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Cisco Software Engineer Interview Questions

The questions to prepare for a Cisco Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

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Polling vs Interrupt-Driven I/OEasy

Compare polling and interrupt-driven I/O, including CPU usage, latency, complexity, and when each approach is appropriate in embedded systems.

basicsEmbedded Systemsinterrupts
Cisco
Generate Fizz Buzz Sequence
Easy

Generate the Fizz Buzz output from 1 to n using loop logic, divisibility checks, and string construction.

MathArraysStrings
Recently asked
Cisco
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Implement a Networking Protocol with OOPHard

Tests ability to design and implement protocol logic using object-oriented principles.

Networkingoop
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Cisco
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Polling vs Interrupt-Driven I/O
Medium

Assesses understanding of I/O models and their performance tradeoffs.

interrupts
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Cisco
Freed Pointer Access Behavior
Hard

Evaluates deep understanding of memory safety, undefined behavior, and OS/runtime effects.

memory management
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Cisco
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Using AI Tools at Work
Medium

Assesses how you apply AI tools responsibly to improve engineering productivity and quality.

implementation
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Cisco
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Virtual Table Definition
Medium

Assesses your SQL and data modeling fundamentals for understanding virtualized views.

sql
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Reader Writer Pipeline Design
Medium

Tests your ability to design concurrent data processing pipelines safely and efficiently.

Recently asked
Cisco
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