Software Engineer Quiz

Example Questions From the Test

• 1A service must run on several interchangeable instances behind a load balancer. Which design most directly supports horizontal scaling?
  • Keep service instances stateless where practical and place shared state in an appropriate external store
  • Store uploaded files only on one instance's local disk
  • Require every request to return to a manually selected server
  • Keep each user's session only in the memory of the first instance they contact
• 2Which design best demonstrates high cohesion?
  • A utility class handles authentication, invoices, email, and database backups
  • A module groups closely related invoice-calculation responsibilities
  • Every function can directly modify every part of the application state
  • One module changes whenever any feature in the system changes
• 14What is the typical time complexity of binary search on a sorted array?
  • O(n)
  • O(1)
  • O(log n)
  • O(n log n)