Go – Index

Welcome to the complete Go resource centre. Refresh the essentials first, then grind the placement tracks.

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Revision Guide

Interview-focused revision of everything you need — from goroutines to gotchas.

• Part 1: Types, Zero Values & Pointers Type system, zero values, pointers vs values, structs, and runes.
• Part 2: Slices, Maps & Interfaces The slice/map mental model, ooding, receivers, and interfaces.
• Part 3: Goroutines, Channels & Control Flow Concurrency primitives, select, defer/panic/recover, and control flow.
• Part 4: Errors, Sync & Top Gotchas Error handling, sync utilities, nil vs empty, tooling, and the gotcha sheet.

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Top 10 Questions

• Top 10 Go Questions - Part 1 The 10 most frequently asked Go placement questions.

Top 25 Questions

• Top 25 - Part 1 Essential core Go concepts for placement.
• Top 25 - Part 2 Intermediate Go concepts and interview patterns.

Top 50 Questions

• Top 50 - Part 1 First 15 of the most asked Go questions.
• Top 50 - Part 2 Middle 15 of the top 50 Go questions.
• Top 50 - Part 3 Final 20 advanced Go questions.

Output Questions

• Output Questions - Part 1 fmt, div, slices, constant math output puzzles.
• Output Questions - Part 2 Append semantics, receivers, defer, and interface output.

Comparison Questions

• Comparison Questions - Part 1 ==, string/rune compare, nil slice vs empty, same-address pointers.
• Comparison Questions - Part 2 Map keys, channels identity, struct vs slice equality, comparability rules.

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Section-wise Q&A

• 1. Slices & Maps Make vs literals, append growth, map internals, and gotchas.
• 2. Channels & Goroutines Goroutine basics and channel patterns.
• 3. defer, panic & recover LIFO defers, panic propagation, recover usage.
• 4. sync & Concurrency Mutex, WaitGroup, atomic, and concurrency safety.
• 5. Interfaces & Methods Interface satisfaction, value vs pointer receivers, zero interface.
• 6. Types & Tooling Types, go mod, vet, testing, and the toolchain.