Wondrlab Interview Questions and Answers

Round duration - 90 Minutes
Round difficulty - Medium

1 easy and 2 medium-hard DSA problems to solve

Q1. 
Hurdle Game Problem Statement
Kevin is playing a hurdle game where he must jump over hurdles to clear levels. Each level ‘i’ consists of ‘i’ hurdles (e.g., Level 6 has 6 hurdles).
Given the total number ...read more
Ans. 
Given the total number of hurdles Kevin has jumped, determine how many levels he has cleared.
• Iterate through levels while subtracting hurdles from total jumped until remaining hurdles are less than current level

• Return the current level as the number of levels cleared
Answered by AI
Add your answer
Q2. 
N Queens Problem
Given an integer N, find all possible placements of N queens on an N x N chessboard such that no two queens threaten each other.
Explanation:
A queen can attack another queen if they ar...read more
Ans. 
The N Queens Problem involves finding all possible placements of N queens on an N x N chessboard without threatening each other.
• Use backtracking algorithm to explore all possible configurations.

• Keep track of rows, columns, and diagonals to ensure queens do not threaten each other.

• Generate valid configurations recursively and backtrack when a solution is not possible.
Answered by AI
Add your answer
Q3. 
Count Ways To Travel Triangular Pyramid
Bob is given a triangular pyramid with vertices 'O', 'X', 'Y', and 'Z'. He is also provided with an integer 'N'. Bob can move to any adjacent vertex in a single ste...read more
Ans. 
Calculate the number of ways Bob can complete a journey in a triangular pyramid after N steps.
• Bob can move to any adjacent vertex in a single step

• Bob must return to vertex 'O' after exactly 'N' steps

• Calculate the number of different ways Bob can complete the journey

• Return the result modulo 1000000007

• Consider the constraints provided
Answered by AI
Add your answer

Round duration - 60 Minutes
Round difficulty - Medium

2 DSA problems and computer subject questions

Q1. 
Generate Binary Strings with No Consecutive 1s
Given an integer K, your task is to produce all binary strings of length 'K' that do not contain consecutive '1's.
Input:
The input begins with an integer ...read more
Ans. 
Generate all binary strings of length 'K' with no consecutive '1's in lexicographically increasing order.
• Use backtracking to generate all possible binary strings of length 'K' with no consecutive '1's.

• Start with an empty string and recursively add '0' or '1' based on the condition of no consecutive '1's.

• Sort the generated strings in lexicographically increasing order before outputting them.
Answered by AI
Add your answer
Q2. 
Shuffle Two Strings Problem Statement
You are provided with three strings A, B, and C. The task is to determine if C is formed by interleaving A and B. C is considered an interleaving of A and B if:
• T...read more
Ans. 
Check if a string is formed by interleaving two other strings.
• Iterate through characters of A, B, and C simultaneously to check if C is formed by interleaving A and B.

• Use dynamic programming to efficiently solve the problem.

• Handle edge cases like empty strings or unequal lengths of A, B, and C.

• Example: A = 'aab', B = 'abc', C = 'aaabbc' should return True.
Answered by AI
Add your answer

Round duration - 60 Minutes
Round difficulty - Easy

DSA round

Q1. 
Ninja and Intersection of Lines
You are given coordinates for two lines on a 2D plane: Line 'AB' is defined by points 'A' and 'B', and Line 'PQ' is defined by points 'P' and 'Q'. Your task is to find the ...read more
Ans. 
Find the intersection point of two lines on a 2D plane given their coordinates.
• Calculate the slopes of both lines using the given coordinates.

• Use the slope-intercept form of a line to find the equations of the two lines.

• Solve the equations simultaneously to find the intersection point.

• Return the coordinates of the intersection point with precision up to 6 decimal places.
Answered by AI
Add your answer
Q2. 
Cycle Detection in Directed Graph
Determine if a given directed graph contains a cycle. If the graph has at least one cycle, return true. Otherwise, return false.
Input:
The first line of input contains...read more
Ans. 
Detect cycles in a directed graph and return true if a cycle exists, false otherwise.
• Use Depth First Search (DFS) to detect cycles in the directed graph.

• Maintain a visited array to keep track of visited vertices and a recursion stack to detect back edges.

• If a vertex is visited and is present in the recursion stack, then a cycle exists.

• Example: For the input 4 4, the graph has a cycle 0 -> 1 -> 2 -> 3 -> 1.
Answered by AI
Add your answer

Round duration - 30 Minutes
Round difficulty - Easy

It is a managerial round

Q1. How does a URL work and what is a load balancer?
Ans. 
A URL is a web address that specifies the location of a resource on the internet. A load balancer distributes incoming network traffic across multiple servers to ensure optimal resource utilization and prevent overload.
• A URL (Uniform Resource Locator) is a reference to a web resource that specifies its location on a computer network and the mechanism for retrieving it.

• URLs typically consist of a protocol (such as HTTP ...read more
Answered by AI
Add your answer

Case study on how to improve the app traffic

Q1. SQL, Advanced Excel,x
Add your answer
Q2. Business I ntelligence tools
Add your answer

8 SQL questions with increase in complexity and 1 case study

Q1. SQL and Statistics screaning
Add your answer

Q1. Business case studies, guess estimates, little technical
Add your answer

Q1. Complete profile screaning, Checking if candidate is suited for the role, case studies, guess estimates
Add your answer

Q1. Why sudden job change plan
Add your answer
Q2. Why Swiggy and what values did you see before applying
Ans. 
I chose Swiggy for its innovative technology, market leadership, and growth potential.
• Swiggy's cutting-edge technology in the food delivery industry stood out to me

• The company's strong market presence and leadership position were appealing

• I was impressed by Swiggy's rapid growth and expansion in the market

• Swiggy's customer-centric approach and focus on quality service were values I admired
Answered by AI
Add your answer

Q1. Self introduction Experience in
Add your answer
Q2. Attitude test Vocabulary
Add your answer

Q1. Self introduction
Add your answer

Q1. SQL hakcerank test, 10 questions 1 hour
Add your answer
Q2. On sql mainly, with some python and Excel.
Add your answer

Advance SQL test conducted by hackerrank

Q1. SQL and business case questions
Add your answer
Q2. Joins and windows
Add your answer