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Computer Science
Multi-Core Processors
Quiz 1
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Q.1
They would be in serial program.
. nowait
. ordered
. collapse
. for loops
Q.2
Let S and Q be two semaphores initialized towhere P0 and P1 processes the following statements wait(S);wait(Q); ---; signal(S);signal(Q) and wait(Q); wait(S);---;signal(Q);signal(S); respectively. The above situation depicts a .
. livelock
. critical section
. deadlock
. mutual exclusion
Q.3
Programming. The issues related to synchronization include the followings, EXCEPT:
. deadlock
. livelock
. fairness
. correctness
Q.4
Takes the data in data to be packed and packs it into
. mpi unpack
. mpi_pack
. mpi_datatype
. mpi_comm
Q.5
Has in its stack.
. terminated
. send rejects
. receive rejects
. empty
Q.6
Addition to the cost of the communication, the packing and unpacking is very .
. global least cost
. time- consuming
. expensive tours
. shared stack
Q.7
User program and buffersize is its size in bytes.
. tour data
. node tasks
. actual computation
. buffer argument
Q.8
Could possibly lead to a least-cost solution.
. depth-first search
. foster‘s methodology
. reduced algorithm
. breadth first search
Q.9
Parallelizing them using OpenMP.
. thread‘s rank
. function loopschedule
. pthreads
. loop variable
Q.10
Workload in the computation of the forces.
. cyclic distribution
. velocity of each particle
. universal gravitation
. gravitational constant
Q.11
Interface (MPI)?
. a specification of a shared memory library
. mpi uses objects called communicators and groups to define which collection of processes may communicate with each other
. only communicators and not groups are accessible to the programmer only by a "handle"
. a communicator is an ordered set of processes
Q.12
Is applicable in ___________________.
. amdahl\s law
. gustafson-barsis\s law
. newton\s law
. pascal\s law
Q.13
The operation similarly computes an element-wise reduction of vectors, but this time leaves the result scattered among the processes.
reduce-scatter
reduce (to-one)
allreduce
none of the above
Q.14
is an object that holds information about the received message, including, for example, it’s actually count.
buff
count
tag
status
Q.15
The easiest way to create communicators with new groups is with .
mpi_comm_rank
mpi_comm_create
mpi_comm_split
mpi_comm_group
Q.16
Them in this case and returning the result to a single process.
mpi _ reduce
mpi_ bcast
mpi_ finalize
mpi_ comm size
Q.17
Selectively screen messages.
dest
type
address
length
Q.18
CSMulti Core Architecture and Programming CSE - Regulations 2017
scatter
gather
broadcast
allgather
Q.19
generate log files of MPI calls.
mpicxx
mpilog
mpitrace
mpianim
Q.20
Global_count += 5;
. 4 instructions
. 3 instructions
. 5 instructions
. 2 instructions
0 h : 0 m : 1 s
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