Freecharge Team Lead Interview Questions and Answers

Q1. Find first non-repeating character in a string
Ans. 
Find the first non-repeating character in a string
• Create a hashmap to store the frequency of each character in the string

• Iterate through the string and check the frequency of each character

• Return the first character with frequency 1
Answered by AI
Add your answer
Q2. Implement stack in a way so that I will get min at any step in 0(1)
Ans. 
Use an additional stack to keep track of the minimum value at each step.
• Create a stack to store the actual values.

• Create another stack to store the minimum value at each step.

• When pushing a new value, compare it with the top of the minimum stack and push the smaller value.

• When popping a value, also pop from the minimum stack.

• To get the minimum value at any step, simply peek at the top of the minimum stack.
Answered by AI
View 1 more answer

Q1. Print even odd with different threads
Ans. 
Print even and odd numbers using different threads
• Create two threads, one for printing even numbers and one for printing odd numbers

• Use synchronization mechanisms like mutex or semaphore to ensure proper ordering of output

• Example: Thread 1 prints even numbers (2, 4, 6, ...) and Thread 2 prints odd numbers (1, 3, 5, ...)
Answered by AI
Add your answer
Q2. Executor service, java 8, spring boot
Add your answer

Q1. Design LRU cache
Add your answer
Q2. Design flight booking system
Ans. 
Design a flight booking system for easy and efficient booking process.
• Allow users to search for flights based on destination, date, and number of passengers.

• Provide options for users to select preferred flight times, airlines, and seating preferences.

• Include secure payment processing for booking confirmation.

• Implement a user-friendly interface with clear instructions and easy navigation.

• Offer features like flight statu...read more
Answered by AI
Add your answer

Q1. Aap kaha kaam kiye hoo kitna year ka experience hai aapka
Ans. 
I have over 5 years of experience in software development, working with various technologies and leading teams to successful project completions.
• Worked at XYZ Corp for 3 years as a Software Developer, focusing on web applications.

• Led a team of 5 at ABC Ltd for 2 years, successfully delivering multiple projects on time.

• Experience with technologies like Java, Python, and React, enhancing team productivity.
Answered by AI
View 1 more answer
Q2. Kitna year ka experience hai aapko
Ans. 5 year for sales team leader
Answered by guiltypineapple
View 1 more answer
Q3. Aapki city konsi hai
Add your answer

Q1. Aap freecharge ke bare me kya jante hoo
Ans. Freecharge ek maatra aise company hai jiska type axis Bank se hai
Answered by guiltypineapple
Add your answer
Q2. Agar hamari company ka soundbox
Add your answer

Coding, stack and string

Q1. Java 8, collection, multithreading
Add your answer