Sandvine Software Engineer Trainee Interview Questions and Answers

Q1. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
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Q2. Find missing number from nth number array.
Ans. 
Find missing number from nth number array.
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of numbers from 1 to n using the formula n*(n+1)/2

• Subtract the sum of array from the sum of numbers from 1 to n to find the missing number
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Q3. Explain inheritance and it types
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows a class to reuse code from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class, and multiple inheritance, where a class inherits from multiple parent classes.

• Example: Class B inherits from Class A, so Class B can access
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Q4. Find 2nd max elements from aaray
Ans. 
Find 2nd max element from array of strings
• Sort the array in descending order

• Skip the first element (max element)

• Return the second element
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Hacker rank, 3 questions with 1 hour duration

Q1. Stack parenthesis matching
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Q2. Linked List reversal
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Q1. Operating System basics
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Q2. Behavorial questions
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Q3. Networking Basics
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Q1. Data structure algorithm questions related to various scenarios
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Q2. DS Algo related questions which revolved around different scenarios
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Total 60 question 30 from C/C++ output and 30 from profit-loss, find age and related to ratio

Q1. Dsa coding question, aptitude, oops, rdbms(joins and normalization)
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Q2. Rotate materix(nxn) 90 degree
Ans. 
To rotate a matrix 90 degrees, transpose the matrix and then reverse each row.
• Transpose the matrix by swapping matrix[i][j] with matrix[j][i]

• Reverse each row of the transposed matrix to get the final rotated matrix
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Q3. A pattern printing question
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Q4. Reverse doubli-linkedlist
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Q5. Preorder traversal without using recursion
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Iterative solution to perform preorder traversal without using recursion
• Use a stack to keep track of nodes

• Start by pushing the root node onto the stack

• While the stack is not empty, pop a node, visit it, then push its right child followed by its left child onto the stack
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Q1. Introduce yourself
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Q2. Why you chose b.tech
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Q3. Why you chose cse
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Difficult online round

Q1. Arrays from neetcode
Ans. 
Arrays are a collection of strings in programming used to store multiple values under a single variable name.
• Arrays are declared using square brackets []

• Each element in an array is accessed by its index, starting from 0

• Example: var fruits = ['apple', 'banana', 'orange']
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Q2. Linked list from neetcode
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Q1. Trees in neet code
Ans. 
Trees in neet code refer to the implementation of tree data structures in coding challenges on the platform NeetCode.
• Trees are a common data structure used in coding challenges to represent hierarchical relationships between data.

• Common tree operations include traversal (inorder, preorder, postorder), insertion, deletion, and searching.

• Examples of tree-related coding challenges on NeetCode include implementing a binary...read more
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Q2. Trees in leet code
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Trees in leetcode are a common topic for coding interviews, involving various tree traversal and manipulation techniques.
• Understand different tree traversal methods like inorder, preorder, and postorder.

• Learn about common tree algorithms like finding the height, diameter, and lowest common ancestor.

• Practice solving tree-related problems on leetcode to improve your skills.
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Q1. Java basics , oops , spring
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Q1. Manger round basics behavior
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Q1. Find the min and max from List of Integers using java 8 streams.
Ans. 
Find min and max from List of Integers using Java 8 streams.
• Use the `stream()` method on the List to create a stream of integers.

• Use the `min()` method to find the minimum value.

• Use the `max()` method to find the maximum value.
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Q2. Find 2nd largest element using java 8 streams from list of integers.
Ans. 
Find 2nd largest element using Java 8 streams from a list of integers.
• Sort the list of integers in descending order using streams.

• Skip the first element to get the second largest element.
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Q3. Given a Product class and some ArrayList data Find which products has price greater than 200 using java 8 streams?. Find which products having maximum price?
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Q4. Increase a value of List of Integers by *2 and written new list.
Ans. 
Increase the values of a list of integers by 2 and create a new list.
• Iterate through the list of integers

• For each integer, add 2 to its value

• Create a new list with the updated values
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Q5. What are the java new features?
Ans. 
Java has introduced several new features in recent versions.
• Java 8 introduced lambda expressions, which allow for functional programming.

• Java 8 also introduced the Stream API for processing collections of data.

• Java 9 introduced the module system, which provides better encapsulation and modularity.

• Java 10 introduced local variable type inference, allowing the omission of explicit type declarations.

• Java 11 introduced the...read more
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Q6. @Components vs @Repository
Ans. 
The @Component and @Repository annotations are used in Spring Framework for different purposes.
• Both annotations are used to define beans in the Spring container.

• @Component is a generic stereotype annotation for any Spring-managed component.

• @Repository is a specialization of @Component used for DAO classes.

• The @Repository annotation provides additional exception translation for data access exceptions.

• Using @Repository i...read more
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Q7. @SpringBootApplication
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Q8. @Entity explain?
Ans. 
The @Entity annotation is used in Java to mark a class as an entity, which represents a table in a relational database.
• The @Entity annotation is part of the Java Persistence API (JPA) and is used in object-relational mapping (ORM) to map Java objects to database tables.

• It is typically used in conjunction with other JPA annotations like @Table, @Column, and @Id.

• The @Entity annotation is used to define the entity name, s...read more
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Q9. How the database is configure?
Ans. 
The database is configured by setting up the necessary parameters and configurations to ensure proper functioning and performance.
• Database configuration involves defining the database schema, tables, and relationships.

• It includes setting up indexes and constraints for data integrity.

• Configuring database security measures like user access control and permissions.

• Tuning database performance by optimizing query execution ...read more
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Q10. What is Dockerfile?
Ans. 
Dockerfile is a text file that contains instructions to build a Docker image.
• Dockerfile is used to automate the creation of Docker images.

• It specifies the base image, dependencies, environment variables, and commands to run.

• Each instruction in the Dockerfile creates a new layer in the image.

• Dockerfile can be version controlled and shared to ensure consistent builds.

• Example: FROM ubuntu:latest RUN apt-get update && apt-...read more
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Q11. Explain CI CD and your project deployment.
Ans. 
CI/CD is a software development practice that enables frequent and automated code integration, testing, and deployment.
• CI/CD stands for Continuous Integration and Continuous Deployment.

• It involves automating the process of integrating code changes, running tests, and deploying the application.

• CI/CD helps in reducing manual errors, improving code quality, and increasing development speed.

• Tools like Jenkins, GitLab CI/CD...read more
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Q12. What is mutable classes in java? How to create?
Ans. 
Mutable classes in Java are classes whose state can be modified after creation.
• Mutable classes allow changing their internal state

• They can have mutable fields or methods that modify their state

• To create a mutable class, define fields with non-final modifiers

• Provide public methods to modify the state of the class
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Q1. Yet to sChedule
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