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| 2 | Two transactions modify the same record simultaneously and produce inconsistent results. What issue occurred? | 67 |
| 3 | What is the output of this code?
x = [1, 2, 3]
y = x y.append(4) print(len(x)) | 284 |
| 4 | What does high variance usually indicate? | 84 |
| 5 | What problem was DNS primarily created to solve? | 82 |
| 6 | A website loads slowly because it requests 500 small images. What is the main issue? | 308 |
| 7 | Why is a model evaluated on data it has never seen before? | 93 |
| 8 | Why do databases use transactions? | 396 |
| 9 | A computer has multiple CPU cores, but a program only uses one core. Which change is MOST likely to improve performance? | 115 |
| 10 | What is the primary purpose of a load balancer? | 117 |
| 11 | A developer changes a single function and unexpectedly breaks five unrelated features. Which design issue is MOST likely present? | 380 |
| 12 | Which traversal of a Binary Search Tree produces sorted output? | 404 |
| 13 | What does the 'I' in ACID database properties stand for? | 1 728 |
| 14 | Which metric is most appropriate for evaluating a regression model's performance? | 1 378 |
| 15 | Which browser storage mechanism is automatically sent with HTTP requests? | 496 |
| 16 | What is a context switch? | 151 |
| 17 | Which data structure would you choose to implement an autocomplete feature? | 552 |
| 18 | Which statistic is least affected by extreme outliers? | 1 232 |
| 19 | What is 'thrashing' in virtual memory systems? | 160 |
| 20 | In a confusion matrix, 'precision' is calculated as: | 1 253 |
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