Java Mock Tests - Top Interview Questions & Placement Prep

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Java MCQ Status Update

We've uploaded MCQs for core Java topics. Advanced topics will be added soon. Keep practicing!

Complete Java Programming Guide

All essential Java concepts with MCQs for interviews & placements

1

Java Basics

Data Types & Variables Operators Control Flow Arrays

2

OOP Concepts

Abstraction Encapsulation Inheritance Polymorphism

3

Exception Handling

try-catch-finally Checked vs Unchecked Custom Exceptions

4

Collections Framework

List vs Set vs Map ArrayList vs LinkedList HashMap Internals Concurrent Collections Comparable vs Comparator

5

Java 8 Features

Lambda Expressions Stream API Functional Interfaces Optional Class Date/Time API

6

Java 9 Features

Module System (Jigsaw) Factory Methods for Collections Private Interface Methods HTTP/2 Client

7

Java 10 Features

Local-Variable Type Inference (var) Garbage Collector Interface Application Class-Data Sharing

8

Java 11 Features

HTTP Client API Launch Single-File Programs String New Methods Nest-Based Access Control

9

Java 12-17 Features

Switch Expressions (12,13,14) Text Blocks (13,14,15) Records (14,15,16) Sealed Classes (15,16,17) Pattern Matching (14,16,17)

10

Memory Management

Heap vs Stack Garbage Collection JVM Architecture

11

String Handling

String Pool Concept String vs StringBuilder Immutable Nature

12

Interview Questions

Common Java Questions Problem Solving Scenario-based