Blue Yonder Senior Software Engineer Interview Questions and Answers

Program to find the largest and smallest integer in a program

• Iterate through the array of integers to find the largest and smallest values

• Initialize variables to store the largest and smallest values, update them as needed

• Handle edge cases like empty array or array with only one element

• Return the largest and smallest values found

HashMap is a data structure that stores key-value pairs using hashing. An abstract class is a class that cannot be instantiated.

• HashMap uses hashing to store key-value pairs for efficient retrieval.

• Abstract classes cannot be instantiated and can have abstract methods that must be implemented by subclasses.

• Example: HashMap<String, Integer> map = new HashMap<>();

LinkedList is preferred for constant modification due to faster insertion and deletion times.

• LinkedList is preferred for constant modification because it has faster insertion and deletion times compared to ArrayList.

• LinkedList allows for easy insertion and deletion of elements without the need to shift other elements, making it more efficient for constant modifications.

• ArrayList is better for random access and iteratin...read more

Identify duplicate strings in an array using various methods.

• Use a HashSet to track seen strings. Example: ['apple', 'banana', 'apple'] results in 'apple' as duplicate.

• Sort the array and check adjacent elements. Example: ['apple', 'banana', 'apple'] becomes ['apple', 'apple', 'banana'].

• Use a frequency map (dictionary) to count occurrences. Example: {'apple': 2, 'banana': 1} indicates 'apple' is a duplicate.

An event loop is a programming construct that waits for and dispatches events or messages in a program.

• The event loop continuously checks for events and executes associated callbacks.

• It allows non-blocking I/O operations, enabling efficient handling of multiple tasks.

• In JavaScript, the event loop is crucial for asynchronous programming, managing tasks like API calls.

• Example: In a web browser, the event loop handles use...read more

Redux is a predictable state container for JavaScript apps, enabling centralized state management and unidirectional data flow.

• Centralized Store: Redux maintains a single store that holds the entire state of the application.

• Actions: Actions are plain JavaScript objects that describe changes to the state. Example: { type: 'ADD_TODO', payload: 'Learn Redux' }

• Reducers: Reducers are pure functions that take the current sta...read more