Quest Global Senior Software Engineer Interview Questions, Process, and Tips

Q1. Explain singleton design pattern
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Ensures a class has only one instance

• Provides a global point of access to that instance

• Commonly used for logging, caching, database connections, etc.
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Q2. Explain adaptive design pattern
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Adaptive design pattern is a software design pattern that allows objects to change their behavior dynamically.
• Adaptive design pattern involves creating objects that can change their behavior at runtime.

• It allows for flexibility and adaptability in software systems.

• Examples include Strategy pattern, State pattern, and Decorator pattern.
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Q1. Technical Question related to our stream
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Q1. Salary discussions etc
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Q1. Java8 Features Questions about Stream functions and Lambda Expression
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Q2. Microservices & Springboot (Sample code and Annotations)
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Q3. DB Query to find duplicates in a table, keeping first duplicate in answer.
Ans. 
DB query to find duplicates in a table, keeping first duplicate in answer.
• Use GROUP BY clause to group the records by the column(s) that may have duplicates

• Use HAVING clause to filter out groups with only one record

• Use MIN or MAX function to select the first record in each group

• Example: SELECT MIN(id), name, COUNT(*) FROM table GROUP BY name HAVING COUNT(*) > 1
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Q4. Springboot Profiles, Actuators and Response mapping.
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Q5. Code to map Employee Object from List to Hashmap using Stream API functions.
Ans. 
Code to map Employee Object from List to Hashmap using Stream API functions.
• Create a List of Employee objects

• Use stream() method to convert List to Stream

• Use collect() method to convert Stream to HashMap

• Use Collectors.toMap() method to create HashMap

• Pass key and value mapping functions to toMap() method
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Q1. I am in Aviation Testing, so questions were according - what is Do178b
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Q2. MCDC and how did you debug an error
Ans. 
MCDC is a testing technique to ensure all possible combinations of conditions are tested. Debugging involves identifying and fixing errors in the code.
• MCDC stands for Modified Condition/Decision Coverage

• It is a testing technique used to ensure all possible combinations of conditions are tested

• Debugging involves identifying and fixing errors in the code

• To debug an error, I first reproduce the error and then use debuggin...read more
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Q1. Why do you want to switch
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C++ program to find unique string

Q1. Virtual function opps concepts
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Q2. Diamond problem
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Two to four code test see the how to thinge logically

Q1. Basic java and and java 8 code
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Q2. Basic java qution, Java 8 code
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Q3. Related to the framework
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Q4. Related to the requirment
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Q5. Basic idea and concepts of java
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