Java Programming for SDET Interview Coding Challenges

Learn to write a Java program that uses a scanner to read three numbers and determine the largest using an if-else comparison, with clear step-by-step input and output.

Take an input string, count the frequency of each character, then sort characters by frequency in descending order using bubble sort, and print each character with its frequency.

Create a Java program that counts vowels in a user-provided string by using a scanner, converting input to lowercase, and iterating characters with a vowel check.

Discover how to find missing numbers in a Java array using sorting, range checks, and a contains helper, then print results with an ArrayList of missing values.

Use a for loop in Java to traverse the numbers array and accumulate each element to compute the total. Print the final sum, 150.

Learn to sort an array in ascending order with bubble sort in Java, using a main method, array initialization, element swapping, and printing the sorted result.

learn how to compare two hash sets for equality using the equals method, demonstrating that order doesn't matter when the sets contain the same elements.

Print the elements of an int array in reverse order by starting at the last index (length minus one) and printing each value.

Move all zeros to the end of an array in Java using a two-pointer approach, preserving the order of non-zero elements. Use a swap-based method and see a concrete example.

Learn to remove elements greater than a given value from a Java ArrayList using an iterator to modify the list in place, with a threshold example of ten.

Learn a Java program to find missing numbers in an array by sorting, identifying the range, and collecting absent values in an ArrayList for output.

implement a Java program that finds the intersection of two arrays using nested loops to compare elements, printing common values found in both arrays.

Learn to find the second smallest and second largest numbers in an array without sorting, by tracking min, max, second min, and second max, while handling duplicates.

Learn how to find the common elements between two arrays in Java using nested loops, comparing each element and printing matches, then using break to move to the next element.

Implement a Java program using the sliding window technique to find the first negative number in every k-sized window, returning zero when none and producing the results as a list.

Write a Java program that creates a string linked list of city names, adds elements to the beginning and end, and prints the final list.

Learn to reverse an array in place using the two-pointer technique in Java for sdet interview coding challenges, swapping left and right elements to produce the reversed sequence.

Using a two-pointer approach on a sorted array, this lecture demonstrates a Java method hasPairWithSum that returns true when any pair sums to the target, with a main test.

Reverse a string without loops by using recursion: reverse the rest of the string and append the first character, with a base case for an empty string.

Use a sliding window with a hash map to find the length of the longest substring without repeating characters. Update the window by the last-seen indices to keep it unique.

Design and implement a Java program to find the first non-repeating character in a string using a linked hash map to count occurrences and identify the first unique character.