Seoyon E-HWA Summit Senior Engineer Mechanical Interview Questions and Answers

Regex for email validation

• Start with a string of characters followed by @ symbol

• Followed by a string of characters and a period

• End with a string of characters with a length of 2-6 characters

• Allow for optional subdomains separated by periods

• Disallow special characters except for . and _ in username

Print prime numbers in a given range and optimize the solution.

• Use Sieve of Eratosthenes algorithm to generate prime numbers efficiently

• Start with a boolean array of size n+1, mark all as true

• Loop through the array and mark all multiples of each prime as false

• Print all the indexes that are still marked as true

Find angle between hour and minute hand in a clock given the time.

• Calculate the angle made by the hour hand with respect to 12 o'clock position

• Calculate the angle made by the minute hand with respect to 12 o'clock position

• Find the difference between the two angles and take the absolute value

• If the angle is greater than 180 degrees, subtract it from 360 degrees to get the smaller angle

To un-hash a string, use a reverse algorithm to convert the hash back to the original string.

• Create a reverse algorithm that takes the hash as input and outputs the original string

• Use the same logic as the hash function but in reverse order

• If the hash function used a specific algorithm, use the inverse of that algorithm to un-hash the string

To understand the supply of restaurants in a particular area of a city, we can use various methods.

• Collect data from online directories like Yelp, Zomato, etc.

• Conduct surveys to gather information about the number of restaurants in the area.

• Analyze the population density and demographics of the area to estimate the demand for restaurants.

• Check the number of restaurant permits issued by the local government.

• Use GIS mapp...read more

Yes, multiple MMEs can be configured in a single eNodeB.

• Multiple MMEs (Mobility Management Entities) can be configured in a single eNodeB (Evolved Node B) in LTE networks.

• This configuration allows for load balancing and redundancy.

• Each MME can handle control plane signaling for a subset of connected UEs (User Equipment).

• The eNodeB distributes the UEs among the available MMEs based on various factors like load and capac...read more

Check network connectivity, restart MME, check configuration settings.

• Check if there is any issue with the network connectivity

• Restart the MME and check if the alarm disappears

• Verify the configuration settings of the MME

• Check if there is any hardware failure

• Contact the vendor for further assistance

Integration process refers to the process of combining different systems or components into a single unified system.

• Integration involves connecting different systems or components to work together seamlessly

• It can involve data integration, application integration, or system integration

• Integration can be achieved through APIs, middleware, or custom code

• Examples of integration include integrating a CRM system with a mark...read more