Vibeosys Software Interview Questions and Answers

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Q1. What is the default index type
Ans. 
B-tree index is the default index type in Oracle database.
• Default index type in Oracle is B-tree index

• B-tree index is suitable for range queries and equality searches

• Other index types in Oracle include bitmap index and function-based index
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Q2. What is the causes of query slowness
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Causes of query slowness can include inefficient queries, lack of indexes, outdated statistics, hardware limitations, and network latency.
• Inefficient queries - poorly written queries that do not utilize indexes or join tables unnecessarily

• Lack of indexes - missing indexes on columns frequently used in queries

• Outdated statistics - outdated or inaccurate statistics can lead to poor query execution plans

• Hardware limitatio...read more
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Q3. How to resolve query slowness
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To resolve query slowness, analyze query execution plan, optimize indexes, update statistics, consider partitioning.
• Analyze query execution plan to identify bottlenecks

• Optimize indexes to improve query performance

• Update statistics to ensure the query optimizer has accurate information

• Consider partitioning large tables to improve query performance
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Q1. Introduction yourself
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I am a dedicated PL/SQL developer with 5 years of experience in designing and implementing database solutions.
• Experienced in writing complex PL/SQL queries and stored procedures

• Proficient in performance tuning and optimization of SQL queries

• Skilled in database design and normalization principles

• Familiar with Oracle database technologies such as triggers and packages
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Q2. What is join and its types
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Join is used to combine rows from two or more tables based on a related column between them.
• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL 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

• RIGHT JOIN returns all rows from the right table and the matched rows from the left table

• FULL JOIN r...read more
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Aptitude test is based on logical questions and small programs

Q1. All basics of core java and whatever you written in resume. ask about the your last projects. difference between then map, array list, collection, set etc.
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Q2. General questions about the andorid studio. ask some logical questions
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Q1. This will be HR round. general hr questions
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Q1. Question Based on Linked List
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Q2. Question based on array
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Q1. What is MVC in Rails
Ans. 
MVC in Rails stands for Model-View-Controller, a design pattern that separates the application into three interconnected components.
• Model: Represents the data and business logic of the application

• View: Represents the user interface of the application

• Controller: Handles user input, interacts with the model, and updates the view

• Promotes code organization and separation of concerns
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Q2. What is active record
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Active Record is an object-relational mapping (ORM) pattern in Ruby on Rails that simplifies database interactions.
• ORM pattern in Ruby on Rails

• Maps database tables to Ruby objects

• Provides methods for querying and manipulating data

• Example: User model in Rails represents users table in database
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Q3. Simple programming coding ques
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Q1. About projects you have done
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Q1. Basic exp details
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Q2. Salary expectations
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Inventory based task for web app

Q1. Overall exp discussion with CEO
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Q1. Difference between list and set , different data types in python , questions on dictionary
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Q2. SQL and table related questions and project discussion
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Q1. Educational Background
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