Top 50 Operating Systems Interview Questions
The most frequently asked Operating Systems questions across all roles and companies, ranked by real interview frequency. Updated daily.
Classify an operating system as RTOS or GPOS from deterministic scheduling and deadline guarantees.
HCLTechHHoneywell Aerospace
Booz Allen HamiltonUse the Banker's algorithm to determine whether concurrent processes can complete without deadlock.
Hewlett Packard Enterprise | HPEProduce a deterministic Linux process startup order using topological sorting, or report a dependency cycle.
NVIDIASimulate buffer overflow control-flow hijacking and determine whether ASLR or DEP blocks exploitation.
MicrosoftUse graph traversal to identify process IDs involved in cycles within Windows or Linux parent process relationships.
MicrosoftReturn the foundational security concepts missing from a candidate's study list using set membership and canonical ordering.
MicrosoftDetermine whether a user has requested Unix file permissions using owner, group membership, and mode bits.
NVIDIAUse a recursive CTE to determine whether each stored string has balanced parentheses, including empty and NULL inputs.
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Explain and demonstrate joins, aggregation, NULL handling, conditional logic, and predicate placement in an optimized SQL query.
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