Gp Petroleums Interview Questions and Answers

Q1. Introduce yourself in brief ?
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Q2. Explain boiler, types of heat transfer, etc ?
Ans. 
Boiler is a closed vessel in which water is heated to produce steam. Types of heat transfer include conduction, convection, and radiation.
• Boiler is a closed vessel that uses heat from combustion or electricity to generate steam.

• Types of heat transfer in boilers include conduction (direct contact), convection (fluid movement), and radiation (electromagnetic waves).

• Examples of boilers include fire-tube boilers, water-tub
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Tricky questions from js, sql, c#

Q1. Uses of B Tree
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B Trees are used for indexing in databases and file systems.
• Used for efficient searching, insertion, and deletion operations in databases.

• Helps in maintaining sorted data for quick retrieval.

• Commonly used in file systems to store large amounts of data efficiently.

• Each node in a B Tree can have multiple children, reducing the height of the tree.
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Q2. What is CTE in sql
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CTE stands for Common Table Expression in SQL, used to create temporary result sets that can be referenced within a SELECT, INSERT, UPDATE, or DELETE statement.
• CTEs improve readability and maintainability of complex queries

• CTEs can be recursive, allowing for hierarchical data querying

• CTEs are defined using the WITH keyword followed by the CTE name and query
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Q1. Program to reverse a linked list
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Reverse a linked list by changing the next pointers of each node to point to the previous node.
• Start with three pointers: current, prev, and next.

• Iterate through the linked list, updating the next pointers to point to the previous node.

• Update prev, current, and next pointers in each iteration until the end of the list is reached.
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Q2. Puzzles from geeksforgeeks
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Q1. General HR questions like difficulties, strength weakness etc.
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