Luxoft Interview Questions and Answers

Q1. Java 8 feature and explain about each one with examples
Ans. 
Java 8 introduced several new features such as lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions: Allow you to pass functions as arguments to methods, making your code more concise and readable.

• Functional interfaces: Interfaces with a single abstract method, used to implement lambda expressions.

• Streams: Provide a way to work with sequences of elements and perform operations such...read more
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Q2. Kafka work flow
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Q1. About role and responsibilties
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Q2. About current pterosaurs project deeply
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Q3. Aboit deployment
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Q4. About agile methodology
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Q5. About database( MongoDb)
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Q1. Ways to send data from JCL to COBOL
Ans. 
Data can be sent from JCL to COBOL using parameters, files, or shared memory.
• Passing parameters through JCL PROC statement

• Writing data to a file in JCL and reading it in COBOL program

• Using shared memory to communicate between JCL and COBOL
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Q2. What are cursors?
Ans. 
Cursors are database objects used to retrieve data from result sets one row at a time.
• Cursors are used in database management systems to navigate through a result set.

• They allow for processing individual rows of a result set instead of fetching the entire set at once.

• Cursors can be used in SQL queries to perform operations on each row of a result set.
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Q3. Checkpoint in Db2
Ans. 
Checkpoint in Db2 is a mechanism used to ensure data consistency during recovery.
• Checkpoints are used to write all modified data from the buffer pool to the disk.

• They help in reducing the amount of work needed during database recovery.

• Checkpoints can be triggered manually or automatically based on configuration settings.
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Q1. Overall experience
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Q1. JAVA based questions, some advanced question on designing etc..
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Q1. Spark Architecture
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Q2. Explain the Spark architecture with example
Ans. 
Spark architecture includes driver, cluster manager, and worker nodes for distributed processing.
• Spark architecture consists of a driver program that manages the execution of tasks on worker nodes.

• Cluster manager is responsible for allocating resources and scheduling tasks across worker nodes.

• Worker nodes execute the tasks and store data in memory or disk for processing.

• Example: In a Spark application, the driver progr...read more
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Q1. OOP, SQL, Collection, algorithms, threads
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Unix and SQL based questions

Q1. Unix and SQL based questions, along with previous work experience
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Q2. Mv ,cd ,cp,vi editor, scriptingetc
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Q3. DML,DCL,TCL,stored procedure etc
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Q1. Based on work experience and some basic questions like why are you leaving your present company etc
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