40083486
Description
Quiz by Eladio Rocha, updated 18 days ago
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Created by Eladio Rocha
18 days ago
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Question 1
Question
What is the purpose of back-of-the-envelope estimation in system design?
Answer
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To provide exact performance numbers for implementation.
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To estimate capacity or performance requirements using approximations.
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To simplify system architecture by eliminating redundancy.
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To benchmark the system against competitors.
Question 2
Question
Why is understanding the power of two important in system design calculations?
Answer
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It simplifies compression algorithms.
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It is the basis for all binary computations in distributed systems.
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It ensures correct calculations for data volume units.
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It is used to estimate latency in networking.
Question 3
Question
According to latency numbers, which of the following is the fastest operation?
Answer
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Disk seek
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L1 cache reference
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Reading 1 MB from the network
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Compressing 1K bytes with Zippy
Question 4
Question
If a system needs to store 100 TB of new data every day for 1 year, approximately how much storage will be required?
Answer
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36.5 PB
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10 PB
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3.65 PB
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100 PB
Question 5
Question
What is the peak QPS (Query Per Second) if the base QPS is 5,000?
Answer
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2,500
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5,000
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10,000
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7,500
Question 6
Question
What conclusion can be drawn about disk seeks compared to memory references?
Answer
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Disk seeks are faster than memory references.
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Disk seeks are significantly slower than memory references.
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Disk seeks and memory references have similar latencies.
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Disk seeks are not relevant for system design.
Question 7
Question
What is the approximate annual downtime for a system with 99.99% availability?
Answer
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52.60 minutes
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7.31 hours
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31.56 seconds
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5.26 minutes
Question 8
Question
If a system processes 200 million transactions per day, what is the approximate query per second (QPS)?
Answer
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1,000
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2,300
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10,000
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5,800
Question 9
Question
Why is compressing data before sending it over the internet recommended?
Answer
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It reduces compression time.
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It decreases network latency.
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It minimizes the amount of data transmitted, saving bandwidth.
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It ensures data integrity during transfer.
Question 10
Question
Which of the following tips is NOT recommended for back-of-the-envelope estimation?
Answer
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Use approximations for quick calculations.
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Label units clearly for clarity.
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Focus on solving complex equations accurately.
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Write down assumptions for reference.
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