Best Developer's Guide to Ace Interview - Guaranteed Results

Use the mod operator in Java to determine if a number is even or odd with an if condition and examples using 50 and 51.

Learn to check prime status with a Java program in Eclipse, using 2 to num/2 and a flag to print prime or not. Note 1 is neither prime nor composite.

Learn to generate a Fibonacci series in Java by initializing two variables to 0 and 1, then loop to print the first ten numbers and update values with their sum.

Learn to check Armstrong numbers in Java by calculating the sum of cubes of digits with a loop and mod operations. Validate whether the computed sum matches the original number.

Compute factorials by multiplying numbers from n down to 1 using a reverse for loop in Java. For example, 5! equals 120; 0! equals 1; negative numbers have no factorial.

Reverse a string in Java by converting it to a char array and iterating backward with a for loop to build the reversed string.

Learn how to determine if two strings are anagrams in a Java program by checking equal lengths, converting to lowercase, converting to character arrays, sorting, and comparing.

Find duplicate characters in a string using a Java program. Convert to a char array and use two nested loops with an output array to collect and print duplicates.

Learn to find vowels and consonants in a string with a basic Java program, using arrays to collect letters and count each occurrence, then display results as comma-separated strings.

Discover how Java strings are immutable: assigning causes a new object while the original stays unchanged, demonstrated through input cases using concat and plus operator.

Learn to use the Stream API to move all zeros to the end by partitioning by zero, flattening with flatMap, and collecting results into a single list.

Create a stream from the string list, collect a map of each string to its duplicate character count using identity and grouping by counting, producing the final results.

Explore using Java streams to find duplicates in an integer array by filtering with a frequency function, then collecting duplicates into a set and printing the results.

Generate a stream of random numbers using the stream API by creating a random object, applying a limit, and printing with for each loop using int, long, or double getters.

Group names by length with streams and count each group. Convert the input into a list, stream it, and collect by length to produce a length-to-count map.

Use the stream API to find duplicate characters in a string by counting frequencies, filtering counts greater than one, and collecting keys as a list; information yields i, n, o.

Remove null values from a list using the Stream API by filtering non-null elements and collecting the results into a new list.

Leverage stream api to find the longest string in a list by comparing string lengths, handle empty lists with optional, and produce the result grape fruit.

Calculate the average age from a list of persons using streams, mapping each person to their age and then averaging the results.

Merge two lists using the stream API to produce a single sorted list by concatenating streams and collecting the results.

Leverage the stream API to find the intersection of two sorted integer lists by filtering the first list with contains on the second and collecting the result.

Learn to remove duplicates from an integer list using the Stream API while preserving order. Use distinct and collect to a list to get the final result 123456.

Leverage streams to process a list of transactions, group by date, and sum amounts, producing a map of daily totals using collectors and the transaction class's date and amount getters.

Learn to find the kth smallest element in an array using streams: sort, skip k-1, and find first, with a fallback when k is invalid, illustrated by a 4271536 example.

Harness the stream API to compute word frequencies from a list by grouping. Use function identity and counting, then collect into a map showing banana two, cherry one, apple three.

Use the stream API to partition an integer list into even and odd numbers with a predicate, collect into a map, and print separate lists for true and false results.

Convert an integer list to a string stream, map to string, filter by startswith '1', and collect to reveal numbers starting with one (example output 1015).

Learn to find the maximum value in a list of integers using streams, converting an array to a list, applying the max function with compare, and retrieving the result 98.

group words by their characters using Java streams by sorting each string's characters and grouping by the resulting key; create a map of words that have the same characters.