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Which SQL operation usually becomes slower as a table grows if no suitable index exists?
Which structure is typically used internally for Breadth-First Search (BFS)?
Which loop is most appropriate when the number of iterations is unknown beforehand?
Which component is most commonly added to absorb sudden spikes in workload?
A team frequently changes business requirements. Which design characteristic becomes most valuable?
Which situation most strongly suggests a need for refactoring?
What is the main advantage of using a Python generator instead of returning a list?
Hash maps provide near O(1) average lookup time by mapping keys directly to storage locations.
A dataset contains ages ranging from 1 to 100 and incomes ranging from 100 to 1,000,000. Why might scaling be useful?
A model achieves 99% accuracy detecting fraud, but only 1% of transactions are actually fraudulent. What metric should you examine next?
Two transactions modify the same record simultaneously and produce inconsistent results. What issue occurred?
What is the output of this code?
x = [1, 2, 3]
y = x y.append(4) print(len(x))
A website loads slowly because it requests 500 small images. What is the main issue?
Why is a model evaluated on data it has never seen before?
