Mobikwik Interview Questions, Process, and Tips

Q1. Questions based on DSA
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Q1. Java specific Interview
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Q1. Hiring Manager Interview
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Q1. Tell about your experience and qualifications ? What is your weekness ? What is customer support ?
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Q1. Introduction and work experience
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Q1. Roles and responsibilities, comm skills,
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Round duration - 90 minutes
Round difficulty - Medium

Started with projects discussion and internships and moved forward with coding problems.
It started at around 6:00 PM and lasted for 90 minutes approximately
The interviewer was very cool, he even gave me some tips on improving myself further at the end of the interview.

Q1. 
Longest Substring with At Most K Distinct Characters
Given a string S of length N and an integer K, find the length of the longest substring that contains at most K distinct characters.
Input:
The first...read more
Ans. 
Find the length of the longest substring with at most K distinct characters in a given string.
• Use a sliding window approach to keep track of the characters and their counts within the window.

• Maintain a hashmap to store the characters and their frequencies.

• Update the window size and characters count as you iterate through the string.

• Return the maximum window size encountered for each test case.
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Q2. 
Maximum Frequency Number Problem Statement
Given an array of integers with numbers in random order, write a program to find and return the number which appears the most frequently in the array.
If multip...read more
Ans. 
Find the number with the maximum frequency in an array of integers.
• Iterate through the array and keep track of the frequency of each number using a hashmap.

• Find the number with the maximum frequency and return it.

• If multiple elements have the same maximum frequency, return the one that appears first.
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Q3. 
Ninja and Bombs Problem Statement
Ninja wants to travel from his house to his best friend's house. The locations of the houses are on a 2D coordinate plane, where Ninja's house is located at the origin (0...read more
Ans. 
Determine if Ninja can reach his friend's house with even x-coordinate without using modulus operator.
• Check if the x-coordinate is even or odd by using bitwise AND operation with 1.

• Return 1 if x-coordinate is even, else return 0.

• Handle multiple test cases by iterating through each input.
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Round duration - 60 minutes
Round difficulty - Easy

I was asked a coding question then, a system design question and some basic operating systems and oops questions

Q1. 
Find Duplicates in an Array
Given an array ARR of size 'N', where each integer is in the range from 0 to N - 1, identify all elements that appear more than once.
Return the duplicate elements in any orde...read more
Ans. 
Find duplicates in an array of integers within a specified range.
• Iterate through the array and keep track of the count of each element using a hashmap.

• Return elements with count greater than 1 as duplicates.

• Time complexity can be optimized to O(N) using a set to store seen elements.
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Q2. Can you design a Google Search Engine?
Ans. 
Designing a Google Search Engine involves creating a web crawler, indexing system, and ranking algorithm.
• Develop a web crawler to discover and retrieve web pages.

• Implement an indexing system to store and organize the content of web pages.

• Design a ranking algorithm to determine the relevance of search results.

• Include features like autocomplete, spell check, and personalized search results.

• Optimize for speed and scalabil...read more
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Q1. Tell me something about yourself
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Q1. Basic questions on OWASP top 10
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Q2. How to exploit/test for the same
Ans. 
To exploit/test for vulnerabilities, use penetration testing tools and techniques to simulate attacks and identify weaknesses.
• Use vulnerability scanners to identify potential vulnerabilities

• Conduct penetration testing to simulate attacks and identify weaknesses

• Perform social engineering tests to assess human vulnerabilities

• Use fuzzing techniques to identify software vulnerabilities

• Conduct code reviews to identify poten...read more
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Q3. Difference between SSRF & CSRF
Ans. 
SSRF is an attack that allows an attacker to send a crafted request from a vulnerable web application. CSRF is an attack that tricks a victim into performing an action on a website without their knowledge or consent.
• SSRF stands for Server-Side Request Forgery while CSRF stands for Cross-Site Request Forgery.

• SSRF allows an attacker to send a request from a vulnerable server to a third-party server while CSRF tricks a vi...read more
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Q4. Some questions regarding CSP, CORS
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Q5. More on response headers, cookies, secure, httpOnly and secure flag etc.
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Q1. Closing formalities regarding the offer letter, joining
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