A machine learning model achieves 99% accuracy on a dataset where 99% of samples belong to class A. This is an example of:
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53%
Overfitting
13%
Underfittng
12%
Regularization failure
23%
The accuracy paradox
What is the primary function of a CDN (Content Delivery Network) edge cache?
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20%
Encrypting traffic end-to-end
60%
Serving content from servers geographically close to users
9%
Load balancing between application servers
11%
Resolving DNS queries faster
Which TCP congestion control mechanism causes the sender to halve its congestion window upon detecting packet loss via timeout?
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15%
Slow start
50%
Congestion Avoidance
25%
Fast retransmit
10%
Fast recovery
Which algorithmic technique does dynamic programming primarily rely on?
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34%
Divide and conquer with no overlapping subproblems
17%
Greedy local choices at each step
23%
Backtracking with pruning
26%
Memoization of overlapping subproblems
👍2
Which scheduling algorithm can lead to the 'convoy effect', where short processes wait behind a long one?
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16%
Round Robin
53%
FCFS(First-Come, First-Served)
11%
Shortest Job First
21%
Priority Scheduling
In public-key cryptography, if Alice wants to send Bob a message only Bob can read, which key does she encrypt with?
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38%
Alice's private key
23%
Alice's public key
23%
Bob's private key
15%
Bob's public key
👍1
In the context of neural networks, what does 'dropout' regularization do during training?
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41%
Randomly deactivates a fraction of neurons on each forward pass
43%
Removes neurons with the lowest weights permanently
11%
Reduces the learning rate when loss plateaus
5%
Clips gradient norms to prevent explosion
🔥2
What is a 'closure' in programming?
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27%
A function that cannot be called outside its module
36%
A function bundled with references to its surrounding lexical scope
23%
A class with no public methods
14%
A pattern for closing database connections
❤1👍1
What is the primary trade-off of using an event-driven, single-threaded architecture (like Node.js) compared to multi-threaded servers?
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49%
Handles I/O-bound concurrency efficiently but struggles with CPU-bound tasks
24%
Cannot handle multiple requests simultaneously
11%
Cannot use TLS/SSL
16%
Uses more memory per connection
❤2
In a confusion matrix, 'precision' is calculated as:
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26%
TP / (TP + FN)
42%
TP / (TP + FP)
19%
TN / (TN + FP)
13%
TP / (TP + TN)
What is 'thrashing' in virtual memory systems?
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8%
Excessive CPU context switching between processes
67%
A state where the OS spends more time paging than executing processes
17%
Memory fragmentation causing allocation failures
8%
Cache invalidation storms across cores
Which statistic is least affected by extreme outliers?
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0%
Mean
0%
Sum
0%
Average
100%
Median