Greenheck India Interview Questions and Answers

Q1. What are oops concepts in java, explain real time scenario
Ans. 
OOPs concepts in Java include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

• Encapsulation hides the implementation details of an object and only exposes necessary information.

• Abstraction allows for the creation of abstract class...read more
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Q2. Uses of interface, inheritance
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Interfaces define contracts for behavior, while inheritance allows for code reuse and polymorphism.
• Interfaces allow for loose coupling and abstraction, enabling multiple implementations of the same behavior.

• Inheritance allows for code reuse and extension of existing classes, reducing code duplication.

• Polymorphism allows objects of different classes to be treated as if they were of the same class, simplifying code and i
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Q3. SQL query for join of tables
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SQL query for joining tables
• Use JOIN keyword to combine two or more tables based on a related column

• Specify the columns to be selected using SELECT keyword

• Use ON keyword to specify the condition for joining the tables

• Different types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN
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Q4. Java concepts used in your project
Ans. 
Used Java concepts such as inheritance, polymorphism, and exception handling in my project.
• Implemented inheritance to create a base class and derived classes with specific functionalities.

• Utilized polymorphism to allow objects of different classes to be treated as if they were of the same class.

• Implemented exception handling to handle errors and prevent program crashes.

• Used interfaces to define a set of methods that a ...read more
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Q5. Overloading vs overriding, practical uses
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Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Overloading is used to provide different ways to call a method with different parameters

• Overriding is used to provide a specific implementation of a method in a subclass

• Overloading is resolved at compile-time while overriding is r...read more
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Basic aptitude knowledge test and job related knowledge test

Q1. Abcd hahhah akkakwk hdhhdhd dhdjjd
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Q2. Jehhshs jejjejej jwjejjwjjw jejjejebueheh
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Q3. Heuuwuw eurjejejej owowvs iwoiwiwie 7euheheu ueuueueue
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Q1. Checking overall interest towards the organisation and position applied for
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Q2. Hsjsjkekekjekekjjjeh hwhhwhsj jajjwjwjw usjwuwjjw uehhwjejwj jwjwjjwjwjw jwjjw
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Q1. About tally how much i know i told to them . I don't have any experience in tally also .
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Q2. What u know about tally say that , if they not confident about you, they ask question otherwise no
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Java ee architecture jdbc jpi jsp

Q1. Any questions about java
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Q2. Any question Related to Java
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Q1. Only Accounts related
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Q1. Accounts related entries
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Q1. Job relative for purchase vendor development
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Q2. Product costing for new parts
Ans. 
Product costing for new parts
• Determine the cost of raw materials and labor required for production

• Include overhead costs such as rent, utilities, and equipment maintenance

• Consider any additional costs such as shipping or packaging

• Compare the cost to market prices to ensure profitability

• Regularly review and adjust costing as needed
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Q3. Zero based costing for new parts
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Zero based costing is a method of cost accounting that involves starting from scratch and justifying every expense.
• Zero-based costing requires a thorough analysis of all costs associated with a new part

• It involves starting from a zero base and justifying every expense

• This method is useful for identifying unnecessary costs and improving efficiency

• Example: A company wants to introduce a new product line and uses zero-bas...read more
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