eBay Interview Questions and Answers

Scaling a system involves increasing its capacity to handle more load or users.

• Identify bottlenecks and optimize them

• Use load balancing to distribute traffic evenly

• Implement caching to reduce database load

• Horizontal scaling by adding more servers

• Vertical scaling by upgrading hardware

Three weaknesses include lack of experience in a specific technology, difficulty with time management, and tendency to overthink solutions.

• Lack of experience in a specific technology (e.g. not familiar with a certain programming language or framework)

• Difficulty with time management (e.g. struggling to prioritize tasks effectively)

• Tendency to overthink solutions (e.g. spending too much time analyzing a problem befo...read more

I would quarantine the damaged product, document the issue, and notify the appropriate personnel.

• Quarantine the damaged product to prevent it from being used or shipped

• Document the issue by taking photos, writing a report, and recording details such as product ID and location

• Notify the appropriate personnel such as the production team, quality control manager, and supplier

• Investigate the root cause of the damage t...read more

Merge sort algorithm can be used to sort the balls in each basket and then merge the sorted baskets.

• Apply merge sort algorithm to sort the balls in each basket

• Merge the sorted baskets to get the final sorted order

• Use recursion to implement merge sort

• Time complexity of merge sort is O(nlogn)

Program in C to implement a function 'sum' that performs integer addition, float addition, and string concatenation based on the input arguments.

• Define the function 'sum' with two arguments of type 'void *'.

• Use 'if-else' statements to check the data type of the arguments.

• Perform integer addition if both arguments are of type 'int'.

• Perform float addition if both arguments are of type 'float'.

• Concatenate the strings...read more

To delete 95,000 records with limited local memory, use batch processing and delete in chunks.

• Use batch processing to delete records in chunks

• Delete records in descending order of their IDs to avoid index fragmentation

• Commit the transaction after deleting each batch to avoid long-running transactions

• Consider archiving the deleted records instead of permanently deleting them