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Questions and Answers
Which machine is the PRAM intended to model algorithmic performance after?
Which machine is the PRAM intended to model algorithmic performance after?
- Random-access machine (RAM) (correct)
- Main memory
- Cache memory
- Sequential algorithm
What does the PRAM model neglect in order to provide any number of processors?
What does the PRAM model neglect in order to provide any number of processors?
- Access time to cache memory
- Algorithm cost
- Synchronization and communication (correct)
- Access time to main memory
What is used by sequential-algorithm designers to model algorithmic performance?
What is used by sequential-algorithm designers to model algorithmic performance?
- Cache memory
- Main memory
- RAM (correct)
- PRAM
What is estimated using parameters O(time) and O(time × processor_n)?
What is estimated using parameters O(time) and O(time × processor_n)?
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What does the RAM model neglect, similar to the PRAM model?
What does the RAM model neglect, similar to the PRAM model?
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Study Notes
Parallel Random Access Machine (PRAM)
- The PRAM is intended to model algorithmic performance after an idealized parallel machine.
- The PRAM model neglects synchronization and communication delays between processors in order to provide any number of processors.
- It is used by parallel-algorithm designers to model algorithmic performance.
Sequential Algorithm Design
- Sequential-algorithm designers use the RAM (Random Access Machine) model to model algorithmic performance.
Algorithmic Performance Estimation
- Algorithmic performance is estimated using parameters O(time) and O(time × processor_n), which represent the time complexity and processor complexity respectively.
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