10+ M*Modal Interview Questions and Answers

Chain of Responsibility is a behavioral design pattern that allows an object to pass a request along a chain of handlers.

• Handlers are linked in a chain and each handler decides whether to process the request or pass it to the next handler

• It decouples senders and receivers of requests

• Commonly used in event handling systems and logging frameworks

My salary expectations are based on my experience, skills, and the industry standard for this position.

• Research industry standards for Associate Product Developer salaries

• Consider my experience and skills when determining salary expectations

• Be prepared to negotiate based on the company's offer and benefits package

Finding second maximum value in an array and calculating the difference between left and outer union.

• Sort the array in descending order and return the second element

• For left union, find the elements that are present in the first array but not in the second

• For outer union, find the elements that are present in either of the arrays but not in both

String is immutable in Java because it enhances security, thread safety, and performance.

• Immutable strings are thread-safe as they cannot be modified by multiple threads simultaneously.

• Immutable strings help in caching and reusing string literals, improving performance.

• Immutable strings prevent malicious attacks like SQL injection by ensuring data integrity.

• Example: String str = "Hello"; str.concat(" World"); // This does not modify the original string.

Design test output is the result of a design test that evaluates the skills and abilities of a UX designer.

• The output should showcase the designer's problem-solving skills

• It should demonstrate the designer's ability to create user-centered designs

• The output should be visually appealing and easy to understand

• It should include annotations and explanations to support the design decisions

• Examples of design test output include wireframes, prototypes, and design briefs

The design process of screens involves research, ideation, prototyping, testing, and iteration.

• Conduct user research to understand user needs and pain points

• Ideate and sketch out potential solutions

• Create wireframes and prototypes to test with users

• Iterate based on user feedback and testing results

• Ensure consistency in design elements and user interface

• Collaborate with developers to ensure feasibility of design

• Consider accessibility and usability for all users

Left union and outer union are two types of SQL joins. Left union returns all rows from the left table and matching rows from the right table. Outer union returns all rows from both tables.

• Left union is also known as left join.

• Outer union is also known as full outer join.

• Left union returns all rows from the left table and matching rows from the right table.

• Outer union returns all rows from both tables.

• If there is no match in the right table for a row in the left table, the re...read more

Find the number with the highest frequency in an array of strings.

• Create a map to store the frequency of each number in the array.

• Iterate through the array and update the frequency in the map.

• Find the number with the highest frequency in the map.

egrep is a command-line tool used for pattern matching in text files.

• egrep stands for 'extended grep'

• It is used to search for patterns in one or more files

• It supports regular expressions for pattern matching

• It can be used with various options to modify the search behavior

• Example: egrep 'error|warning' logfile.txt

HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

• HashMap is part of the Java Collections Framework.

• It uses hashing to store and retrieve elements efficiently.

• Each key in a HashMap must be unique.

• Example: HashMap map = new HashMap<>(); map.put("apple", 5);

I will improve customer retention by implementing personalized communication strategies and enhancing customer experience.

• Implement personalized communication strategies to make customers feel valued and understood

• Enhance customer experience by providing exceptional service and addressing any issues promptly

• Offer loyalty programs or incentives to encourage repeat business

• Gather feedback from customers to understand their needs and preferences

• Utilize data analytics to identify...read more

Expected CTC refers to the salary range that the candidate is anticipating or hoping to receive for the position.

• Expected CTC is usually based on the candidate's experience, skills, industry standards, and the company's budget.

• Candidates may provide a range instead of a specific number to allow for negotiation.

• Employers may ask for expected CTC to ensure that the candidate's salary expectations align with the company's budget.

• It is important for candidates to research industr...read more

Concurrent hashmap is a thread-safe version of hashmap in Java, allowing multiple threads to access and modify it concurrently.

• ConcurrentHashMap was introduced in Java 5 to address the thread-safety issue of HashMap.

• It allows multiple threads to read and write to the map concurrently without causing a ConcurrentModificationException.

• It achieves thread-safety by dividing the map into segments, each guarded by a separate lock.

• ConcurrentHashMap is preferred over synchronized Has...read more

Current CTC refers to the total salary package of an employee including all benefits and allowances.

• Current CTC includes base salary, bonuses, incentives, and other perks.

• It does not include future salary increases or potential bonuses.

• Example: If the current CTC is $50,000, it means the employee is currently earning that amount annually.

A locomotive train is a powerful engine that pulls a series of connected cars or wagons on a railway track.

• Determine the purpose of the train (passenger or freight)

• Choose the appropriate locomotive type (steam, diesel, electric)

• Design the engine with enough power to pull the load

• Include safety features such as brakes and signals

• Consider the aerodynamics and weight distribution for efficient operation