Invenio Business Solutions Devops Consultant Interview Questions and Answers

Aptitude,reasoning,verbal,C language,Java,C++

Q1. What is interface in JAVA
Add your answer
Q2. Explain OOPS in JAVA
Add your answer

Q1. Project based backend and frontend
Add your answer
Q2. How to connect to backend
Ans. 
To connect to the backend, you can use APIs, database connections, or web services.
• Use APIs to send and receive data between the frontend and backend

• Establish database connections to retrieve and store data

• Utilize web services for communication between different systems
Answered by AI
Add your answer

Q1. What is class what is object what is different between private protected and public and default
Ans. 
A class is a blueprint for creating objects, while an object is an instance of a class. Private, protected, public, and default are access modifiers in object-oriented programming.
• A class is a template or blueprint that defines the properties and behaviors of objects.

• An object is an instance of a class, created using the class blueprint.

• Private access modifier restricts access to class members within the same class.

• Pro...read more
Answered by AI
View 1 more answer
Q2. What is object ?
Ans. 
An object is a self-contained entity that consists of both data and behavior.
• Objects are instances of classes in object-oriented programming.

• They encapsulate data and provide methods to manipulate that data.

• Objects can interact with each other through method calls and message passing.

• Examples of objects include a car, a person, or a bank account.
Answered by AI
View 1 more answer
Q3. What is public?
Ans. 
Public is a keyword in programming languages that denotes the accessibility of a class, method, or variable.
• Public is one of the access modifiers in object-oriented programming.

• It allows the class, method, or variable to be accessed from any other class or package.

• Public members are part of the public API of a software component.

• Example: public class MyClass { ... }

• Example: public void myMethod() { ... }

• Example: public
Answered by AI
View 1 more answer
Q4. What is private?
Ans. 
In programming, private is an access modifier that restricts the visibility of a class member to within its own class.
• Private is used to encapsulate data and prevent direct access from outside the class.

• Private members can only be accessed through public methods or properties.

• Private variables are often used to store internal state or implementation details.

• Private methods are used for internal logic and are not meant
Answered by AI
View 1 more answer
Q5. What is protected
Ans. 
protected is an access modifier in object-oriented programming that restricts access to members within the same package or subclasses.
• protected is one of the four access modifiers in Java, along with public, private, and default.

• Members declared as protected can be accessed within the same package or by subclasses.

• Protected members are not accessible outside the package unless accessed through inheritance.

• Example: prot...read more
Answered by AI
Add your answer

They asked from all the concepts wer have covered till now in Engineering.

Q1. Not applicable to this
Add your answer
Q2. Not applicable to this one
Add your answer

Q1. Not available, PFB
Add your answer
Q2. Please find below
Add your answer

Q1. It was related to core java, spring boot, Microservices
Add your answer

Q1. More technical round and cofing questions
Add your answer

Q1. Dependency injection in c#
Ans. 
Dependency injection in C# is a design pattern where dependencies are injected into a class rather than the class creating them itself.
• Dependency injection helps in achieving loose coupling between classes.

• It makes the code more testable and maintainable.

• There are different ways to implement dependency injection in C#, such as constructor injection, property injection, and method injection.
Answered by AI
View 1 more answer
Q2. Opps related questions inheritance, polymorphism, abstract classes and interfaces
Add your answer
Q3. Ooops knowledge should be perfect
Add your answer

Round duration - 90 minutes
Round difficulty - Medium

Q1. Cycle Detection in a Singly Linked List
You have given a Singly Linked List of integers, determine if it forms a cycle or not.
A cycle occurs when a node's next points back to a previous node in the ...read more
Ans. 
The task is to determine if a given singly linked list forms a cycle or not.
• A cycle occurs when a node's next points back to a previous node in the list.

• To solve this problem, we can use the Floyd's Cycle-Finding Algorithm.

• The algorithm uses two pointers, one moving at a normal pace and the other moving twice as fast.

• If there is a cycle, the fast pointer will eventually catch up to the slow pointer.

• If the fast pointer ...read more
Answered by AI
Add your answer

Round duration - 60 minutes
Round difficulty - Medium

Q1. Minimum Depth Of Binary Tree
You have been given a Binary Tree of integers, find the minimum depth of this Binary Tree. The minimum depth of a Binary Tree is the number of nodes along the shortest path fro...read more
Ans. 
The minimum depth of a binary tree is the number of nodes along the shortest path from the root node down to the nearest leaf node.
• The minimum depth can be found by performing a breadth-first search (BFS) traversal of the binary tree

• During the BFS traversal, keep track of the current level and increment the depth by 1 for each level

• Stop the BFS traversal when a leaf node is encountered and return the depth as the minim
Answered by AI
Add your answer
Q2. Intersection Of Two Arrays
You are given two arrays 'A' and 'B' of size 'N' and 'M' respectively. Both these arrays are sorted in non-decreasing order. You have to find the ...read more
Ans. 
The problem is to find the intersection of two sorted arrays.
• Use two pointers to iterate through the arrays.

• Compare the elements at the current pointers and move the pointers accordingly.

• If the elements are equal, add it to the intersection array and move both pointers.

• If the element in the first array is smaller, move the first pointer.

• If the element in the second array is smaller, move the second pointer.

• Repeat until...read more
Answered by AI
Add your answer
Q3. Operating System Question
What is the difference between a mutex and a semaphore
Ans. 
A mutex is a binary semaphore used for mutual exclusion, while a semaphore is a generalized synchronization primitive.
• Mutex is used to protect a critical section of code, allowing only one thread to access it at a time.

• Semaphore is used to control access to a shared resource, allowing multiple threads to access it simultaneously.

• Mutex has ownership, meaning the thread that locks it must unlock it.

• Semaphore does not hav...read more
Answered by AI
Add your answer

Round duration - 60 minutes
Round difficulty - Easy

Round duration - 25 minutes
Round difficulty - Easy