ZeMoSo Technologies Principal Software Engineer Interview Questions and Answers

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
Ans. 
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...read more
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Q3. What are SOLID principles?
Ans. 
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
Ans. 
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<String&...read more
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Q3. What is multi threading?
Ans. 
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?
Ans. 
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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Online test with 8 questions mostly related to the technology applied for

Q1. How to sort an array and complexity
Ans. 
Sorting an array of strings using a sorting algorithm like quicksort or mergesort.
• Use a sorting algorithm like quicksort or mergesort to sort the array of strings.

• Ensure the sorting algorithm is efficient and has a time complexity of O(n log n).

• Consider the space complexity of the sorting algorithm as well.
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Q1. Code review of given java classes
Ans. 
Reviewing Java classes for code quality and best practices
• Check for proper naming conventions and readability of code

• Ensure that the code follows SOLID principles and design patterns

• Look for potential bugs, performance issues, and security vulnerabilities

• Verify that the code is well-documented and includes appropriate comments

• Evaluate the test coverage and quality of unit tests
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