Databorough Interview Questions and Answers

Q1. Difference between ref and out
Ans. 
ref is used for passing a variable by reference, out is used for returning a variable by reference
• ref is used for passing a variable by reference, allowing the method to modify the variable

• out is used for returning a variable by reference, typically used for returning multiple values from a method

• Example: int x = 10; SomeMethod(ref x); // x can be modified inside SomeMethod

• Example: int result; SomeMethod(out result); /
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Q2. Ref needs to be initialized before passing and will change, out no need to be initialized and
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Q1. Questions on statistics
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Q2. Questions on pandas
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Q1. What design pattern you usually used?
Ans. 
I usually use the MVC (Model-View-Controller) design pattern in my projects.
• Separates the application into three main components: Model (data), View (UI), and Controller (logic)

• Promotes code reusability, modularity, and maintainability

• Examples: Laravel framework in PHP, Spring framework in Java
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Q2. What is the difference between array and arraylist
Ans. 
Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.
• Array is a fixed-size collection of elements of the same data type, while ArrayList is a dynamic-size collection that can grow or shrink.

• Arrays can store primitive data types and objects, while ArrayList can only store objects.

• Arrays require a specified size during initialization, while ArrayList can dynamically resize itself.

• ...read more
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20 mins java leetcode

Q1. 60 mins discussion by tech lead
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Q1. Name Phone no , details addresss lst compnay
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