A multithreaded web server wishes to keep track of the number of requests it services (known as hits). Consider the two following
strategies to prevent a race condition on the variable hits. The first
strategy is to use a basic mutex lock when updating hits:

int hits;
mutex lock hit lock;

hit lock. acquire();
hits++;
hit lock. release();

A second strategy is to use an atomic integer:

atomic t hits;
atomic inc(&hits);

Explain which of these two strategies is more efficient.

Solution: the categorization of functional and non-functional requirement are as follows: some of the more typical functional requirements include: • business rules• transaction corrections, adjustments and cancellations• administrative functions• authentication• authorization levels• audit tracking• external interfaces• certification requirements• reporting requirements• historical data• legal or regulatory requirementswhile,some typical non-functional requirements are: • performance – for example response time, throughput, utilization, static volumetric• scalability• capacity• availability• reliability• recoverability• maintainability• serviceability• security• regulatory• manageability• environmental• data integrity• usability• interoperability

Ihad the same question but i tested it out and it didn't work.