Amazon Interview Questions

Q.41 Easy Amazon

Which protocol is used for secure data transmission over the internet?

A HTTP

B HTTPS

C FTP

D SMTP

Correct Answer: B. HTTPS

Explanation:

HTTPS (HTTP Secure) encrypts data in transit using SSL/TLS. Other protocols lack this encryption.

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Q.42 Easy Amazon

What does the SELECT * query do in SQL?

A Selects the first row

B Selects all columns from all rows

C Selects only the primary key

D Deletes all data

Correct Answer: B. Selects all columns from all rows

Explanation:

SELECT * retrieves all columns and rows from a table. * is a wildcard meaning 'all columns'.

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Q.43 Medium Amazon

A warehouse manager needs to pack boxes into containers. If 15 workers can pack 450 boxes in 6 hours, how many boxes can 20 workers pack in 8 hours, assuming the same productivity rate?

A 800 boxes

B 900 boxes

C 1000 boxes

D 1200 boxes

Correct Answer: A. 800 boxes

Explanation:

Rate per worker per hour = 450/(15×6) = 5 boxes/hour. For 20 workers in 8 hours = 20×8×5 = 800 boxes.

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Q.44 Medium Amazon

In a sequence: 2, 6, 12, 20, 30, __. What is the next number?

A 40

B 42

C 44

D 48

Correct Answer: B. 42

Explanation:

The pattern is n(n+1): 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42. Each term is the product of consecutive integers.

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Q.45 Easy Amazon

If a train travels 240 km in 4 hours and then 180 km in 3 hours, what is its average speed for the entire journey?

A 50 km/h

B 55 km/h

C 60 km/h

D 65 km/h

Correct Answer: C. 60 km/h

Explanation:

Total distance = 240 + 180 = 420 km. Total time = 4 + 3 = 7 hours. Average speed = 420/7 = 60 km/h.

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Q.46 Easy Amazon

Which of the following words is closest in meaning to 'CANDID'?

A Deceptive

B Frank

C Artificial

D Reserved

Correct Answer: B. Frank

Explanation:

CANDID means honest, frank, and straightforward. Frank (option B) is a direct synonym meaning honest and open.

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Q.47 Medium Amazon

A company's revenue grows by 25% in Year 1 and 20% in Year 2. If the initial revenue was ₹100 crore, what is the revenue after 2 years?

A ₹145 crore

B ₹150 crore

C ₹155 crore

D ₹160 crore

Correct Answer: B. ₹150 crore

Explanation:

After Year 1: 100 × 1.25 = ₹125 crore. After Year 2: 125 × 1.20 = ₹150 crore.

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Q.48 Medium Amazon

In a circular arrangement of 8 people, if person A sits at a fixed position, how many distinct arrangements are possible for the remaining 7 people?

A 7!

B 6!

C 8!

D 7! / 2

Correct Answer: A. 7!

Explanation:

With one person fixed in circular arrangement, the remaining 7 people can be arranged in 7! ways (avoiding counting rotations as different).

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Q.49 Easy Amazon

Read the passage and answer: 'Amazon's supply chain relies on predictive analytics to forecast demand. This AI-driven approach reduces inventory costs and improves delivery times.' Which statement best captures the main idea?

A Amazon uses artificial intelligence only for cost reduction

B Predictive analytics helps Amazon forecast demand, reduce costs, and improve delivery efficiency

C Amazon's supply chain is entirely automated

D Inventory management is the primary focus of Amazon's strategy

Correct Answer: B. Predictive analytics helps Amazon forecast demand, reduce costs, and improve delivery efficiency

Explanation:

The passage states that AI-driven predictive analytics serves three purposes: forecasting demand, reducing inventory costs, and improving delivery times. Option B accurately captures all these points.

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Q.50 Hard Amazon

A system processes 1000 requests per second. If 8% of requests fail and need retry, and each retry takes 2 seconds, approximately how many total seconds are needed to process 10,000 requests including retries (assuming sequential processing)?

A 10 seconds

B 11.6 seconds

C 12.5 seconds

D 13.8 seconds

Correct Answer: B. 11.6 seconds

Explanation:

10,000 requests at 1000/sec = 10 seconds. Failed requests = 10,000 × 0.08 = 800. Retry time = 800 × 2/1000 = 1.6 seconds. Total ≈ 10 + 1.6 = 11.6 seconds.

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