NIELIT 2020 : Revision Quiz 30

The school principal has received complaints from parents about bullying in the school yard during recess. He wants to investigate and end this situation as soon as possible, so he has asked the recess aides to watch closely. Which situation should the recess aides report to the principal?

A, P, R, X, S and Z are sitting in a row. S and Z are in the centre. A and P are at the ends. R is sitting to the left of A. Who is to the right of P?

The speed of a boat in still water is 24 km/hr and the speed of the stream is 8 km/hr. It takes a total 20 hours to row upstream from point X to Point Y and downstream from Point Y to Point Z. If the distance from X to Y is one third of the distance between Y and Z. What is the total distance travelled by the boat (both upstream and downstream)?

If 1 is added to the middle digit of each number and then the first and second digits are interchanged , which of the following will be the first digit from the left of the  smallest number ?

386 752 961 573 839

The number of tokens in the following C statement is

int i = 10;

float b = 12.0;

printf("x = %i, y = %f", i++, ++b);

In a ripple counter using edge-triggered JK flip-flops, the pulse input is applied to

Which of the following methods is the most effective for picking the pivot element?

Given relations R(w,x) and S(y,z),the result of SELECT DISTINCT w,x from R,S is guaranteed to be same as R, provided.

The post order traversal of a binary search tree is-
7, 12, 11, 15, 14, 13, 20, 22, 25, 24, 21, 17
Then the preorder traversal of this tree is:

Which level of RAID refers to disk mirroring with block striping?