Naresh i Technologies Project Trainee Interview Questions, Process, and Tips

To find missing number, duplicate, largest and smallest elements, and multiple duplicates in an array.

• To find missing number, calculate the sum of all numbers from 1 to 100 and subtract the sum of the given array.

• To find duplicate, use a hash set to store elements as you iterate through the array and check for duplicates.

• To find largest and smallest elements, initialize variables with the first element and update them ...read more

To reverse an array of strings, iterate through the array and swap elements from start to end.

• Iterate through the array using two pointers, one starting from the beginning and the other from the end.

• Swap the elements at the two pointers and move the pointers towards the center until they meet or cross each other.

To find the median in 2 arrays of strings, merge the arrays, sort them, and then calculate the median.

• Merge the two arrays into one array

• Sort the merged array

• Calculate the median based on the length of the array (odd or even number of elements)

Array is a fixed-size collection of elements of the same data type, while ArrayList is a dynamic collection that can grow or shrink in size.

• Array is a static data structure with a fixed size, while ArrayList is a dynamic data structure that can resize itself.

• Arrays can hold primitive data types and objects, while ArrayList can only hold objects.

• Arrays are faster than ArrayList for accessing elements, but ArrayList is m...read more