**high performance computing mcq questions and answers**

**1. mathematically efficiency is**

- e=s/p
- e=p/s
- e*s=p/2
- e=p+e/e

e=s/p

**2. Cost of a parallel system is sometimes referred to____ of product**

- work
- processor time
- both
- none

both

**3. Scaling Characteristics of Parallel Programs Ts is**

- increase
- constant
- decreases
- none

constant

**4. Speedup tends to saturate and efficiency _ as a consequence of Amdahl’s law.**

- increase
- constant
- decreases
- none

decreases

**5. Speedup obtained when the problem size is ______ linearly with the number of processing elements.**

- increase
- constant
- decreases
- depend on problem size

increase

**6. The n × n matrix is partitioned among n processors, with each processor storing complete ___ _ of the matrix.**

- row
- column
- both
- depend on processor

row

**7. cost-optimal parallel systems have an efficiency of _____**

- 1
- n
- logn
- complex

1

**8. The n × n matrix is partitioned among n2 processors such that each processor owns a _ element**

- n
- 2n
- single
- double

single

**9. how many basic communication operations are used in matrix vector multiplication**

- 1
- 2
- 3
- 4

3

**10. In DNS algorithm of matrix multiplication it used**

- 1d partition
- 2d partition
- 3d partition
- both a,b

3d partition

**high performance computing mcq sppu**

**11. In the Pipelined Execution, steps contain**

- normalization
- communication
- elimination
- all

all

**12. the cost of the parallel algorithm is higher than the sequential run time by a factor of __**

- 3/2
- 2/3
- 3*2
- 2/3+3/2

3/2

**13. The load imbalance problem in Parallel Gaussian Elimination: can be alleviated by using a __**

- mapping
- acyclic
- cyclic
- both
- none

acyclic

**14. A parallel algorithm is evaluated by its runtime in function of**

- the input size,
- the number of processors,
- the communication parameters.
- all

all

**15. For a problem consisting of W units of work, p__W processors can be used optimally**

- <=
- >=
- <
- >

<=

**16. C(W)__Θ(W) for optimality (necessary condition).**

- >
- <
- <=
- equals

equals

**17. many interactions in oractical parallel programs occur in ____ pattern**

- well defined
- zig-zac
- reverse
- straight

well defined

**18. efficient implementation of basic communication operation can improve**

- performance
- communication
- algorithm
- all

performance

**19. efficient use of basic communication operations can reduce**

- development effort
- software quality
- both
- none

development effort

**high performance computing mcq questions**

**20. Group communication operations are built using _____ Messenging primitives.**

- point-to-point
- one-to-all
- all-to-one
- none

point-to-point

**21. one processor has a piece of data and it need to send to everyone is**

- one -to-all
- all-to-one
- point -to-point
- all of above

one -to-all

**22. wimpleat way to send p-1 messages from source to the other p-1 processors**

- Algorithm
- communication
- concurrency
- receiver

concurrency

**23. In a eight node ring, node __ is source of broadcast**

- 1
- 2
- 8
- 0

0

**24. The processors compute __ product of the vector element and the local matrix**

- local
- global
- both
- none

local

**25. one to all broadcast use**

- recursive doubling
- simple algorithm
- both
- none

recursive doubling

**26. In a broadcast and reduction on a balanced binary tree reduction is done in __**

- recursive order
- straight order
- vertical order
- parallel order

recursive order

**27. if “X” is the message to broadcast it initially resides at the source node**

- 1
- 2
- 8
- 0

0

**28. logical operators used in algorithm are**

- XOR
- AND
- both
- none

both

**29. Generalization of broadcast in Which each processor is**

- Source as well as destination
- only source
- only destination
- none

Source as well as destination

**30. The algorithm terminates in _ steps**

- p
- p+1
- p+2
- p-1

p-1

**30. Each node first sends to one of its neighbours the data it need to….**

- broadcast
- identify
- verify
- none

broadcast

**30. The second communication phase is a columnwise __ broadcast of consolidated**

- All-to-all
- one -to-all
- all-to-one
- point-to-point

All-to-all

**30. All nodes collects _ message corresponding to √p nodes to their respectively**

- √p
- p
- p+1
- p-1

√p

**30. It is not possible to port __ for higher dimensional network**

- Algorithm
- hypercube
- both
- none

Algorithm

**30. If we port algorithm to higher dimemsional network it would cause**

- error
- contention
- recursion
- none

contention

**30. In the scatter operation __ node send message to every other node**

- single
- double
- triple
- none

single

**30. The gather Operation is exactly the inverse of _**

- scatter operation
- recursion operation
- execution
- none

scatter operation

**30. Similar communication pattern to all-to-all broadcast except in the_____**

- reverse order
- parallel order
- straight order
- vertical order

reverse order

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