20+ Zebronics Interview Questions and Answers

The task is to find the equilibrium indices of a given sequence, where the sum of elements at lower indices is equal to the sum of elements at higher indices.

• Iterate through the sequence and calculate the total sum of all elements

• Initialize a left sum and right sum as 0

• For each index, update the left sum and right sum and check if they are equal

• If they are equal, add the index to the equilibrium indices

• Return the equilibrium indices

The task is to rearrange the nodes of a singly linked list in a specific order without altering the data of the nodes.

• Iterate through the linked list to find the middle node using the slow and fast pointer technique.

• Reverse the second half of the linked list.

• Merge the first and reversed second half of the linked list alternatively to get the desired order.

The task is to find the in-order traversal of a given binary tree.

• Implement a recursive function to perform in-order traversal of the binary tree

• Start from the left subtree, then visit the root node, and finally visit the right subtree

• Use an array to store the values of the nodes in the in-order traversal

Given a sorted matrix, find the position of a target integer in the matrix.

• Iterate through each row and column of the matrix

• Compare the target integer with the current element

• If the target integer is found, return the position

• If the target integer is not found, return {-1, -1}

The task is to find the total number of ways to paint fences using 2 colors such that at most 2 adjacent fences have the same color.

• Use dynamic programming to solve the problem

• Create a 2D array to store the number of ways to paint the fences

• Initialize the base cases for the first two fences

• Use recurrence relation to calculate the number of ways for the remaining fences

• Return the result modulo 10^9 + 7

The task is to extract and print the internet resource address from a given string.

• The internet resource address has a specific format: ://.ru[/]

• The can be either 'http' or 'ftp'

• The is a non-empty string of lowercase English letters

• The may or may not be present, and if present, it is a non-empty string of lowercase English letters

• If is not present, the address has either two '/' characters (before the domain) or three (an extra one in front of the context)

I have worked on various projects using different tech stacks including Java, Python, and JavaScript.

• Developed a web application using Java Spring Boot framework

• Created a data analysis tool using Python libraries such as Pandas and NumPy

• Built a real-time chat application using JavaScript and Node.js

• Implemented machine learning algorithms using Python's scikit-learn library

• Worked on a mobile application using React Native framework

The inner join operation combines rows from two tables based on a common column (key).

• Use the JOIN keyword in the SQL query to perform an inner join.

• Specify the common column (key) in the ON clause of the join.

• The result will contain only the matching rows from both tables.

Errors while submitting into p21

• Incorrect data format or structure

• Missing required fields

• Invalid data values

• Network connectivity issues

• Authorization/authentication problems

Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.

• Objects are instances of classes, which define the structure and behavior of the objects.

• Encapsulation, inheritance, and polymorphism are key principles of object oriented programming.

• Example: Java, C++, Python are popular languages that support object oriented programming.

Object-oriented programming paradigm focusing on objects and classes

• Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

• Inheritance: Ability of a class to inherit properties and behavior from another class

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the complex implementation details and showing only the necessary features

Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.

• Encapsulation helps in hiding the internal state of an object and restricting access to it.

• It allows for better control over the data by preventing outside interference.

• Encapsulation also promotes code reusability and modularity.

• Example: In object-oriented programming, classes encapsulate data fields and methods to operate on those fields.

Events in JavaScript are actions or occurrences that happen in the browser that the code can respond to.

• Events can be triggered by user actions (like clicking a button), browser actions (like page load), or system events (like a timer expiring)

• Event listeners are used to listen for and respond to events

• Common events include click, mouseover, keydown, submit, etc.

Domains such as healthcare, insurance, and public health typically have death details.

• Healthcare

• Insurance

• Public health