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Truncate removes all data from a table while delete removes specific rows.
Truncate is faster than delete as it doesn't log individual row deletions
Truncate cannot be rolled back while delete can be
Truncate resets the identity of the table while delete doesn't
Truncate doesn't fire triggers while delete does
To delete duplicate rows, we can use the DISTINCT keyword or GROUP BY clause in SQL.
Use the DISTINCT keyword to select unique rows from a table.
Use the GROUP BY clause to group rows with the same values and select only one row from each group.
Use the HAVING clause with GROUP BY to filter out groups with more than one row.
In Informatica, use the Sorter transformation to sort the data and then use the Aggregator transfor...
Star and snowflake are two types of database schema used in data warehousing.
Star schema is simpler and easier to understand.
Snowflake schema is more normalized and reduces data redundancy.
Star schema is better for simple queries and reporting.
Snowflake schema is better for complex queries and analysis.
Star schema has fewer tables and is faster for querying.
Snowflake schema has more tables and is slower for querying.
St...
I applied via Naukri.com and was interviewed in Jul 2024. There were 3 interview rounds.
Nested classes in Java have a hierarchical structure with the outer class containing the inner class, which can further contain more inner classes.
Nested classes are defined within another class, known as the outer class.
Inner classes have access to the members of the outer class.
Nested classes can be static or non-static.
The calling sequence for nested classes is OuterClass.InnerClass.method();
Example: OuterClass oute...
Oops concepts refer to Object-Oriented Programming principles like Inheritance, Polymorphism, Encapsulation, and Abstraction.
Inheritance: Allows a class to inherit properties and behavior from another class.
Polymorphism: Ability of objects to take on multiple forms.
Encapsulation: Bundling data and methods that operate on the data into a single unit.
Abstraction: Hiding the complex implementation details and showing only
Centric Consulting interview questions for popular designations
I applied via Approached by Company and was interviewed in Dec 2022. There were 2 interview rounds.
Real time programing questions
I applied via Referral and was interviewed in May 2022. There were 3 interview rounds.
I was interviewed before May 2023.
Dotnet is a software framework developed by Microsoft for building and running applications on Windows.
Dotnet is a platform that provides tools and libraries for developing various types of applications.
It supports multiple programming languages such as C#, VB.NET, and F#.
Dotnet includes a runtime environment called Common Language Runtime (CLR) which manages the execution of code.
It also includes a class library calle...
I applied via LinkedIn and was interviewed before Apr 2023. There were 3 interview rounds.
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