Virtual Address Space & Memory Isolation Questions
Virtual address space concepts, address translation, paging/segmentation, page tables, TLBs, page fault handling, and memory protection mechanisms that isolate processes from each other. Includes hardware support (MMU), virtual memory management policies, and implications for security and performance.
EasyTechnical
0 practiced
Compare and contrast paging and segmentation as memory-management schemes. For each approach list: how addresses are formed, primary benefits, typical hardware support, and why modern general-purpose OSes (e.g., Linux) favor paging over segmentation for process isolation.
MediumTechnical
0 practiced
A long-running service maps shared libraries and then forks worker processes. Explain how code and data pages are shared after fork, what triggers private copies, and how you would measure how much memory is actually shared vs private using tools such as smaps and pmap.
EasyTechnical
0 practiced
What is a Translation Lookaside Buffer (TLB) and how does it affect performance? Explain what happens on a TLB miss and why TLB behavior is critical for latency-sensitive services that SREs operate.
EasyTechnical
0 practiced
Describe the sequence of events when a process takes a page fault on Linux (user-mode access to a non-present page). Cover the steps from CPU exception to the process being resumed, including kernel checks and how demand paging is satisfied.
MediumSystem Design
0 practiced
Design monitoring, alerting, and an SLO for memory-related reliability for a latency-sensitive service. Specify metrics to collect (at node and process level), alert thresholds that map to an error budget, and concrete runbook steps when alerts fire.
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