SDE - 1

In the beginning, Ram works at a rate such that he can finish a piece of work in 24 hrs, but he only works at this rate for 16 hrs. After that, he works at a rate such that he can do the whole work in 18 hrs. If Ram is to finish this work at a stretch, how many hours will he take to finish this work?
1) 12 hrs2) 18 hrs3) 11½ hrs4) 15 hrs5) 22 hrs

The number of coins of 1.5 cm in diameter and 0.2 cm thick, to be melted to form a right circular cylinder of height 10 cm of diameter 4.5 cm is

(a) 540
(b) 450
(c) 380
(d) 472

From the given choices select the odd one out
afb
mrn
kpl
rxs

The time taken to switch between user and kernel modes of execution be t1 while the time taken to switch between two processes be t2.

Which of the following is TRUE?
(A) t1 > t2
(B) t1 = t2
(C) t1 < t2
(D) nothing can be said about the relation between t1 and t2

A CPU has two modes-privileged and non-privileged. In order to change the mode from privileged to non-privileged
(A) a hardware interrupt is needed
(B) a software interrupt is needed
(C) a privileged instruction (which does not generate an interrupt) is needed
(D) a non-privileged instruction (which does not generate an interrupt is needed

A processor needs software interrupt to
(A) test the interrupt system of the processor
(B) implement co-routines
(C) obtain system services which need execution of privileged instructions
(D) return from subroutine

You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to return the list of all pairs of elements such that each sum of elements of each pair equals 'S'.

Note:

Each pair should be sorted i.e the first value should be less than or equals to the second value. 

Return the list of pairs sorted in non-decreasing order of their first value. In case if two pairs have the same first value, the pair with a smaller second value should come first.

There are M number of boys, N number of girls and P number of pets given. A pet race is held for a fun filled Sunday in a town. Each pet animal is accompanied by two persons for the race. The organisers are planning for the group has three members, and among these members, there is at least one boy and at least one girl, the third member being a boy, a girl or a pet. One bench is required for each such group.
The task is here is to find the maximum number of benches required for this

There is one scooter which has 2 tyres and one stepney/spare (meaning 3 tyres). Each tyre can run up to max 5 km. How long will the scooter run till?

Two trains are running with speeds 30 kmph and 58 kmph respectively in the same direction. A man in the slower train passes the faster train in 18 seconds. Find the length of the faster train?

A) 105 mts B) 115 mts
C) 120 mts D) 140 mts