Pinnacle Infotech Senior Engineer Interview Questions and Answers for Freshers

Q1. Difference between deep and shallow copy
Ans. 
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
Ans. 
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
Ans. 
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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Q1. Power BI DAX calculations
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Q1. RLS Implementation
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Q1. Java 8 vs 7 case studies. Stream vs collections case studies.
Ans. 
Java 8 introduced streams which are more efficient than collections in certain cases.
• Streams are useful for processing large amounts of data in parallel

• Collections are better for small amounts of data or when modifying data

• Java 8's stream API provides a functional programming approach to data processing

• Java 7's collections API is more traditional and imperative

• Example: Using streams to filter and map data from a databa...read more
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Q1. Add one to a given String of number
Ans. 
Add one to a given String of number
• Convert the string to integer, add one, and convert back to string

• Handle edge cases like leading zeros

• Consider using built-in functions like parseInt() and toString()
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Q1. Hash map implementation. exception handling in lambda exp. microservices architecture.
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Q1. Why u want to join?
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Basic coding question and JavaScript in depth questions

Q1. Oops concept in framework
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Q2. What is framework structure
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Q3. Difference between selenium 3 and selenium 4
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