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InMobi Interview Questions and Answers
39 Interview questions
Polyfill of promise is a code that adds support for promises in older browsers.
Polyfill is used to fill in the gaps in browser support for certain features.
For promises, a polyfill can be used to provide support in older browsers that do not natively support promises.
Popular promise polyfills include 'es6-promise' and 'bluebird'.
Types of encryption include symmetric encryption, asymmetric encryption, and hashing.
Symmetric encryption: Uses the same key for both encryption and decryption, examples include AES and DES.
Asymmetric encryption: Uses a pair of public and private keys for encryption and decryption, examples include RSA and ECC.
Hashing: Converts data into a fixed-size string of bytes, examples include MD5 and SHA.
Implement a stack that supports push, pop, and retrieving the most frequent element efficiently.
Use a hash map to count frequencies of elements.
Maintain a stack for each frequency level to store elements.
When pushing, update the frequency and push to the corresponding stack.
When popping, retrieve from the highest frequency stack and update counts.
Example: Push(5), Push(7), Push(5) results in frequency {5: 2, 7: 1}...
Calculate the minimum number of platforms needed at a train station based on arrival and departure times.
Sort arrival and departure times.
Use a two-pointer technique to track platforms needed.
Increment platform count on arrival and decrement on departure.
Example: For arrivals [10:00, 10:15] and departures [10:30, 10:45], 1 platform is needed.
Find the maximum sum of a circular subarray in a given array of integers.
Use Kadane's algorithm to find the maximum subarray sum in a non-circular manner.
Calculate the total sum of the array and apply Kadane's algorithm to find the minimum subarray sum.
The maximum circular subarray sum can be found as: max(max_subarray_sum, total_sum - min_subarray_sum).
Example: For array [1, -2, 3, -2], max subarray sum is 3, and...
Query to find nth highest salary in SQL
Use the ORDER BY clause to sort the salaries in descending order
Use the DISTINCT keyword to eliminate duplicates
Use LIMIT and OFFSET to get the nth highest salary
To take the Rajasthani Shoe business from online to offline, a multi-channel approach can be adopted.
Establish physical stores in key locations to increase accessibility and visibility.
Collaborate with local retailers or distributors to expand the offline presence.
Organize pop-up shops or participate in trade shows to showcase the products.
Implement effective marketing strategies to create awareness about the offl...
Apple i-Pad is a success.
The i-Pad has sold over 500 million units worldwide.
It has revolutionized the tablet market and set the standard for other companies.
The i-Pad has been used in various industries such as education, healthcare, and entertainment.
Apple continues to release new and improved versions of the i-Pad, showing its success.
The i-Pad has also contributed significantly to Apple's revenue and profits.
Design a feature for ad publishers to define restrictions on ad content.
Create a user-friendly interface for publishers to set their content restrictions.
Allow publishers to select specific categories of restricted content (e.g. porn, alcohol, violence).
Implement a keyword-based filtering system to identify restricted content.
Provide an option for publishers to upload custom lists of restricted keywords.
Offer a pr...
The sort order algorithm for an e-commerce search page determines the arrangement of products based on relevance to the search query.
The algorithm should consider factors like product popularity, customer ratings, and relevance to the search query.
It should prioritize products that closely match the search query and have higher ratings or popularity.
The algorithm can also take into account other factors like price...
InMobi Interview Experiences
35 interviews found
Anonymous
Interview Questionnaire
6 Questions
- Q1. Given a linked list of integers, remove all duplicates
- Ans.
Remove all duplicates from a linked list of integers
Traverse the linked list and keep track of seen values using a hash set
If a value is already in the hash set, remove the node from the linked list
Time complexity: O(n), Space complexity: O(n)
- Q2. Implement a queue using stack
- Ans.
Implement a queue using stack
Use two stacks, one for enqueue and one for dequeue
When enqueueing, push onto the enqueue stack
When dequeueing, pop from the dequeue stack
If the dequeue stack is empty, transfer all elements from enqueue stack to dequeue stack
- Q3. To write a simple program which explains all the concepts of multithreading and explain it to him considering him a layman
- Q4. To design a class which has two random numbers and a mathematical operation in between them. If the user answers correctly, then a new question comes, otherwise the user tries the answering the same thing ...
- Ans.
Design a class for a math quiz game with random numbers, timer, score, and retry option.
Create a class with two random number generators and a random mathematical operation
Implement a timer and score tracker
If user answers correctly, generate a new question, else allow user to retry
Examples of mathematical operations: addition, subtraction, multiplication, division
Examples of retry options: allow user to see correct an...
- Q5. Given two strings, you need to transform one into the other. You can only transform 1 character at a time. The string formed after each character change should be a recognised word in the English language....
- Ans.
A function to transform one string into another by changing one character at a time, ensuring each transformation results in a valid English word.
Use a breadth-first search algorithm to explore all possible transformations
Create a dictionary of valid English words to check against
Track visited words to avoid repeating transformations
Return the shortest path of transformations from the starting string to the target stri...
- Q6. Given a matrix of n*n, print all the paths from 0,0 to n,n. You can either increase the x-coordinate one at a time or the y co-ordinate. Decreasing co-ordinates or gong diagonally is not allowed
- Ans.
Print all paths from 0,0 to n,n in a matrix of n*n by increasing x or y coordinate.
Use recursion to traverse through all possible paths
At each step, check if moving right is possible, if yes, move right and add 'R' to path
Similarly, check if moving down is possible, if yes, move down and add 'D' to path
If current position is (n-1, n-1), print the path
Backtrack to previous position and remove last added direction from p...
Interview Preparation Tips
Experience: It was hosted on Hackerrank. MCQ’s are all technical questions and also have negative marking (+1,-0.25). We had 20 minutes to do the 25 MCQ’sThe coding questions were:1. Given an array of integers and a number, count the total number of subsets of the array with sum equal to the number. (15 minutes)2. Given an array of integers, you need to check if its an arithmetic progression, geometric progression or fibonacci series. You then need to return the next number in the series or -999 if the given numbers does not follow any of the above series. The fibonacci series need not start with 0. A valid fibonacci series could be 8,9,17 (25 minutes)
Round: Technical Interview
Experience: She asked me to design a database. 1 table for employees, another for department. Initially 1 employee could be in just 1 department but each department has multiple employees. Then she changed it such that each employee could be in many departments and each department can have multiple employees. Then she asked me to write a simple query to list all the employees that belonged to a specific department.
General Tips: Be frank, be honest with your interviewer. If you are not comfortable in 1 topic, tell your interviewer honestly. Do well in other areas. Look for hints from the interviewer if you get stuck. They want to see how you approach a problem.
College Name: NA
Skills evaluated in this interview
Swastik Pandey
I applied via Referral and was interviewed in Nov 2024. There was 1 interview round.
(4 Questions)
- Q1. Find length of longest substring, without repeating charecters
- Q2. Implement a custom method for Memoization
- Q3. What is this keyword, and follow up questions were asked on this
- Q4. Deep copy and shallow copy
abishek saju
(1 Question)
- Q1. Why do you want to work here
(1 Question)
- Q1. Explain your previous work experience
(2 Questions)
- Q1. Optimisation techniques/ vanilla js
- Q2. Polyfill of promise
- Ans.
Polyfill of promise is a code that adds support for promises in older browsers.
Polyfill is used to fill in the gaps in browser support for certain features.
For promises, a polyfill can be used to provide support in older browsers that do not natively support promises.
Popular promise polyfills include 'es6-promise' and 'bluebird'.
Skills evaluated in this interview
Anu S M
Leetcode easy-medium
(2 Questions)
- Q1. What is Cyber Security and information security?
- Ans.
Cyber security is the practice of protecting systems, networks, and data from digital attacks.
Cyber security involves implementing measures to prevent unauthorized access, data breaches, and other cyber threats.
It includes technologies, processes, and practices designed to protect networks, devices, programs, and data from attack, damage, or unauthorized access.
Examples of cyber security measures include firewalls, ant...
- Q2. What are the types of encryption?
- Ans.
Types of encryption include symmetric encryption, asymmetric encryption, and hashing.
Symmetric encryption: Uses the same key for both encryption and decryption, examples include AES and DES.
Asymmetric encryption: Uses a pair of public and private keys for encryption and decryption, examples include RSA and ECC.
Hashing: Converts data into a fixed-size string of bytes, examples include MD5 and SHA.
Skills evaluated in this interview
(1 Question)
- Q1. General Understanding of Ad Tech space. And Gernal Marketing & Digital Marketing Questions. CRM related Questions.
I applied via Referral and was interviewed in May 2024. There were 2 interview rounds.
(1 Question)
- Q1. Max circular subarray sum
- Ans.
Find the maximum sum of a circular subarray in a given array of integers.
Use Kadane's algorithm to find the maximum subarray sum in a non-circular manner.
Calculate the total sum of the array and apply Kadane's algorithm to find the minimum subarray sum.
The maximum circular subarray sum can be found as: max(max_subarray_sum, total_sum - min_subarray_sum).
Example: For array [1, -2, 3, -2], max subarray sum is 3, and circ...
(2 Questions)
- Q1. Max frequency stack
- Ans.
Implement a stack that supports push, pop, and retrieving the most frequent element efficiently.
Use a hash map to count frequencies of elements.
Maintain a stack for each frequency level to store elements.
When pushing, update the frequency and push to the corresponding stack.
When popping, retrieve from the highest frequency stack and update counts.
Example: Push(5), Push(7), Push(5) results in frequency {5: 2, 7: 1}.
- Q2. Minimum no of platforms required
- Ans.
Calculate the minimum number of platforms needed at a train station based on arrival and departure times.
Sort arrival and departure times.
Use a two-pointer technique to track platforms needed.
Increment platform count on arrival and decrement on departure.
Example: For arrivals [10:00, 10:15] and departures [10:30, 10:45], 1 platform is needed.
I applied via Referral and was interviewed in Mar 2024. There was 1 interview round.
(2 Questions)
- Q1. Tell me about a tough situation with a colleague or manager
- Q2. Tell me about a challenge in your life and how you overcame it
I applied via Referral and was interviewed in Mar 2024. There were 2 interview rounds.
(1 Question)
- Q1. Basic Sql, python and Excel questions.
(1 Question)
- Q1. Situational Interview round
(1 Question)
- Q1. Explain the product you worked on in your previous company
(1 Question)
- Q1. More Product sense question
Interview Preparation Tips
(1 Question)
- Q1. Great picture with the best
(1 Question)
- Q1. Greater Noida west bengal
(1 Question)
- Q1. Great job Group manager
(1 Question)
- Q1. Great Great Great Great
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