Suppose that a client performs an intermixed sequence of (queue) enqueue and dequeue operations. The enqueue operations put the integers 0 through 9 in order onto the queue; the dequeue operations print out the return value. Which of the following sequence(s) could not occur(a) 0 1 2 3 4 5 6 7 8 9(b) 4 6 8 7 5 3 2 9 0 1(c) 2 5 6 7 4 8 9 3 1 0(d) 4 3 2 1 0 5 6 7 8 9

b,c and d can't occur.

Explanation:

Queues always preserve sequence.

yes we can change both the color of the value of a cell as well as background color of a cell at the same time .

as we know that excel sheet consists of columns and rows.

and intersection of column and row is called cell.

we can change color of the cell and background of the cell at the same time.

hence the statement that

can a person change color of the cell and background of the cell at the same time is true.

answertrue;