Aavanor Systems Interview Questions and Answers

20 mins java leetcode

Q1. 60 mins discussion by tech lead
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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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Q1. Where do I see myself in 5 years
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Q2. What is the work I had done for my previous organisation
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This was contain aptitude and reasoning and basic question on python ,c.

Q1. The interviewer is very friendly and asks basic questions on coding .and explained internship process.
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Group Discussion was based on a generic topic, say, Disinvestment, and would revolve around your overall involvement in the team and the discussion.
In a GD, your skills of being in a team and being able to mindfully listen to your team while simultaneously putting up your own viewpoint, are basically looked at.

Q1. How do you interpret the CLRM assumptions?
Ans. 
CLRM assumptions are a set of assumptions that must be met for linear regression models to be valid.
• The errors are normally distributed

• The errors have constant variance (homoscedasticity)

• The errors are independent of each other

• The relationship between the independent and dependent variables is linear

• There is no multicollinearity among the independent variables
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Q2. What do you understand by the terms Multicollinearity and VIF?
Ans. 
Multicollinearity is a phenomenon where independent variables in a regression model are highly correlated. VIF is a measure to detect it.
• Multicollinearity can lead to unstable and unreliable regression coefficients.

• VIF stands for Variance Inflation Factor and is used to measure the degree of multicollinearity.

• A VIF value of 1 indicates no multicollinearity, while a value above 5 or 10 is considered high.

• To address mult...read more
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Learn join and windows functions

Asked me to create a Autocomplete Component within a specific time period

Q1. Mostly on JS, closure, hositing, let const and var keyword event loop, etc
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Q2. Questions about React JS
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Two DSA questions based on two pointers and frequency counter