Zepto Interview Questions, Process, and Tips

Calculate sum of large numeric comma separated strings without converting to integers.

• Split the strings by comma to get individual numbers

• Iterate from right to left and add digits, carrying over if necessary

• Maintain correct position of commas in the output string

I have taken various initiatives in my career to improve processes and drive innovation.

• Led a team to implement a new agile development process, resulting in faster delivery of products

• Introduced automated testing tools to improve software quality and reduce manual effort

• Organized coding workshops for junior developers to enhance their skills and knowledge

• Initiated a mentorship program to help new hires acclimate to th

I own 5 microservices that handle traffic at a scale of 10,000 requests per minute.

• I own 5 microservices

• They handle traffic at a scale of 10,000 requests per minute

I have consistently gone above and beyond in my work by taking on additional projects and working extra hours when needed.

• Volunteering to lead a high-priority project that required long hours and weekend work

• Staying late to troubleshoot and resolve a critical issue before a major deadline

• Taking on extra tasks to help a team member who was overwhelmed with their workload

Seeking new challenges and growth opportunities.

• Desire for career advancement

• Looking for new challenges

• Seeking better work-life balance

• Company restructuring or changes in management

Negative testcases for cart value less than 1000

• Add a product with a price less than 1000 to the cart

• Remove all products from the cart and check if the total value is less than 1000

• Add multiple products to the cart but ensure the total value is less than 1000

HTTP status codes are standardized codes used to indicate the result of a HTTP request.

• 1. 2xx - Success: Request was successful (e.g. 200 OK)

• 2. 3xx - Redirection: Further action needs to be taken (e.g. 301 Moved Permanently)

• 3. 4xx - Client Error: Request cannot be fulfilled (e.g. 404 Not Found)

• 4. 5xx - Server Error: Server failed to fulfill a valid request (e.g. 500 Internal Server Error)

To check backward compatibility in API after BE changes are deployed on PROD, perform regression testing on existing functionalities.

• Perform regression testing on existing API functionalities to ensure they still work as expected after BE changes

• Check if any existing API endpoints have been deprecated or modified due to BE changes

• Verify if any new API endpoints have been added and test their functionality

• Ensure that th...read more

GET retrieves data, POST submits data, PUT updates data, PATCH partially updates data

• GET is used to retrieve data from a server

• POST is used to submit data to a server

• PUT is used to update existing data on a server

• PATCH is used to partially update existing data on a server

Use network monitoring tools and simulate different network conditions to test network latency in mobile apps.

• Use network monitoring tools like Wireshark or Charles Proxy to analyze network traffic and identify latency issues.

• Simulate different network conditions (3G, 4G, WiFi, etc.) using tools like Network Link Conditioner on iOS or Android Emulator on Android.

• Measure latency by sending requests to a server and calcu...read more

POST method is more secure than GET method for transmitting sensitive data.

• POST method sends data in the request body, making it more secure as the data is not visible in the URL.

• GET method sends data in the URL, which can be visible in browser history, server logs, and can be easily intercepted.

• POST method is recommended for transmitting sensitive information like passwords, credit card details, etc.

• GET method is comm...read more

Update the name of employee with 3rd highest salary in SQL

• Use a subquery to find the 3rd highest salary

• Join the subquery with the EMPLOYEE table on salary to get the employee name

• Use the UPDATE statement to update the name of the employee

A RACE condition is a situation in which the outcome of a program depends on the order of execution of its components.

• Occurs in concurrent programming when multiple threads access shared data and the outcome depends on the order of execution

• Can lead to unpredictable behavior and bugs in the program

• Example: Two threads trying to increment the same variable simultaneously can result in incorrect values due to race condit