Group 19 — Modern Java Features (Java 10, 14, 17, 21)

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Qubits of DPK

April 11, 2026

Core Java
This group covers modern Java version features that are heavily asked in MAANG interviews.
Subpages:
  • var keyword (Java 10)
  • Switch Expression (Java 14+)
  • Sealed Classes (Java 17)
  • Record Classes (Java 17)
  • JDK 21 — Virtual Threads, Pattern Matching & More
  • JUnit 5 Basics
Sector 1

var Keyword — Java 10 Feature

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Sector 2

Switch Expression — Java 14+ Feature

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Sector 3

Sealed Classes — Java 17 Feature

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Sector 4

Record Classes — Java 17 Feature

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Sector 5

JDK 21 — Virtual Threads, Pattern Matching & Key Features

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Sector 6

JUnit 5 — Testing in Java

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