CETPA InfoTech Embedded System Developer Interview Questions and Answers for Freshers

Q1. Why strings are immutable
Ans. 
Strings are immutable to ensure data integrity and security by preventing accidental or intentional modification.
• Immutable strings prevent accidental changes to data

• Enhances security by preventing data tampering

• Allows for efficient memory management
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Q2. Count the number of repeated words from the given string
Ans. 
Count the number of repeated words in a given string
• Split the string into words using a delimiter like space

• Create a hashmap to store word frequencies

• Iterate through the words and update the hashmap accordingly

• Count the number of words with frequency greater than 1
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Q1. What is abstract class?
Ans. 
Abstract class is a class that cannot be instantiated and may contain abstract methods.
• Cannot be instantiated directly

• May contain abstract methods that must be implemented by subclasses

• Can have both abstract and non-abstract methods

• Used for creating a template for other classes to inherit from
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Q2. What is sub query and Like operator?
Ans. 
A subquery is a query nested within another query, and the LIKE operator is used in SQL to search for a specified pattern in a column.
• A subquery is enclosed in parentheses and executed first before the main query.

• The result of a subquery can be used in comparison with the main query's result.

• The LIKE operator is used with the WHERE clause to search for a specified pattern in a column.

• The LIKE operator allows for wildca...read more
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Q1. Tell Me about Yourself
Ans. 
I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills and ability to work in a team

• Completed multiple projects including a web-based inventory management system
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Q2. Question From OOPS Consept
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Q1. Ask About Web Form
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Q2. SQL Question like Relation
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Q1. Java coding and development
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Q2. Db and development skills
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Difficulty level is medium

Q1. Medium about java and database
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Q1. Medium level - about project
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Q1. 1mcq 2techincal Hr 3.coding 4.manager round 5.hr
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Q2. Java basics,oops,collection,sql joins
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Competitive coding, multiple choice questions

Q1. CS fundamentals, Object oriented programming, Networking, SQL
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Q2. Explain 4 concept of OOPS
Ans. 
OOPS concepts include 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 to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.
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Q3. Explain subnet in networking
Ans. 
A subnet is a smaller network within a larger network, created by dividing the IP address range of the larger network.
• Subnets help in organizing and managing network resources efficiently.

• They allow for better security by isolating different parts of the network.

• Subnets can be created by dividing an IP address range into smaller ranges.

• For example, a company may have different subnets for different departments like HR,...read more
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Q4. Concepts of Operating system
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Q1. Behavioral questions, questions related to project, questions related to internship
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