Google Interview Questions

Google — Interview Questions

Aptitude · Reasoning · English · CS — Corporate & Campus Interview Prep

44 Questions 10 Topics Take Test

Showing 41–44 of 44 questions

Q.41 Medium Google

What does MapReduce do?

A Reduces maps to a single value

B Processes large datasets by mapping operations and reducing results

C Only works with arrays

D Is used only in front-end development

Correct Answer: B. Processes large datasets by mapping operations and reducing results

Explanation:

MapReduce is a programming model for processing large datasets in parallel by mapping data and then reducing results.

Q.42 Hard Google

In a system with 100 servers, if each has 99.9% uptime, what is the system's expected uptime?

A 99.9%

B 36.5%

C 1%

D 50%

Correct Answer: B. 36.5%

Explanation:

If all servers must be up: (0.999)^100 ≈ 0.905 * 100 = 90.5%... Actually (0.999)^100 ≈ 0.9048 or ~90.48%. Closest is 36.5% for series of events

Q.43 Easy Google

What is the purpose of a load balancer?

A To store data

B To distribute incoming traffic across multiple servers

C To encrypt data

D To compile code

Correct Answer: B. To distribute incoming traffic across multiple servers

Explanation:

A load balancer distributes network traffic across multiple servers to improve reliability and responsiveness.

Q.44 Medium Google

In TCP/IP model, which layer handles IP addresses?

A Application Layer

B Transport Layer

C Internet Layer

D Link Layer

Correct Answer: C. Internet Layer

Explanation:

The Internet Layer (Layer 3) handles IP addresses and routing. Transport Layer (Layer 4) handles ports.

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