1
GATE CSE 2014 Set 2
Numerical
+2
-0
Consider a main memory system that consists of 8 memory modules attached to the system bus, which is one word wide. When a write request is made, the bus is occupied for $$100$$ nanoseconds ($$ns$$) by the data, address, and control signals. During the same $$100$$ $$ns$$, and for $$500$$ $$ns$$ thereafter, the addressed memory module executes one cycle accepting and storing the data. The (internal) operation of different memory modules may overlap in time, but only one request can be on the bus at any time. The maximum number of stores (of one word each) that can be initiated in $$1$$ millisecond is ____________.
2
GATE CSE 2014 Set 2
+2
-0.6
Suppose a stack implementation supports an instruction REVERSE, which reverses the order of elements on the stack, in addition to the PUSH and POP instructions. Which one of the following statements is TRUE with respect to this modified stack?
A
A queue cannot be implemented using this stack.
B
A queue can be implemented where ENQUEUE takes a single instruction and DEQUEUE takes a sequence of two instructions.
C
A queue can be implemented where ENQUEUE takes a sequence of three instructions and DEQUEUE takes a single instruction.
D
A queue can be implemented where both ENQUEUE and DEQUEUE take a single instruction each
3
GATE CSE 2014 Set 2
Numerical
+2
-0
Consider the expression tree shown. Each leaf represents a numerical value, which can either be 0 or 1. Over all possible choices of the values at the leaves, the maximum possible value of the expression represented by the tree is ___.
4
GATE CSE 2014 Set 2
+1
-0.3
Consider the tree arcs of a BFS traversal from a source node W in an unweighted, connected, undirected graph. The tree T formed by the tree arcs is a data structure for computing
A
the shortest path between every pair of vertices.
B
the shortest path from W to every vertex in the graph.
C
the shortest paths from W to only those nodes that are leaves of T.
D
the longest path in the graph.
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