Black Knight Mortgage Associate Interview Questions and Answers for Freshers

Q1. Interface vs abstract class
Ans. 
Interface defines a contract while abstract class provides partial implementation.
• Interfaces can only have abstract methods while abstract classes can have both abstract and non-abstract methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used for loose coupling while abstract classes are used for code reusability.

• Example of interface: Runnable interface in Java...read more
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Q2. What is Method overloading?
Ans. 
Method overloading is when a class has multiple methods with the same name but different parameters.
• Method overloading allows for flexibility in method calls

• The methods must have different parameters, such as different data types or different numbers of parameters

• Example: public void print(int num) and public void print(String str)

• The compiler determines which method to call based on the arguments passed
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Q3. Indexing of sqlsever dstsbase
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Indexing in SQL Server database
• Indexing improves query performance by creating a structure that allows for faster data retrieval

• Clustered and non-clustered indexes are the two types of indexes in SQL Server

• Clustered indexes determine the physical order of data in a table while non-clustered indexes create a separate structure

• Indexing should be done strategically to avoid over-indexing which can slow down data modificat
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Q4. Value type & reference type
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Q1. Only Salary negitiation
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Q1. Few common questions from project & why did u left your current organization
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Q1. OOPS concept Java fundamentals
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Q1. Project work framework Rest Assured
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Q1. Java 8 features
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Q2. Springboot , Microservice
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Q3. Docker knowledge
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Q4. Cloud concept like aws or azure
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Q1. Job change reason
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It was the easy round to clear they ask basic quans which include DBMS and grammar over all the round was easy

Q1. The test was condected by AI overall the round is easy
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Q1. They asked questions about my project and basic question in java
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Some mcq questions and coding question. Both where easy to medium level. Prepare combination/permutation/Time complexity etc

A question related to Binary search and some other follow ups.

Q1. Explain random forest
Ans. 
Random forest is an ensemble learning method that builds multiple decision trees and merges them to improve accuracy and prevent overfitting.
• Random forest is a type of ensemble learning method.

• It builds multiple decision trees during training.

• Each tree is built using a subset of the training data and a random subset of features.

• The final prediction is made by averaging the predictions of all the individual trees.

• Random...read more
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Q2. What is boosting
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Boosting is a machine learning ensemble technique where multiple weak learners are combined to create a strong learner.
• Boosting is an iterative process where each weak learner is trained based on the errors of the previous learners.

• Examples of boosting algorithms include AdaBoost, Gradient Boosting, and XGBoost.

• Boosting is used to improve the accuracy of models and reduce bias and variance.
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Q1. Why did we hired you
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Q2. What is next 5 years see your self
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Q1. Concepts on oops progressing the way that it will include
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Q2. Answers on the dilegent way
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