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Parallel Computing - Interview Questions & Answers - I.

1) What is Parallel Computing?

Answer: Parallel Computing resembles the study of designing algorithms such that the time complexity is minimum. Thus the speed up factor is taken into consideration.

2) What is a parallel computer?

Answer: A parallel Computer is simply a collection of processors, typically of the same type, interconnected in a certain fashion to allow the coordination of their activities and the exchange of data.

3) What is Moore’s Law?

Answer: Moore's Law states that ‘circuit complexity doubles every eighteen months’.

4) What are the applications parallel computing?

Answer: There are several applications of parallel computing.
Effective parallel algorithms are required for problems such as association rule mining, clustering, classification, and time-series analysis.
Bioinformatics and astrophysics.
Optimization and Branch-and-bound, and Genetic programming.
Association rule mining, clustering, classification, and time-series analysis.

5) What is pipelining?

Answer: Pipelining is a technique of dividing one task into multiple subtasks and executing the subtasks in parallel with multiple hardware units.

6) What is super-scalar Execution?

Answer: The ability of a processor to issue multiple instructions in the same cycle is referred to as superscalar execution.

7) What is true data dependency?

Answer: If the results of an instruction is required for subsequent instructions then this is referred to as true data dependency.

8) What is resource dependency?

Answer: The dependency in which two instructions compete for a single processor resource is referred to as resource dependency.

9) What is Horizontal Waste?

Answer: If only part of the execution units is used during a cycle, it is termed horizontal waste.

10) What is Vertical Waste?

Answer: If, during a particular cycle, no instructions are issued on the execution units, it is referred to as vertical waste.
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