These are Multi-Core Computer Architecture Nptel Week 10 Answers
Q1. What is the basic unit of flow control between a pair of adjacent routers in an NoC? Crossbar Packet Buffer Flit
Answer: Flit
Q2. What does the term topology specify in on-chip networks? The way routers are connected The routing algorithm used The flow control mechanism The size of the network
Answer: The way routers are connected
These are Multi-Core Computer Architecture Nptel Week 10 Answers
Q3. When we use source routing in on-chip networks, where is the routing information stored? In the packet header In the router’s table In the virtual channel In the crossbar
Answer: In the packet header
Q4. In an NoC, following are the functions performed by a router in order to forward a packet received in its input port to an appropriate output port. i. Route Computation ii. Buffering of Flits iii. Switch Allocation iv. VC Allocation v. Switch Traversal vi. Link Traversal Which of the following is the correct sequence in which the functions are performed? i-ii-iii-iv-v-vi ii-i-iv-iii-v-vi ii-i-iii-iv-v-vi v-ii-i-iv-iii-vi
Answer: ii-i-iv-iii-v-vi
These are Multi-Core Computer Architecture Nptel Week 10 Answers
Q5. In an NoC router, if an incoming packet has more than one potential output port possible as per the adaptive routing algorithm, one output port is finally chosen by __ input selection strategy spatial scheduling output selection strategy VC allocation
Answer: output selection strategy
Q6. Which one of the following statements is FALSE? XY routing is minimal and always deadlock free. Odd even routing is adaptive but not deadlock free. East first routing can be non-minimal. North last routing is deadlock free.
Answer: Odd even routing is adaptive but not deadlock free.
Q7. In a 6×6, 2D-mesh network on chip, the number of routers in the network that are directly connected to four other routers as well as to local tile is ____.
Answer: 16
These are Multi-Core Computer Architecture Nptel Week 10 Answers
Q8. Consider an 64-tile system that uses a square mesh NoC topology where routers follows minimal odd-even routing. The packet P1 travels from router 18 to 36, how many unique paths exist for this packet to reach its destination?
Answer: 3
Q9. Consider an 8×8 mesh NoC that XY routing to forward packets. Consider 3 packets P1, P2 and P3 who details (packet number, source, destination) are given. <P1, 18, 44>, <P2, 39, 12> and <P3, 23, 3>. What is the router number through which all the three packets will pass though?
Answer: 20
These are Multi-Core Computer Architecture Nptel Week 10 Answers
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