OLX Service Advisor Interview Questions and Answers

Q1. What is your name?
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Q2. Where are you from
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Q3. Can you provide information about the company?
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Q4. What is your motivation for joining this company?
Ans. 
I'm motivated to join this company due to its commitment to customer satisfaction and professional growth opportunities.
• I admire the company's reputation for excellent customer service, which aligns with my values.

• The opportunity for professional development through training programs excites me.

• I am drawn to the collaborative work environment that fosters teamwork and innovation.

• I appreciate the company's focus on sust...read more
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Q1. What is actual rule is using to sale more products in this company
Ans. 
The actual rule for selling more products in this company is to focus on customer needs and provide excellent customer service.
• Focus on customer needs and preferences

• Provide excellent customer service

• Offer promotions and discounts

• Maintain high product quality

• Stay up-to-date with market trends

• Build strong relationships with customers

• Encourage customer feedback and use it to improve

• Train sales staff to be knowledgeable a
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Round duration - 45 minutes
Round difficulty - Easy

This round was telephonic round. The interview lasted for approximately 45 minutes. The interviewer asked me three coding questions. I hustled a bit on 3rd question but after a hint was able to solve it.

Round duration - 120 minutes
Round difficulty - Easy

This round was Online Test on Hackerrank for 120 minutes, it contained 3 questions.

Q1. 
LRU Cache Design Question
Design a data structure for a Least Recently Used (LRU) cache that supports the following operations:
1. get(key) - Return the value of the key if it exists in the cache; otherw...read more
Ans. 
Design a Least Recently Used (LRU) cache data structure that supports get and put operations with capacity constraint.
• Use a combination of hashmap and doubly linked list to implement the LRU cache.

• Keep track of the least recently used item and evict it when the cache reaches its capacity.

• Update the position of an item in the cache whenever it is accessed or updated.

• Handle both get and put operations efficiently to main...read more
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Round duration - 60 minutes
Round difficulty - Easy

This round was face to face Interview at Ola Campus and lasted for 1 hour.

Round duration - 35 minutes
Round difficulty - Easy

This round was again a face to face technical interview, I was just asked one question in this round.

Round duration - 30 minutes
Round difficulty - Easy

Only a question of System Design was asked

Q1. Design a toll booth system for Ola cabs and explain the necessary functions and data structures used in it.
Ans. 
Design a toll booth system for Ola cabs with necessary functions and data structures.
• Use a queue data structure to manage the order of vehicles waiting at the toll booth.

• Implement functions for vehicle entry, toll calculation, and exit.

• Store vehicle information such as license plate number, type of vehicle, and toll amount in a hash map.

• Utilize a priority queue to handle VIP or premium customers efficiently.

• Include a f...read more
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Round duration - 30 minutes
Round difficulty - Easy

Very general HR questions were asked

Round duration - 90 minutes
Round difficulty - Medium

It was in the morning, where there were 3 questions to answer.

Q1. 
Number of Islands Problem Statement
You are provided with a 2-dimensional matrix having N rows and M columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...read more
Ans. 
Count the number of islands in a 2D matrix of 1s and 0s.
• Use Depth First Search (DFS) or Breadth First Search (BFS) to traverse the matrix and identify connected groups of 1s.

• Maintain a visited array to keep track of visited cells to avoid redundant traversal.

• Increment the island count each time a new island is encountered.

• Consider all eight possible directions for connectivity while traversing the matrix.

• Handle edge ca...read more
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Q2. 
Missing Numbers Problem Statement
You are provided with an array called ARR, consisting of distinct positive integers. Your task is to identify all the numbers that fall within the range of the smallest a...read more
Ans. 
Identify missing numbers within the range of smallest and largest elements in an array.
• Find the smallest and largest elements in the array.

• Generate a list of numbers within this range.

• Filter out the numbers present in the array.

• Return the missing numbers in sorted order.
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Q3. 
Count Leaf Nodes in a Binary Tree
Given a binary tree, your task is to count and return the number of leaf nodes present in it.
A binary tree is a data structure where each node has at most two children,...read more
Ans. 
Count and return the number of leaf nodes in a binary tree.
• Traverse the binary tree and count nodes with both left and right children as NULL.

• Use recursion to traverse the tree efficiently.

• Leaf nodes have no children, so check for NULL left and right children to identify them.
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Round duration - 20 minutes
Round difficulty - Medium

It was a system design round.

Q1. Can you describe the system design of the OLA app?
Ans. 
OLA app system design involves multiple components like user interface, driver matching algorithm, payment processing, etc.
• User interface for booking rides and tracking

• Driver matching algorithm based on location and availability

• Payment processing for seamless transactions

• Real-time tracking of rides for both users and drivers
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Round duration - 45 minutes
Round difficulty - Medium

It was a DS Algo round.

Q1. 
Diagonal Traversal of a Binary Tree Problem Statement
Given a binary tree, your task is to determine the diagonal traversal of the tree.
Example:
Input:
1 2 3 4 -1 5 6 -1 7 -1 -1 -1 -1 -1 -1
Output:
...read more
Ans. 
Diagonal traversal of a binary tree involves traversing nodes diagonally from top to bottom and left to right.
• Traverse the tree level by level, starting from the root node.

• For each level, keep track of the diagonal nodes and their children.

• Use a queue to store nodes at each level and traverse them accordingly.

• Example: For input 1 2 3 4 -1 5 6 -1 7 -1 -1 -1 -1 -1 -1, the diagonal traversal is 1 3 6 2 5 4 7.
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Q2. 
Minimum Number Of Taps To Water Garden Problem Statement
You are required to determine the minimum number of taps that need to be opened to water an entire one-dimensional garden defined along the x-axis,...read more
Ans. 
Find the minimum number of taps to water an entire garden along the x-axis.
• Iterate over the taps and find the farthest point each tap can reach.

• Sort the taps based on their starting points and use a greedy approach to select the taps.

• Keep track of the farthest point reachable by the selected taps and the number of taps opened.

• Return the minimum number of taps needed to water the entire garden or -1 if it's impossible.
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Round duration - 15 minutes
Round difficulty - Medium

HR Round

Round duration - 60 minutes
Round difficulty - Easy

Two coding questions were given in the first round to be solved in 60 minutes.

Q1. 
Rearrange Array Elements Problem Statement
Given an array A containing 'N' integers and an integer m, rearrange the elements of the array such that the differences between the array elements and m are sor...read more
Ans. 
Rearrange array elements based on their differences from a given integer.
• Calculate the differences between each element and the given integer.

• Sort the elements based on their differences while maintaining the original order for elements with the same difference.

• Implement a function to rearrange the array elements as per the given criteria.
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Q2. 
Print Nodes at Distance K from a Given Node
Given an arbitrary binary tree, a node of the tree, and an integer 'K', find all nodes that are at a distance K from the specified node, and return a list of th...read more
Ans. 
The task is to find all nodes in a binary tree that are at a distance K from a given node.
• Traverse the binary tree to find the given node

• From the given node, perform a depth-first search to find all nodes at distance K

• Use a list to store the values of the nodes at distance K

• Return the list of values in any order
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Round duration - 60 minutes
Round difficulty - Easy

This was a technical round with questions based on DSA, DBMS, Computer Networking and project based questions.

Q1. 
Triangle of Numbers Pattern
Ninja is tasked with printing a triangle pattern based on a given number 'N' for any test case.
Example:
Input:
N = 4
Output:
   1
  232
 34545
4567654
Explanation:
The pat...read more
Ans. 
Print a triangle pattern of numbers based on a given number 'N'.
• Iterate through each row and print the numbers accordingly

• Use spaces to center-align the numbers in each row

• Increment the numbers in each row as per the pattern
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Q2. What is the difference between a web server and an application server?
Ans. 
Web server serves static content over HTTP, while application server runs dynamic content and business logic.
• Web server handles HTTP requests and responses, serving static content like HTML, images, and CSS.

• Application server executes business logic, runs dynamic content, and interacts with databases.

• Web server examples include Apache, Nginx, while application server examples include Tomcat, JBoss.

• Web server focuses on...read more
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Q3. How does the internet work?
Ans. 
The internet is a global network of interconnected computers that communicate using standardized protocols.
• The internet is made up of a vast number of interconnected networks of computers.

• Data is transmitted over the internet using protocols such as TCP/IP.

• Websites are hosted on servers connected to the internet, and users access them using web browsers.

• Internet Service Providers (ISPs) provide access to the internet f...read more
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Q4. Write a SQL query to find the nth highest salary.
Ans. 
SQL query to find the nth highest salary
• Use the 'SELECT DISTINCT' statement to get unique salary values

• Order the salaries in descending order using 'ORDER BY' clause

• Use 'LIMIT' and 'OFFSET' to get the nth highest salary
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Round duration - 30 minutes
Round difficulty - Easy

Typical HR round with behavioral problems.