Visionet Systems Analyst Interview Questions and Answers

120 minutes,aptitude,basic programming questions,three c problems from easy medium to hard

Q1. SQL QUERIES nested and joins
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Q2. Internships projects questions and tech stacks
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Q1. Explain maps in Java
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Maps in Java are data structures that store key-value pairs and allow for efficient retrieval and manipulation of data.
• Maps in Java are implemented by classes like HashMap, TreeMap, and LinkedHashMap.

• They allow you to store unique keys and their corresponding values.

• You can retrieve values from a map using the key, and also update or remove key-value pairs.

• Example: HashMap<String, Integer> map = new HashMap<&g...read more
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Q2. Concurrency in Java
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Concurrency in Java allows multiple tasks to be executed simultaneously, improving performance and responsiveness.
• Concurrency in Java is achieved through the use of threads.

• Threads allow different parts of a program to run concurrently.

• Java provides built-in support for concurrency with classes like Thread and Executor.

• Concurrency can help improve performance by utilizing multiple CPU cores efficiently.

• However, concurr...read more
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