NIIT Interview Questions and Answers

Question 1

Asked in

Given a string STR containing characters from [a-z], [A-Z], [0-9], and special characters, determine the reverse of the string.

The input starts with a single integer '...read more

Add your answer

Question 2

Asked in

Given a string 'S' of length 'N', identify and return all the characters in the string that appear more than once along with their frequency.

 N = 5
 S = 'GEEK'

Add your answer

Question 3

Asked in

Q3. What is the cut command in Linux and how do you use it?

Add your answer

Question 4

Asked in

Q4. What is the Find command in Linux and how is it used?

Add your answer

Question 5

Asked in

Q5. 2. reverse a string, find a duplicate in a string.

Add your answer

Answer

Reverse a string and find a duplicate in an array of strings.

To reverse a string, we can use the built-in reverse() method or loop through the string and append each character to a new string in reverse order.
To find a duplicate in an array of strings, we can use a hash table to keep track of the frequency of each string and return the first string with a frequency greater than 1.

Question 6

Asked in

Add your answer

Answer

Sorting algorithm is a method of arranging elements in a specific order.

Common sorting algorithms include bubble sort, insertion sort, selection sort, merge sort, quick sort, and heap sort.
The choice of sorting algorithm depends on the size of the data set, the data type, and the desired time complexity.
Sorting algorithms can be implemented in various programming languages such as Java, Python, and C++.