iB Hubs Interview Questions and Answers

Print a specific pattern using any programming language.

Q1. What is a class in Object-Oriented Programming (OOP)?
Ans. 
A class in OOP is a blueprint for creating objects, defining their properties and behaviors.
• Classes are templates for creating objects in OOP

• They define the properties (attributes) and behaviors (methods) of objects

• Objects are instances of classes, each with its own unique data

• Inheritance allows classes to inherit properties and behaviors from other classes

• Encapsulation ensures that the data is hidden and can only be a...read more
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Q2. What is the difference between an abstract class and an interface?
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while interface cannot have any implementation.

• A class can only extend one abstract class, but can implement multiple interfaces.

• Abstract classes are used to define common characteristics of subclasses, while interfaces are used to define contracts for...read more
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Q3. What is joining and creating an inner join query?
Ans. 
Joining is combining data from two or more tables based on a related column, while an inner join query retrieves only the matching records.
• Joining is used to combine data from multiple tables in a database.

• Inner join query retrieves only the records that have matching values in both tables.

• Syntax for inner join: SELECT columns FROM table1 INNER JOIN table2 ON table1.column = table2.column;

• Example: SELECT orders.order_i...read more
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Q1. Starts with a introduction, Core Java concepts, OOPS concepts, Singleton design pattern, Spring boot annotations like service, restcontroller.
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Q2. DSA logical questions like 2nd highest number. How to find missing number from an array.
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Q1. Tell me about yourself.
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring Boot, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring Boot, and Angular

• Strong problem-solving skills

• Experience working in Agile development environment

• Bachelor's degree in Computer Science from XYZ University
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Q2. Tell me about your family.
Ans. 
I come from a close-knit family of five, including my parents, older sister, and younger brother.
• Close-knit family of five

• Parents, older sister, and younger brother

• We enjoy spending time together traveling and trying new restaurants
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Q3. Why do you want to change the company
Ans. 
Seeking new challenges and opportunities for growth in a different environment.
• Desire for new challenges and learning opportunities

• Seeking a better work-life balance

• Interested in working with new technologies or industries

• Looking for a more collaborative team environment
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Q4. After that interviewer describes my work and position in the company.
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Q1. What is runtime polymorphism, and can you provide a code example to illustrate it?
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Q2. Streams in java
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Q3. How do we create threads in Java, and how do we invoke them?
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Q4. What is a Rest Template and how is it used?
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