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Top 50 c/c++ Interview Questions

The most frequently asked c/c++ questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~8htotal time
79companies covered
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1
CodingStart here. 31 questions · ~281 min
Pointer Scenarios and OutputsHard
Practice

Simulate pointer reads, writes, aliasing, increments, and rebinding to determine each scenario's output.

c/c++code analysisCodingWoven By Toyota
Pointers in AssemblyHard
Practice

Simulate pointer addresses, dereferencing, stores, and pointer arithmetic in a small assembly-like interpreter.

c/c++Bit ManipulationCodingNVIDIA
Memory Management in Embedded SystemsMedium
Recently asked

Explain how to manage stack and heap usage, avoid fragmentation, and detect leaks in embedded systems.

memory managementc/c++Embedded SystemsQuectelHHyundai MOBIS AlabamaMercury Insurance
Compiler Optimization Levels ImpactMedium

Explain how compiler optimization levels change performance, code size, debugging behavior, and memory usage in embedded code.

c/c++compiler optimizationEmbedded SystemsDiversified Services Network
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2
Behavioral & Leadership3 questions · ~27 min
Owning Battery Life TradeoffsMedium

Tests ownership and prioritization in an embedded battery-life problem, including how the candidate makes tradeoffs and communicates decisions.

c/c++power optimizationEmbedded SystemsBosch Building TechnologiesFlukeHoneywell
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3
Security & Infrastructure13 questions · ~118 min
Heap vs StackEasy

Assesses understanding of memory layout and implications for performance and correctness.

memory managementc/c++RReal-Time Innovations (RTI)EveriGGreen Ping Solutions
Memory Management in C++Medium

Tests your understanding of C++ memory ownership, lifetimes, and safety practices.

c/c++technicalos internalsDrwBosch GroupMitel Networks
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4
More topics3 questions · ~27 min
Simulate Inheritance in CMedium

Evaluates your understanding of C language techniques for polymorphism.

c/c++JPL/NASANASA Jet Propulsion Laboratory
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