to read and parse than XML.

• XML supports namespaces and validation while JSON does not.

• XML is widely used in web services and document exchange while JSON is preferred for data exchange between applications.
Answered by AI
Add your answer

Puzzles, speed, logical questions

Q1. Self introduction
Add your answer
Q2. Background and coding knowledge
Add your answer