Spectral Consultants Interview Questions and Answers

Q1. Do you have any experience into recruitment?
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How can you manage daily travelling?

Q1. Difference between functions and stored procedure in SQL.
Ans. 
Functions return a single value while stored procedures can perform multiple operations and return multiple values.
• Functions return a single value while stored procedures can return multiple values.

• Functions are used for computations and return values, while stored procedures are used for executing a series of statements.

• Functions can be called from within SQL statements, while stored procedures are called using the EX...read more
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Q2. Difference between abstract class and Interface in C#
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Abstract class can have implementation details, while interface only contains method signatures.
• Abstract class can have constructors, fields, and methods with implementation details, while interface can only have method signatures.

• A class can inherit from only one abstract class, but can implement multiple interfaces.

• Abstract classes are used when some common functionality needs to be shared among multiple classes, whi...read more
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Q1. String immutable question in java
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Q2. Annotations in Spring boot
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Annotations in Spring Boot are used to simplify the configuration and development of applications.
• Annotations are used to provide metadata about the application's components

• They help in reducing the amount of configuration required

• Examples include @RestController, @Autowired, @RequestMapping
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Q1. SQL questions were asked.
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Q1. Technical questions were asked.
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Q1. Some basic SQL based questions and PySpark questions
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Q2. Coalesce and partition in PySpark
Ans. 
Coalesce reduces the number of partitions in a DataFrame, while repartition increases the number of partitions.
• Coalesce is used to reduce the number of partitions in a DataFrame without shuffling the data

• Repartition is used to increase the number of partitions in a DataFrame and can involve shuffling the data

• Coalesce is more efficient than repartition when reducing partitions as it avoids shuffling
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Q3. Puzzles of get 4 litter of water using 3 litter and 5 litter flask. Famous online puzzle
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