STULZ INDIA Senior Engineer Interview Questions and Answers

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Q1. Nicely done... friendly Tell me about yourself
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Q2. Where are you from ?
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Q1. Oops related questions
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Q2. C language quizzes
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Technical aspects about linked list,trees, stacks

Topic related to humanities

Q1. Is a valid decimal
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Q2. Return the substring in a main string, which is composition of given string
Ans. 
Find and return all substrings in a main string that match a given string.
• Iterate through the main string and check for matches with the given string

• Use substring function to extract potential matches

• Store all matching substrings in an array and return it
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Mixed conceptual questions from java8, Spring Boot and SQL and microservices

Q1. One round technical question and coding on Java, Java 8, Spring boot,Rest webservices, SQL. Code for rest API using jpa for CRUD.
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Q2. Singleton pattern for thread safety .
Ans. 
Singleton pattern ensures only one instance of a class is created and provides a global point of access to it.
• Use lazy initialization to create the instance only when needed.

• Use synchronized keyword to make the getInstance() method thread-safe.

• Consider using double-checked locking for better performance.

• Use enum to implement singleton pattern as it is inherently thread-safe.
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Q3. Linked list implementation
Ans. 
Linked list is a data structure where each element points to the next element in the sequence.
• Nodes contain data and a reference to the next node

• Insertion and deletion can be done efficiently in a linked list

• Traversal starts from the head node and follows the next pointers
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Q1. Parenthesis balancing question
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Q2. Caching in Hibernate
Ans. 
Caching in Hibernate improves performance by storing frequently accessed data in memory.
• Hibernate supports first-level cache at session level

• Second-level cache can be configured at session factory level

• Caching strategies include read-only, read-write, and transactional

• Cache providers like Ehcache, Infinispan, and Hazelcast can be used
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Q3. Maven scope questions
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Q4. Ci and CD concept
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Q1. Salary negotiation
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IQ test is the first round you need to answer all questions correctly

Q1. Tell me about yourself
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Q2. What will you contribute for the company
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Q1. Tell me about urself Types of Statics equipment u have experience Types of Exchangers,AFCs,vessels jobs and there materials of constructions
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Q2. Requirement of hydrotest
Ans. 
Hydrotest is a pressure test conducted on pipes, vessels, or equipment to ensure their strength and integrity.
• Hydrotest is required to ensure that the equipment can withstand the design pressure and prevent leaks or failures.

• It involves filling the equipment with water or other fluids and pressurizing it to a specified level for a certain duration.

• The pressure is then released, and the equipment is inspected for any le...read more
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Q3. Pressure gauges ranges and requirements.
Ans. 
Pressure gauges are used to measure the pressure of fluids and gases in various industries.
• Pressure gauges come in different ranges depending on the application.

• The range of a pressure gauge should be selected based on the maximum pressure expected in the system.

• The accuracy of the pressure gauge should also be considered when selecting a gauge.

• Pressure gauges should be calibrated regularly to ensure accurate readings.

• ...read more
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Q4. Heaters internal and external tybesheets related
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