Iris Software
10+ MassMutual Interview Questions and Answers
Q1. Java 8 vs 7 case studies. Stream vs collections case studies.
Java 8 introduced streams which are more efficient than collections in certain cases.
Streams are useful for processing large amounts of data in parallel
Collections are better for small amounts of data or when modifying data
Java 8's stream API provides a functional programming approach to data processing
Java 7's collections API is more traditional and imperative
Example: Using streams to filter and map data from a database query
Example: Using collections to manipulate a small l...read more
Q2. Add one to a given String of number
Add one to a given String of number
Convert the string to integer, add one, and convert back to string
Handle edge cases like leading zeros
Consider using built-in functions like parseInt() and toString()
Q3. How to add dynamic component in view
To add a dynamic component in a view, use a framework or library that supports dynamic rendering and component creation.
Use a framework like React or Angular that allows for dynamic component creation
Create a component factory or use a component resolver to dynamically create and render components
Pass data or props to the dynamic component to customize its behavior
Update the view or component tree to include the dynamically created component
Q4. All Concurrent Utility Classes and their uses.
Concurrent Utility Classes provide support for concurrent programming in Java.
ConcurrentHashMap: Thread-safe implementation of Map interface.
CopyOnWriteArrayList: Thread-safe implementation of List interface.
CountDownLatch: Synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.
Semaphore: Controls the number of threads that can access a shared resource concurrently.
ExecutorService: Interface that provid...read more
Q5. Core java using java 8 features
Core Java features in Java 8 include lambda expressions, functional interfaces, streams, and default methods.
Lambda expressions allow you to pass functionality as an argument to a method.
Functional interfaces have a single abstract method and can be used with lambda expressions.
Streams provide a way to process collections of objects in a functional style.
Default methods allow interfaces to have methods with implementations.
Example: Using lambda expressions to iterate over a l...read more
Q6. What are the feature of jdk 8
JDK 8 features include lambda expressions, functional interfaces, streams, and default methods.
Lambda expressions allow you to write code in a more concise and readable way.
Functional interfaces enable the use of lambda expressions.
Streams provide a way to work with sequences of elements efficiently.
Default methods allow interfaces to have concrete methods.
Date and Time API improvements.
Q7. Difference between deep and shallow copy
Deep copy creates a new object and recursively copies all nested objects, while shallow copy creates a new object and copies the references to nested objects.
Deep copy duplicates all levels of the object hierarchy, ensuring that changes in the copied object do not affect the original object.
Shallow copy only duplicates the top-level object, so changes in the copied object may affect the original object.
Deep copy is more time and memory-consuming than shallow copy.
In Python, d...read more
Q8. Ways to set values in form groups
Ways to set values in form groups
Use setValue() method to set values in form groups
Use patchValue() method to set values in form groups
Use reset() method to set values in form groups
Q9. Oops concepts in java
Oops concepts in java refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.
Inheritance: Allows a class to inherit properties and behavior from another class.
Encapsulation: Bundling data and methods that operate on the data into a single unit.
Polymorphism: Ability of a method to do different things based on the object it is acting upon.
Abstraction: Hiding the implementation details and showing only the necessary feature...read more
Q10. Internal working of hashmap
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
HashMap uses the hashCode() method of keys to calculate the hash value.
HashMap provides constant-t...read more
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