Pennant Technologies Java Developer Interview Questions and Answers

Q1. Regrading Self join query
Ans. 
A self join query is used to join a table to itself in a SQL query.
• Self join is used when a table needs to be joined with itself to compare rows within the same table.

• It requires aliasing the table with different names to distinguish between the two instances of the same table.

• Commonly used in hierarchical data structures or when comparing related rows in a table.
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Q2. Group by query per catagory
Ans. 
Group by query is used to group data based on a specific category.
• Use the GROUP BY clause in SQL to group data based on a specific column

• Aggregate functions like COUNT, SUM, AVG can be used with GROUP BY to perform calculations on grouped data

• Example: SELECT category, COUNT(*) FROM products GROUP BY category
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Quantitative arithmetic,verbal reasoning,non-verbal reasoning,etc

Q1. Java related question
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Q2. Web services related question
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Q1. Project related question
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Good and easy most of the question are reapeted

Arrays, string, constructors in basic to medium level

Q1. Questions based on the resume in technical way
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Q2. Oops concept dbms string data structures
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Q1. General HR questions in easy level
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It placed in hackerRank.question difficulty level was medium.

Q1. The difficulty depends upon who is taking your interview. But mostly asked questions were related to string and hashmap.
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Q1. It was more like a little bit technical and hr round. Mostly talk about personal profile like education,family background, hobbies and etc.
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English test written english vocabulary test

Time duration profit loss average share statistics

Q1. Why public static use
Ans. 
public static use for accessing methods and variables without creating an object
• Allows access to methods and variables without creating an object

• Useful for utility classes where objects are not needed

• Can be used to create global variables or constants

• Example: Math class in Java has only static methods and constants
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Q2. Why static is use.Pattern question,hshshdhdhxhxhxhxhdhhxjdjdjdjdjnjsjs
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Basic coding excercise , linux platform.file handling

Q1. Simpe question , family baground,
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Q2. Strength , weakness,
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