Coforge Team Lead Interview Questions and Answers

Q1. Performance optimisation
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Q1. Lods,parameters
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Q1. Sql queries on analytical queries
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Q2. Different constraints and join methods
Ans. 
Different constraints and join methods in database queries
• Constraints in database queries ensure data integrity and enforce rules on data

• Join methods in database queries are used to combine rows from two or more tables based on a related column between them

• Examples of constraints include primary key, foreign key, unique key, and check constraints

• Examples of join methods include inner join, outer join (left, right, full
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It was mostly on sub queries.

Q1. Waste of time to go Mphasis
Ans. 
It depends on individual circumstances and career goals.
• Going to Mphasis may not be a waste of time if it aligns with your career goals and offers valuable experience.

• Consider factors such as job role, growth opportunities, work culture, and learning potential before making a decision.

• Some people may find Mphasis to be a valuable stepping stone in their career, while others may not see it as beneficial.

• Ultimately, the ...read more
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Q1. Write a join in sql
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A SQL join is used to combine rows from two or more tables based on a related column between them.
• Use the JOIN keyword to specify the tables to be joined

• Use the ON keyword to specify the column to join on

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
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Q2. Java related many questions
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Q1. Explain your project in details
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Q2. Write 2 any joins in sql
Ans. 
Two common SQL joins are INNER JOIN and LEFT JOIN.
• INNER JOIN: Returns rows when there is at least one match in both tables.

• LEFT JOIN: Returns all rows from the left table and the matched rows from the right table.
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Q1. How are you doing
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Q2. Which was your previous institution
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Q1. HOW JVM works ?
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JVM is a virtual machine that executes Java bytecode. It manages memory, provides security, and facilitates garbage collection.
• JVM loads the bytecode generated by the Java compiler and interprets it.

• It uses Just-In-Time (JIT) compilation to improve performance by compiling frequently used code into native machine code.

• JVM manages memory through garbage collection, freeing up memory occupied by objects that are no longe...read more
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Q2. Hash Map internal working?
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Hash Map is a data structure that stores key-value pairs and uses a hash function to map keys to their corresponding values.
• Hash Map uses a hash function to determine the index of the key-value pair in the underlying array.

• Collisions can occur when multiple keys hash to the same index, which can be resolved using techniques like chaining or open addressing.

• Hash Map provides constant time complexity O(1) for insertion,
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Q1. What is stereo annotation ?
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Stereo annotation is the process of labeling or tagging images or videos with depth information to create a 3D effect.
• Stereo annotation involves identifying corresponding points in a pair of images or frames to determine depth perception.

• It is commonly used in computer vision tasks such as object detection, tracking, and scene understanding.

• Examples of stereo annotation include creating depth maps for autonomous drivin
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Q2. Muti threading.
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Q1. Basic java 8 questions
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