Which of these is an example of a peephole optimization

Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.

Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.

If A is coded as ‘+’, C is coded as ‘÷’, B is coded as ‘×’ and D is coded as ‘-’, then what is the value of

Select the number combination of letters that when placed sequentially in the blanks of the given series will complete the series.

In the given arrangement, how many such numbers are there which immediately followed by a letter?

Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.

Which element is 7th to the right of the element, which is 13th to the left of '4'?

Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series

Complete the given pattern by choosing the correct alternative.

Which element is the fifth element to the right of the 15^th element from the right end?