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ViaPlus by VINCI Highways
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posted on 27 Jan 2025
I was interviewed in Dec 2024.
Authentication verifies the identity of a user, while authorization determines what actions a user is allowed to perform.
Authentication confirms the user's identity through credentials like passwords or biometrics.
Authorization controls access to resources based on the authenticated user's permissions.
Example: Logging into a system with a username and password is authentication, while being able to view or edit specifi
I applied via Job Portal
Normal basic questions
Question will be different for everyone. 1st Question (easy-medium) (Arrays/Strings) , 2nd Question(medium-hard)(Trees/Graphs)
I applied via Naukri.com and was interviewed before Apr 2023. There were 2 interview rounds.
ref is used for passing a variable by reference, while out is used for passing a variable by reference and also requires the variable to be initialized before passing.
ref keyword is used to pass a variable by reference, allowing the called method to modify the value of the variable.
out keyword is similar to ref, but it requires the variable to be initialized before passing to the method.
Example: int x = 10; Method(ref ...
OOPs components in C# are the building blocks of object-oriented programming, including classes, objects, inheritance, polymorphism, and encapsulation.
Classes: Blueprint for creating objects with properties and methods.
Objects: Instances of classes that hold data and behavior.
Inheritance: Ability to create new classes based on existing ones, inheriting their properties and methods.
Polymorphism: Ability to use a single ...
MVC stands for Model-View-Controller, a software design pattern for organizing code in a way that separates concerns.
Model represents the data and business logic of the application.
View is responsible for displaying the data to the user.
Controller acts as an intermediary between Model and View, handling user input and updating the Model accordingly.
Example: In a web application, the Model could be a database, the View ...
There are four types of joins in SQL Server: INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
INNER JOIN: Returns rows when there is at least one match in both tables.
LEFT JOIN: Returns all rows from the left table and the matched rows from the right table.
RIGHT JOIN: Returns all rows from the right table and the matched rows from the left table.
FULL JOIN: Returns rows when there is a match in one of the tables.
I applied via Campus Placement and was interviewed before Aug 2023. There were 3 interview rounds.
Test based on aptitude
2 medium level questions and some mcqs
ViaPlus by VINCI Highways interview questions for designations
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I was interviewed before Dec 2020.
Round duration - 60 Minutes
Round difficulty - Medium
This round was purely based on Data Structures and Algorithms . One has to be fairly comfortable in solving Algorithmic problems to pass this round . Both the questions asked were quite common and luckily I had already prepared them from CodeStudio and LeetCode.
Given a Binary Tree with 'N' nodes, where each node holds an integer value, your task is to compute the In-Order, Pre-Order, and Post-Order traversals of the binar...
Compute the In-Order, Pre-Order, and Post-Order traversals of a Binary Tree given in level-order format.
Implement functions to perform In-Order, Pre-Order, and Post-Order traversals of a Binary Tree.
Use level-order input to construct the Binary Tree.
Traverse the Binary Tree recursively to generate the required traversals.
Ensure proper handling of null nodes represented by -1 in the input.
Return the three traversals as
Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.
The first line of input is an intege...
Reverse a singly linked list by altering the links between nodes.
Iterate through the linked list and reverse the links between nodes
Use three pointers to keep track of the current, previous, and next nodes
Update the links between nodes to reverse the list
Return the head of the reversed linked list
Round duration - 45 Minutes
Round difficulty - Medium
This round basically tested some concepts from Data Structures and File Manipulation .
Given two arrays A
and B
with sizes N
and M
respectively, both sorted in non-decreasing order, determine their intersection.
The intersection of two arrays in...
The problem involves finding the intersection of two sorted arrays efficiently.
Use two pointers to iterate through both arrays simultaneously.
Compare elements at the pointers and move the pointers accordingly.
Handle cases where elements are equal and update the intersection array.
Return the intersection array as the result.
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
I applied via Campus Placement
Regex for email validation
Start with a string of characters followed by @ symbol
Followed by a string of characters and a period
End with a string of characters with a length of 2-6 characters
Allow for optional subdomains separated by periods
Disallow special characters except for . and _ in username
Print prime numbers in a given range and optimize the solution.
Use Sieve of Eratosthenes algorithm to generate prime numbers efficiently
Start with a boolean array of size n+1, mark all as true
Loop through the array and mark all multiples of each prime as false
Print all the indexes that are still marked as true
Find angle between hour and minute hand in a clock given the time.
Calculate the angle made by the hour hand with respect to 12 o'clock position
Calculate the angle made by the minute hand with respect to 12 o'clock position
Find the difference between the two angles and take the absolute value
If the angle is greater than 180 degrees, subtract it from 360 degrees to get the smaller angle
To un-hash a string, use a reverse algorithm to convert the hash back to the original string.
Create a reverse algorithm that takes the hash as input and outputs the original string
Use the same logic as the hash function but in reverse order
If the hash function used a specific algorithm, use the inverse of that algorithm to un-hash the string
Print the level order traversal of binary tree in spiral form
Perform level order traversal of the binary tree
Alternate the direction of traversal for each level
Use a stack to reverse the order of nodes in each level
Print the nodes in the order of traversal
Find the maximum element in each subarray of size k in a given array.
Iterate through the array from index 0 to n-k.
For each subarray of size k, find the maximum element.
Store the maximum elements in a separate array.
Return the array of maximum elements.
To find the Kth largest element in two sorted arrays, we can use the merge step of merge sort algorithm.
Merge the two arrays into a single sorted array using a modified merge sort algorithm.
Return the Kth element from the merged array.
Merge two sorted arrays into one sorted array with expected time complexity of (m+n).
Use a two-pointer approach to compare elements from both arrays and merge them into the first array.
Start comparing elements from the end of both arrays and place the larger element at the end of the first array.
Continue this process until all elements from the second array are merged into the first array.
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