TCS Communications Informatica Developer Interview Questions, Process, and Tips

Q1. About yourself,project,and basic java concepts
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Q1. Explain bean life cycle
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Bean life cycle refers to the stages a Java bean goes through from creation to destruction.
• Bean is instantiated using a constructor or a factory method

• Bean properties are set using setters or dependency injection

• Bean is initialized using the init method

• Bean can be used for its intended purpose

• Bean is destroyed using the destroy method
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Q2. Container created ,bean instantiated dependency injection ,custom init() method,custom utility methods and destroy
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IT WAS BASIC AND EASY TO SOLVE

Q1. OOPS CONCEPT OF JAVA
Ans. 
OOPS concepts in Java refer to the principles of Object-Oriented Programming such as inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class B extends class A.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: private variables with public getter and setter methods.

• Polymorphism...read more
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Q2. JAVA SPRING BOOT
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Q1. Data types in SQL. Write prime number logical code in SQL
Ans. 
SQL data types and prime number logic code
• SQL data types include integer, float, varchar, etc.

• To write prime number logic in SQL, use a loop to check if a number is divisible by any number less than itself

• Example: DECLARE @num INT = 7; SELECT CASE WHEN COUNT(*) = 2 THEN 'Prime' ELSE 'Not Prime' END FROM (SELECT 1 AS num UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6) AS n
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Q1. Why do you want to join us?
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Q1. How can we break singleton pattern in java?
Ans. 
Singleton pattern can be broken using reflection, serialization, and cloning.
• Reflection can be used to access the private constructor and create multiple instances.

• Serialization can create multiple instances when the object is deserialized.

• Cloning can create a new instance of the singleton object.
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