Sunera Technologies Engineer Trainee Interview Questions and Answers

Q1. Internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• HashMap uses the hashCode() method of ke...read more
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Q2. What are the feature of jdk 8
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JDK 8 features include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces enable the use of lambda expressions.

• Streams provide a way to work with sequences of elements efficiently.

• Default methods allow interfaces to have concrete methods.

• Date and Time API improvements.
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Q1. Power BI DAX calculations
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Q1. RLS Implementation
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Q1. Difference between deep and shallow copy
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Deep copy creates a new object and recursively copies all nested objects, while shallow copy creates a new object and copies the references to nested objects.
• Deep copy duplicates all levels of the object hierarchy, ensuring that changes in the copied object do not affect the original object.

• Shallow copy only duplicates the top-level object, so changes in the copied object may affect the original object.

• Deep copy is mor...read more
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Q2. Ways to set values in form groups
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Ways to set values in form groups
• Use setValue() method to set values in form groups

• Use patchValue() method to set values in form groups

• Use reset() method to set values in form groups
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Q3. How to add dynamic component in view
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To add a dynamic component in a view, use a framework or library that supports dynamic rendering and component creation.
• Use a framework like React or Angular that allows for dynamic component creation

• Create a component factory or use a component resolver to dynamically create and render components

• Pass data or props to the dynamic component to customize its behavior

• Update the view or component tree to include the dynami
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Q1. All Concurrent Utility Classes and their uses.
Ans. 
Concurrent Utility Classes provide support for concurrent programming in Java.
• ConcurrentHashMap: Thread-safe implementation of Map interface.

• CopyOnWriteArrayList: Thread-safe implementation of List interface.

• CountDownLatch: Synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.

• Semaphore: Controls the number of threads that can access a shared re...read more
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Q2. Basic SQL queries, mostly from Joins, Grouping
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Q3. Core Java, Java 8
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Try to clear the aptitude there is more chances of getting selected

Q1. Know everything whatever you write in resume
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Q2. About the mini project and some real time problems
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Easy and coding good. Prepare for the verbal, reasoning, aptitude and all thr things stuf required practice coding there are coding question unlike dont waste tym practice everyday coding its good

Q1. The interviewer is so nice and friendly he asked basics of programming how to do coding. They asked Python? C programming? Oops concept ? All the things Tell me about yourself and they testing our comm...read more
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Q2. Tell me about yourself and goals and strength and weakness coding questions
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Q3. About well known programming language
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Prepare a solution to generate BOM

Q1. How much overall experience you had
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Q2. Specific to the domain how much experience
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Q3. Are you able to handle this as stand-alone member
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