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Common data connectivity modes include DirectQuery, Import, Live Connection, and Composite models.
DirectQuery allows querying data directly from the data source in real-time.
Import mode imports data into Power BI for faster performance but may not reflect real-time data.
Live Connection connects Power BI to a data source without importing data.
Composite models combine DirectQuery and Import modes for flexibility.
Power BI components include Power Query, Power Pivot, Power View, and Power Map.
Power Query: Used for data extraction, transformation, and loading (ETL)
Power Pivot: Used for data modeling and analysis
Power View: Used for data visualization and interactive reports
Power Map: Used for geospatial data visualization
Power Query is used for data transformation and Power View is used for data visualization in Power BI.
Power Query is used to extract, transform, and load data from different sources.
Power View is used to create interactive visualizations and reports based on the transformed data.
Power Query is more focused on data preparation and cleaning, while Power View is focused on data visualization.
Power Query can be used to mer...
Relationship cardinality defines the number of instances of one entity that can be associated with the number of instances of another entity.
One-to-One: Each record in the first entity is associated with only one record in the second entity.
One-to-Many: Each record in the first entity can be associated with multiple records in the second entity.
Many-to-Many: Multiple records in the first entity can be associated with m
Having clause is used with aggregate functions while where clause is used to filter rows
Having clause is used with GROUP BY to filter groups based on conditions
Where clause is used to filter rows based on conditions
Having clause is applied after grouping while where clause is applied before grouping
Example: SELECT department, AVG(salary) FROM employees GROUP BY department HAVING AVG(salary) > 50000
Example: SELECT * FRO
Use SQL query with ORDER BY and LIMIT to find the 4th highest salary
Use ORDER BY clause to sort salaries in descending order
Use LIMIT 3,1 to skip the first 3 highest salaries and get the 4th highest salary
RLS stands for Row-Level Security, a feature in Power BI that restricts data access based on user roles.
RLS allows you to control which rows of data a user can access in a Power BI report or dashboard
You can define security roles and rules to filter data based on user attributes or roles
RLS helps in ensuring data privacy and compliance with regulations
For example, you can use RLS to restrict a sales manager to only see
Use SUMX function in DAX to calculate total sales of a product
Use SUMX function to iterate over each row in the sales table
Filter the table to include only the specific product
Sum up the sales amount for each row to get the total sales
Scenario based with power BI UI creation
Power BI is a business intelligence tool used for data visualization and analysis.
Power BI allows users to connect to various data sources such as databases, Excel files, and online services.
Users can create interactive reports and dashboards using Power BI's drag-and-drop interface.
Power BI offers a wide range of visualization options like charts, graphs, and maps to present data effectively.
Users can share their repo...
Power BI reports are visual representations of data insights, created using Power BI Desktop or Power BI Service.
Power BI reports are interactive and customizable
They can include various visualizations like charts, graphs, tables, and maps
Reports can be shared and accessed online through Power BI Service
Data can be refreshed in real-time or scheduled updates
posted on 8 Apr 2022
posted on 22 Oct 2024
posted on 9 Feb 2015
SQL command for creating a table
Use CREATE TABLE statement
Specify table name and column names with data types
Add any constraints or indexes as needed
SQL commands for inserting, updating, and deleting data from a table.
INSERT INTO table_name (column1, column2, column3) VALUES (value1, value2, value3);
UPDATE table_name SET column1 = new_value1 WHERE condition;
DELETE FROM table_name WHERE condition;
Truncate and drop are SQL commands used to remove data from a table.
Truncate removes all data from a table but keeps the structure intact.
Drop removes the entire table and its structure.
Truncate is faster than drop as it only removes data.
Drop cannot be undone while truncate can be rolled back.
Truncate resets the identity of the table while drop does not.
Examples: TRUNCATE TABLE table_name; DROP TABLE table_name;
C++ is an extension of C with object-oriented programming features.
C++ supports classes and objects while C does not.
C++ has better support for polymorphism and inheritance.
C++ has a standard template library (STL) while C does not.
C++ allows function overloading while C does not.
C++ has exception handling while C does not.
I am a software developer with experience in Java and Python.
I have a Bachelor's degree in Computer Science.
I have worked on various projects involving web development and data analysis.
I am proficient in Java and Python programming languages.
I have experience with frameworks such as Spring and Django.
I am familiar with databases such as MySQL and MongoDB.
I have always been fascinated by technology and its ability to solve complex problems.
I enjoy problem-solving and logical thinking
I have a natural curiosity for how things work
I see the potential for technology to make a positive impact on society
I have experience in programming and find it rewarding
I am excited about the constant innovation and evolution in the IT industry
My strengths include problem-solving, adaptability, and teamwork. My weakness is public speaking.
Strengths: problem-solving, adaptability, teamwork
Examples: I have successfully solved complex coding problems, adapted to new technologies quickly, and collaborated effectively with team members.
Weakness: public speaking
Examples: I get nervous when speaking in front of large groups, but I am working on improving my present
I have the technical skills, experience, and passion to excel in this role.
I have a strong background in software development, with expertise in multiple programming languages and frameworks.
I have experience working on complex projects and collaborating with cross-functional teams.
I am passionate about staying up-to-date with the latest technologies and trends in the industry.
I am a quick learner and adaptable to new ...
posted on 16 Aug 2015
Network layers are a hierarchical way of organizing communication protocols.
Network layers provide a modular approach to networking.
Each layer has a specific function and communicates with adjacent layers.
The OSI model has 7 layers, while the TCP/IP model has 4 layers.
Examples of layers include the physical layer, data link layer, network layer, transport layer, and application layer.
Deadlock is a situation where two or more processes are unable to proceed because they are waiting for each other to release resources.
Occurs in multi-threaded/multi-process environments
Can lead to system freeze or crash
Prevention techniques include resource ordering and timeouts
Example: Process A holds resource X and waits for resource Y, while Process B holds resource Y and waits for resource X
Paging and Segmentation are memory management techniques used by operating systems.
Paging divides memory into fixed-size pages and stores them in physical memory.
Segmentation divides memory into logical segments and stores them in physical memory.
Paging allows for efficient use of physical memory and reduces fragmentation.
Segmentation allows for protection and sharing of memory between processes.
Examples of operating s...
Developed a web-based project management tool for a startup
Used React for the frontend and Node.js for the backend
Implemented user authentication and authorization using JWT
Integrated with third-party APIs such as Trello and Slack
Implemented real-time updates using WebSockets
Deployed on AWS using EC2 and RDS
Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.
Start with 0 and 1 as the first two numbers
Add the previous two numbers to get the next number
Repeat until desired number of terms
I am a software engineer with experience in developing web applications and mobile apps.
Proficient in programming languages such as Java, Python, and JavaScript
Skilled in using frameworks like React, Angular, and Spring Boot
Experienced in working with databases such as MySQL and MongoDB
Familiar with Agile development methodologies and DevOps practices
There are numerous ways to use a box full of pencils depending on the context and purpose.
Pencils can be used for writing, drawing, sketching, coloring, shading, and more.
They can be used for artistic purposes, schoolwork, office work, or personal use.
Pencils can also be used as a tool for measurement, as a makeshift stylus, or even as a musical instrument.
The number of ways to use a box full of pencils is virtually li...
My dream is to build innovative software solutions that positively impact people's lives.
Developing cutting-edge technology
Creating user-friendly interfaces
Solving complex problems
Collaborating with talented individuals
Making a difference in society
Continuous learning and growth
Reverse a linked list using iterative and recursive methods.
Iterative method involves traversing the list and changing the pointers to reverse the order.
Recursive method involves calling the function recursively on the next node and changing the pointers.
Both methods have O(n) time complexity and O(1) space complexity.
Example: 1->2->3->4->5 becomes 5->4->3->2->1.
Clone a linked list with a random pointer.
Create a new node for each node in the original list.
Use a hash table to map the original nodes to their clones.
Iterate through the original list again and update the random pointers of the clone nodes.
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