High performance computing MCQ Unit-4 | HPC MCQ

High Performance Computing MCQ Questions and Answers UNIT – 4 What is High performance computing ? HPC – High Performance Computing is the use of parallel processing for running advanced application programs efficiently, reliably and quickly. The term applies especially to systems that function above a teraflop or 1012 floating-point operations per second. The term HPC is occasionally used as a synonym for supercomputing, although technically a supercomputer is a system that performs at or near the currently highest operational rate for computers. Some supercomputers work at more than a petaflop or 1015 floating-point operations per second.

High Performance Computing MCQ UNIT – 4

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

Answer: e=s/p

  1. Cost of a parallel system is sometimes referred to____ of product

work
processor time
both
none

Answer: both

  1. Scaling Characteristics of Parallel Programs Ts is

increase
constant
decreases
none

Answer: constant

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

increase
constant
decreases
none

Answer: decreases

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  1. Speedup obtained when the problem size is __ linearly with the number of processing elements.

increase
constant
decreases
depend on problem size

Answer: increase

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

row
column
both
depend on processor

Answer: row

  1. cost-optimal parallel systems have an efficiency of _

1
n
logn
complex

Answer: 1

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

n
2n
single
double

Answer: single

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

1
2
3
4

Answer: 3

  1. In DNS algorithm of matrix multiplication it used

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

Answer: 3d partition

high performance computing mcq sppu

  1. In the Pipelined Execution, steps contain

normalization
communication
elimination
all

Answer: all

  1. 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

Answer: 3/2

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

mapping
acyclic
cyclic
both
none

Answer: acyclic

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

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

Answer: all

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

a)<=

b)>=
c)<

d)>

Answer: a)<=

  1. C(W)__Θ(W) for optimality (necessary condition).

>
<
<=
equals

Answer: equals

  1. many interactions in oractical parallel programs occur in __ pattern

well defined
zig-zac
reverse
straight

Answer :well defined

  1. efficient implementation of basic communication operation can improve

performance
communication
algorithm
all

Answer: performance

  1. efficient use of basic communication operations can reduce

development effort
software quality
both
none

Answer: development effort

high performance computing mcq questions

  1. Group communication operations are built using _ Messenging primitives.

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

Answer: point-to-point

  1. 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

Answer: one -to-all

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

Algorithm
communication
concurrency
receiver

Answer: concurrency

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

1
2
8
0

Answer: 0

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

local
global
both
none

Answer: local

  1. one to all broadcast use

recursive doubling
simple algorithm
both
none

Answer: recursive doubling

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

recursive order
straight order
vertical order
parallel order

Answer: recursive order

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

1
2
8
0

Answer: 0

  1. logical operators used in algorithm are

XOR
AND
both
none

Answer: both

  1. Generalization of broadcast in Which each processor is

Source as well as destination
only source
only destination
none

Answer: Source as well as destination

  1. The algorithm terminates in _ steps

p
p+1
p+2
p-1

Answer: p-1

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

broadcast
identify
verify
none

Answer: broadcast

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

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

Answer: All-to-all

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

√p
p
p+1
p-1

Answer: √p

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

Algorithm
hypercube
both
none

Answer: Algorithm

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

error
contention
recursion
none

Answer: contention

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

single
double
triple
none

Answer: single

  1. The gather Operation is exactly the inverse of _

scatter operation
recursion operation
execution
none

Answer: scatter operation

  1. Similar communication pattern to all-to-all broadcast except in the_____

reverse order
parallel order
straight order
vertical order

Answer: reverse order

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