To implement a stack using queue(with only enqueue and dequeue
operations), how many queues will you need?
a) 1
b) 2
c) 3
d) 4
Explanation: Either the push or the pop has to be a costly operation, and the costlier operation requires two queues.
Express -15 as a 6-bit signed binary number.
a) 001111
b) 101111
c) 101110
d) 001110
Explanation: The first 4 1s from the right represent the number 15, 2 more bits are padded to make it 6 digits and the leftmost bit is a 1 to represent that it is -15.
