Out-of-Order Execution MCQs

By: Prof. Dr. Fazal Rehman | Last updated: June 23, 2025

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1. : What is out-of-order execution in CPU architecture?





2. : The main advantage of out-of-order execution is:





3. : Which hardware component is primarily responsible for implementing out-of-order execution?





4. : What is the purpose of the instruction reordering in out-of-order execution?





5. : Which of the following is a common issue in out-of-order execution?





6. : In out-of-order execution, what is the role of the instruction window?





7. : Which of the following techniques helps resolve data hazards in out-of-order execution?





8. : What is register renaming used for in out-of-order execution?





9. : The primary challenge of implementing out-of-order execution is:





10. : In out-of-order execution, what is a “scoreboard”?





11. : Which of the following is NOT a benefit of out-of-order execution?





12. : What type of dependency does out-of-order execution aim to resolve?





13. : What is a “reorder buffer” in out-of-order execution?





14. : Which of the following best describes the role of the instruction scheduler in out-of-order execution?





15. : What is a potential drawback of out-of-order execution?





16. : In out-of-order execution, what is meant by “issue stage”?





17. : Which technique helps reduce the impact of branch mispredictions in out-of-order execution?





18. : What does the term “instruction window” refer to in out-of-order execution?





19. : How does out-of-order execution affect cache utilization?





20. : What is the “commit stage” in out-of-order execution?





21. : In out-of-order execution, which of the following is used to manage instruction dependencies?





22. : What is the primary role of the execution units in out-of-order processors?





23. : How does out-of-order execution affect instruction-level parallelism (ILP)?





24. : What is a “data hazard” in the context of out-of-order execution?





25. : Which component helps in managing the state of instructions in out-of-order execution?





26. : What is “speculative execution” in out-of-order processors?





27. : Which of the following is NOT typically used to resolve control hazards in out-of-order execution?





28. : In out-of-order execution, what does “out-of-order issue” refer to?





29. : What role does the “issue queue” play in out-of-order execution?





30. : Which of the following is a challenge associated with speculative execution?





 

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