After a winter night with sub-zero temperatures, Lukas discovers a crack in a water pipe. 
An inspection shows that the crack began inside the pipe and forced its way outward, and the pipe material is confirmed to be standard and undamaged. 
No heater failure or external force is identified, and nearby houses experienced the same duration of freezing conditions. 
Engineers note that freezing alone does not always damage pipes, suggesting another factor was involved. 
They suspect that the failure is linked to how the freezing process interacted with the pipe’s constraints. 

Which condition most precisely explains why freezing created enough internal pressure to crack the pipe in Lukas’s house, but not in the neighbouring houses? 

After a freezing winter night, Lukas discovers that a pipe inside his wall has cracked. An inspection reveals no heater failure, no pipe defect and no external damage. Neighbours with the same house design did not experience this problem.  
The only difference was a small habit Lukas followed before going to sleep.  

Lukas wants to change just one behaviour to prevent this from happening again. 

Which change most directly explains why the neighbours’ pipes did not crack? 

Scenario 

For an international mobile gaming championship, a company must choose one primary server. 

Unlike earlier tests, the evaluation system uses dynamic decision rules, where some conditions override others depending on performance thresholds. 

Four servers—Orion, Vega, Nova and Atlas— were tested under identical peak-load conditions. 

 Evaluation Logic 

1.  Critical Failure Rule
   Any server that records eight or more lag spikes during testing is immediately rejected, regardless of its performance in other parameters.
2. Latency Priority Rule
   From the remaining servers, those with an average response time of 95 ms or less are classified as stable.
3. Selection Logic
   • If exactly one server is classified as stable, that server is selected.
   • If more than one server is classified as stable, the server with the lowest number of player dropouts is selected.
   • If no server is classified as stable, the server with the fewest lag spikes is selected.

Scenario 

A mobile gaming company wants to select one server to  host a national-level tournament. 

During testing, four servers—Alpha, Beta, Gamma,and Delta—were monitored under peak traffic conditions. 

The company follows a strict decision protocol, rather than a score-based comparison. 

Decision Protocol Used 

Observed Test Results 

Question 

According to the company’s deployment protocol, which server will be selected for the tournament?