Blue Dart Express Ltd Software Developer Interview Questions and Answers

Q1. Wap to print a prime number
Ans. 
A program to print prime numbers
• Iterate through numbers and check if each number is prime

• Use a nested loop to check divisibility by numbers less than the current number

• Print the number if it is prime
Answered by AI
Add your answer

Write program of a leap year

Q1. What is the concept of oops
Ans. 
OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.
• OOPs focuses on creating objects that interact with each other to solve problems

• Key concepts include encapsulation, inheritance, and polymorphism

• Encapsulation allows data to be hidden within an object and only accessed through methods

• Inheritance allows a class to inherit properties and methods f...read more
Answered by AI
Add your answer

Round duration - 90 minutes
Round difficulty - Medium

This was a Data Structures round. Both questions were answered in optimal time complexity with clean code. Every other question was answered to the best of my knowledge

Q1. 
Rotting Oranges Problem Statement
You are given an undirected and disconnected graph G(V, E) with V vertices numbered from 0 to V-1 and E edges. Your task is to perform a BFS traversal starting from the 0...read more
Ans. 
Perform BFS traversal on an undirected and disconnected graph starting from vertex 0.
• Implement BFS traversal algorithm starting from vertex 0

• Use a queue to keep track of visited nodes and their neighbors

• Print the traversal order in sorted order for each node's connected nodes
Answered by AI
Add your answer
Q2. 
Smallest Integer Not Representable as Subset Sum
Given a non-decreasing sorted array ARR of N positive numbers, determine the smallest positive integer that cannot be expressed as the sum of elements from...read more
Ans. 
Find the smallest positive integer that cannot be expressed as the sum of elements from any proper subset of a non-decreasing sorted array of positive numbers.
• Start with the smallest possible sum that can be represented, which is 1.

• Iterate through the array and update the smallest sum that cannot be represented.

• Return the final smallest sum that cannot be represented.
Answered by AI
Add your answer
Q3. 
BFS Traversal in a Graph
Given an undirected and disconnected graph G(V, E) where V vertices are numbered from 0 to V-1, and E represents edges, your task is to output the BFS traversal starting from the ...read more
Ans. 
BFS traversal of an undirected and disconnected graph starting from vertex 0.
• Implement BFS algorithm to traverse the graph starting from vertex 0.

• Use a queue to keep track of visited nodes and their neighbors.

• Ensure to visit all connected components of the graph.

• Print the BFS traversal sequence for each test case in a separate line.

• Handle cases where not all vertices are reachable from vertex 0.
Answered by AI
View 1 more answer

Round duration - 100 minutes
Round difficulty - Easy

Mostly technical and System Design questions were asked.

Q1. Design an LRU (Least Recently Used) cache.
Ans. 
Design an LRU cache to store least recently used items efficiently.
• Use a combination of a doubly linked list and a hashmap to store and retrieve items in O(1) time complexity.

• When an item is accessed, move it to the front of the linked list to mark it as the most recently used.

• If the cache is full, remove the least recently used item from the end of the linked list and the hashmap.
Answered by AI
Add your answer

The basic questions asked in an interview .

DP, graph, and array questions asked in 2nd round also asked my company project

Q1. Questions on Django middleware, models and queries
Add your answer

Q1. Design an algorithm to efficiently to send office bus to all location in the city
Ans. 
Use a greedy algorithm to send the office bus to all locations in the city efficiently.
• Start from the office location and pick the nearest location to visit next.

• Continue picking the nearest unvisited location until all locations are covered.

• Repeat the process until all locations are visited.

• Consider using Dijkstra's algorithm or a similar approach for finding the nearest location.

• Optimize the route by considering traf...read more
Answered by AI
Add your answer

Q1. Round with CTO, mostly behavioural and expected pay
Add your answer