JOBSEEKER?

Consider the struct UserInfo, which is used in a performance critical sub-system.

Currently, on a system:

  • A long long takes 8 bytes
  • A pointer, a float, and an int take 4 bytes each
  • A short takes 2 bytes
  • A char takes 1 byte

The struct takes 48 bytes of space. Rearrange the struct, without removing, renaming, or changing the type of the members, so that it uses less memory. The code uses pointers to struct members, so struct should be properly aligned.



  •   The UserInfo struct takes less than 48 bytes of memory: Wrong answer
  •   The UserInfo struct takes less than 33 bytes of memory: Wrong answer
  •   The UserInfo struct is properly aligned: Wrong answer

Tags
C Data Structure Alignment Memory Management New Public
Hard

7min

Would you like to see our other questions?

We have 1000+ premium hand-crafted questions for 160+ job skills and 20+ coding languages. We prefer questions with small samples of actual work over academic problems or brain teasers.

Visit our question library
Private Concierge

Send us an email with an explanation of your testing needs and a list of candidates. We will create an appropriate test, invite your candidates, review their results, and send you a detailed report.

Contact Private Concierge

Would you like to see our tests? The following tests contain C related questions:
On the TestDome Blog

Screening Applicants: The Good, the Bad and the Ugly

Since we’re all biased and we use incorrect proxies, why not just outsource hiring to experts or recruitment agencies? After all, they’ve been screening people for many years, so they must know how to do it right?

Not really. I was surprised to discover that many experts disagree with each other. Everybody praises their pet method and criticizes the others. Many of these methods look legitimate, but are based on...

Dashboard Start Trial Sign In Home Tour Tests Questions Pricing For Jobseekers