DataMetica Interview Questions, Process, and Tips

DSA coding 2-3 question

Java, DSA coding, java 8 coding, multithreading

Java8, spring-boot, DSA coding

Q1. DSA coding, java 8 coding, spring boot, mysql
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Q1. Explain traps in sap bo
Ans. 
Traps in SAP BO are common mistakes or issues that users may encounter while working with the software.
• Traps can include incorrect data mappings leading to inaccurate reports

• Traps can also involve using incorrect formulas or functions in reports

• Another trap is not properly setting up security permissions, leading to unauthorized access to sensitive data
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Q2. How will you improve performance of a report
Ans. 
To improve performance of a report, optimize queries, reduce data volume, use indexes, and cache data.
• Optimize queries by using proper filters and aggregations

• Reduce data volume by limiting unnecessary columns and rows

• Use indexes on frequently used columns for faster data retrieval

• Cache data to reduce the need for repeated queries
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Q3. Can you create a webi report without logging in?
Ans. 
No, a user must log in to create a webi report.
• A user must have the necessary permissions and access to create a webi report.

• Logging in ensures that the user's identity is authenticated and authorized to perform the action.

• Without logging in, the system cannot verify the user's credentials or permissions.
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Q4. What is aggregate table
Ans. 
An aggregate table is a table that contains aggregated data from one or more source tables.
• Used to improve query performance by pre-calculating and storing aggregated data

• Reduces the need to perform complex calculations on the fly

• Commonly used in data warehousing and business intelligence applications
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Q5. How will you point report to a new database
Ans. 
To point a report to a new database, you need to update the data source connection in the report settings.
• Open the report in SAP BO and go to the data source connection settings.

• Update the connection details like server name, database name, username, and password.

• Test the connection to ensure it is successful.

• Save the changes and refresh the report to fetch data from the new database.
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Q6. What are the @functions
Ans. 
The @functions in SAP BO are used for manipulating data and performing calculations in reports.
• Used for performing calculations and manipulating data in reports

• Can be used for conditional formatting

• Examples include @sum, @avg, @count
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Q7. What is data mining?
Ans. 
Data mining is the process of analyzing large datasets to discover patterns, trends, and insights.
• Data mining involves extracting useful information from large datasets

• It uses various techniques such as machine learning, statistics, and artificial intelligence

• Examples include market basket analysis, customer segmentation, and fraud detection
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Q1. Git related question
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Q2. Python list operation
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Q1. 1 question on merge sort, 1 question on SQL queries, oops concepts in depth with real-life examples, core java concepts in depth, collection framework.
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Q2. Merge 2 sorted arrays,
Ans. 
Merge 2 sorted arrays into a single sorted array.
• Create a new array with the combined length of the two input arrays

• Use two pointers to iterate through the two arrays and compare elements to merge them into the new array

• Handle cases where one array is longer than the other
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Q3. Find the top salary of a department
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Q4. 4 pillars of oops
Ans. 
Encapsulation, Inheritance, Polymorphism, Abstraction are the 4 pillars of OOPs
• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class in Java

• Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Parent and Child classes

• Polymorphism: Ability to present the same interface for different data types. Example: Method overloading and overr...read more
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