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QUESTIONSDONE
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NUMBERS
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1Climbing Stairs
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2Check if a given year is leap year
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3Prime Numbers
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4Number is Positive, Negative, Odd, Even, Zero
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5All divisors of a natural number
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6Convert a Number to Hexadecimal
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7Valid Perfect Square
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8Program to add two fractions
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9Fibonacci numbers
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10Add Digits
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11Replace all ‘0’ with ‘5’ in an input Integer
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12Perfect Number
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13Armstrong Numbers
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14Replace all ‘0’ with ‘5’ in an input Integer
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15Sum of first n natural numbers
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16Permutations to arrange N persons around a circular table
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17Roots of Quadratic equation
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18Climbing Stairs
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19Maximum Product of Three Numbers
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20Happy Number
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ARRAYS
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1Two Sum
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2Program to check if an array is sorted or not
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3Sum of elements in a given array
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4Pascal's Triangle
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5Counting frequencies of array elements
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6Move Zeroes
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7Add an element to an Array
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8Contains Duplicate
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9Find duplicates in O(n) time and O(1) extra space
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10Print array after it is right rotated K times
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11Single Number
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12Mean and median of an unsorted array
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13Smallest and second smallest elements in an array
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14Third Maximum Number
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15Sort elements by frequency
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16Majority Element
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17Next Greater Element I
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18Intersection of Two Arrays
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19Find Peak Element
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20Longest Continuous Increasing Subsequence
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STRINGS
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1Given String is Palindrome or not
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2Find Common Characters
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3Remove character
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4Reverse a string
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5Remove All Adjacent Duplicates In String
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6Uncommon Words from Two Sentences
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7Excel Sheet Column Number
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8Frequency of characters in a string
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9Sort string of characters
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10Valid Anagram
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11Convert characters of a string to opposite case
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12Count Binary Substrings
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13Common subsequence in two strings
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14Count Unique Characters of All Substrings of a Given String
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15Find the Difference
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16Duplicates in the input string
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17Count vowels, consonants, digits, and special characters in a string
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18Detect Capital
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19Fizz Buzz
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20Check if a string is substring of another
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SORTING
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1Bubble Sort
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2Selection Sort
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3Insertion Sort
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4Merge Sort
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5Quick Sort
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NUMBER SYSTEM
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1Convert Octal to decimal
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2Convert Binary to Decimal
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3Decimal to Binary conversion
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4Convert decimal to octal
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5Convert decimal to octal
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OTHERS
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1Linear Search
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2Binary Search
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3Detect loop in a linked list
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4Print the middle of a given linked list
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5Can we reverse a linked list in less than O(n)?
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