ZeMoSo Technologies Principal Software Engineer Interview Questions, Process, and Tips

Simple coding questions and technical questions

Q1. Questions about the java programming language
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Q2. Question on spring frameworks
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Q1. Sql query to find 2nd largest salary
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Use SQL query with ORDER BY and LIMIT to find 2nd largest salary.
• Use ORDER BY clause to sort salaries in descending order

• Use LIMIT 1,1 to get the second row after skipping the first row
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Q2. High level system design for a movie booking app
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A movie booking app system design involves user authentication, movie selection, seat reservation, payment processing, and booking confirmation.
• User authentication: Implement login/signup functionality for users.

• Movie selection: Display list of movies with details like showtimes, ratings, and genres.

• Seat reservation: Allow users to select seats for chosen movie showtime.

• Payment processing: Integrate payment gateway for...read more
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Questions specific to tech stak mentioned in Resume

2 intermidiate DS coding questions

Q1. Questions based on skill sets
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Q1. System design questions including design DB schema
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Q1. What is the use of pretty in JavaScript
Ans. 
The pretty function in JavaScript is used to format and display data in a more visually appealing way.
• Pretty function is used to format JSON data for better readability.

• It can be used to display data in a structured and organized manner.

• Pretty function is commonly used in debugging to make output easier to read.
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Q2. What are the features of Date and Time API in Java 8
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Java 8 Date and Time API provides improved date and time handling capabilities.
• Introduction of new classes like LocalDate, LocalTime, LocalDateTime, ZonedDateTime, OffsetTime, OffsetDateTime, and Instant for better date and time manipulation

• Support for time zones and offsets

• Ability to perform date and time calculations easily

• Enhanced formatting and parsing capabilities

• Integration with existing date and time classes lik
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Q3. What are SOLID principles?
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SOLID principles are a set of five design principles that help make software designs more understandable, flexible, and maintainable.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its sub...read more
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Q1. Question related to the core java
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Q2. Feature of Java 8
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Java 8 introduced 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 work with sequences of elements efficiently.

• Default methods allow interfaces to have methods with implementation.

• Example: List names = Ar...read more
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Q3. What is multi threading?
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Multi threading is a programming concept where multiple threads within a process execute concurrently, allowing for better performance and responsiveness.
• Allows for parallel execution of tasks within a single process

• Improves performance by utilizing multiple CPU cores

• Can lead to synchronization issues if not handled properly

• Examples include web servers handling multiple client requests simultaneously
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Q4. How collections works internally?
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Collections in programming languages are data structures that store and organize multiple elements.
• Collections can be implemented using various data structures such as arrays, linked lists, hash tables, and trees.

• They provide methods for adding, removing, and accessing elements efficiently.

• Examples of collections in Java include ArrayList, LinkedList, HashMap, and TreeSet.
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Q1. Questions related to the Spring framework
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