Programmer Analyst

What Is virtual memory

You are given a positive integer ‘N’. Your task is to print all prime numbers less than or equal to N.

Note: A prime number is a natural number that is divisible only by 1 and itself. Example - 2, 3, 17, etc.

You can assume that the value of N will always be greater than 1. So, the answer will always exist.

You are given the arrival and departure times of N trains at a railway station in a day. You need to find the minimum of platforms required for the railway station such that no train waits i.e No train should wait for the platform to be clear or free.

You're given a string 'S' consisting of "{", "}", "(", ")", "[" and "]" .

Return true if the given string 'S' is balanced, else return false.

For example:

'S' = "{}()".

There is always an opening brace before a closing brace i.e. '{' before '}', '(' before ').
So the 'S' is Balanced.

H.C.F and L.C.M of two numbers are 84 and 21 respectively. If the ratio of the two numbers is 1:4, then the larger of the two numbers is

You are given an array consisting of N integers. You need to find the number of k-element subsequences of the given array where the bitwise AND of the subsequence's elements is maximal. Also, find the maximal AND value.

Example:

Let the array be [1, 3, 6, 7] and K=3. The possible k-element subsequences of the given array are: {1, 3, 6}, {1, 3, 7}, {1, 6, 7}, {3, 6, 7}. Applying AND operation on all possible subsequences we get values: 0, 1, 0, 2 respectively. The maximal AND value of these subsequences is 2, and only 1 subsequence {3, 6, 7} has this value.

You have been given an integer array/list(arr) and a number 'Sum'. Find and return the total number of pairs in the array/list which when added, results equal to the 'Sum'.

Note:

Given array/list can contain duplicate elements.

(arr[i],arr[j]) and (arr[j],arr[i]) are considered same.

Mina drives from her home to the nearest bus station at an average speed of 80km/h. From the bus station, she boards a bus that takes to her office at a speed of 120km/h. The entire distance covered by her is 92km, and the entire journey took her 1 hour. Find the distance between the bus station from where she boards the bus and her office.

How many seconds will a 500-meter long train moving with a speed of 63 km/hour, take to cross a man walking at a speed of 3 km/hour in the direction of the train?