Apexon Interview Questions and Answers for Freshers

Program to find numbers divisible by 3 in a string and reverse their indexes.

• Iterate through the string and check if each character is a number divisible by 3.

• Store the divisible numbers in an array and reverse their indexes.

• Join the array back into a string and return the result.

Hyperparameters of SVM can be tuned using techniques like grid search, random search, and Bayesian optimization.

• Grid search involves defining a grid of hyperparameter values and evaluating the model performance for each combination.

• Random search randomly selects hyperparameter values from a defined range and evaluates the model performance.

• Bayesian optimization uses a probabilistic model to select the next set of ...read more

A decision tree is a flowchart-like structure used to make decisions or predictions based on multiple conditions or features.

• A decision tree is a hierarchical structure with nodes representing conditions or features, branches representing possible outcomes, and leaves representing final decisions or predictions.

• It is a popular machine learning algorithm used for classification and regression tasks.

• Each internal no...read more

Object oriented programming is a programming paradigm that uses objects to represent and manipulate data.

• Objects encapsulate data and behavior

• Classes define the blueprint for objects

• Inheritance allows for code reuse and polymorphism

• Examples include Java, C++, and Python

Java OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction, essential for object-oriented programming.

• Encapsulation: Bundling data and methods; e.g., using private variables with public getters/setters.

• Inheritance: Deriving new classes from existing ones; e.g., class Dog extends Animal.

• Polymorphism: Ability to take many forms; e.g., method overloading and overriding.

• Abstraction: Hiding co...read more

Sonarqube is a static code analysis tool used to detect code smells and bugs in code. It is integrated into CI/CD pipelines for continuous code quality checks.

• Sonarqube is a static code analysis tool that identifies code smells, bugs, and security vulnerabilities in code.

• Code smells are common programming issues that may indicate a deeper problem in the code. Examples include duplicated code, long methods, and com...read more