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With this course, you will:

Practice 100 interview questions
Practice with coding exerises
Earn a professional certificate

Average Salary (US)

$96,864

Prerequisites

Average Salary (US)

$96,864

Prerequisites

Start Now!

Enroll to Get Started

Course

Java Interview Questions

Ace your coding interview with this comprehensive and curated course of the most important Java interview questions.

Level: Intermediate
Duration: 2 weeks
Type: Interactive
Language: English
Practice Problems: 60+

Chapter 1:

Introduction

1.1Introduction to Course

Chapter 2:

Basics

2.1Find the Smallest Element in an Array 2.2Check Whether a Number is Prime or Not 2.3Number of Vowels in a String 2.4Length of the String 2.5Reverse a Given String 2.6Second Largest Element in an Array 2.7Find Factorial of a Number 2.8Remove Spaces From a String 2.9Swap two numbers Without Using the Third Variable 2.10Count Number of Digits in a Number 2.11Find Nth Fibonacci Number 2.12Toggle the Case of Every Character in the String 2.13Calculate the Number of Times a Digit Appears in a Number 2.14Separate 0's and 1's from an Array 2.15Separate Even and Odd Numbers in an Array 2.16Count the Number of Capital Letters in a String 2.17Sum of Largest and Smallest Element in an Array 2.18Find x Power n Using Recursion 2.19Reverse an Array Without Using the reverse() Method 2.20Check Whether a String is Palindrome or Not 2.21Check Two Strings are Anagrams or not 2.22Find the Index of the First and the Last Occurrence of an Element

Chapter 3:

Intermediate

3.1Find Unique Character in a String 3.2Check Whether Given Number is Armstrong or Not 3.3Minimum Characters to Make a String Palindrome 3.4Find Missing Number in a Number Sequence 3.5Print Repeated Elements in a String

Chapter 4:

Advanced

4.1Find Leaders in an Array 4.2Check If A Given String Is A Palindrome 4.3Count the Number of Words in a String Using HashMap 4.4Check Whether a String is a Valid Email Address 4.5Permutation of a String 4.6Find Longest Palindromic Substring in a Given String 4.7Combinations of List Elements Whose Sum Equals the Target Value

Chapter 5:

Theory Questions

5.1Java Virtual Machine(JVM)5.2Types of Memory Area Allocated by JVM 5.3JIT Compiler 5.4Exceptions in Java 5.5Static and Non-Static Method 5.6Final Variable, Method and Class 5.7No Pointers in Java 5.8Overloading the main() Method 5.9JVM, JRE, JDK 5.10Wrapper Class 5.11Making a Constructor final 5.12Difference Between an Interface and an Abstract Class 5.13Java Functional Interface 5.14Multiple Inheritance not Supported in Java 5.15Difference Between "throw" and "throws"5.16Overriding Static Method 5.17Overriding an Overloaded Method 5.18Does a class Inherit Constructors of its Superclass?5.19Create Instances When Constructor is not Defined 5.20main() Method in Java 5.21equals() Method and == operator 5.22Garbage Collection in Java 5.23HashMap and Hashtable 5.24Local Variable and Instance Variable 5.25Heap Memory and Stack Memory 5.26main() isn't Declared as static 5.27String, StringBuilder, StringBuffer 5.28Multithreading in Java 5.29final, finalize and finally 5.30Enums 5.31System Class 5.32Global Variables 5.33Synchronized Methods or Blocks 5.34Iterator and ListIterator 5.35Polymorphism

Start this Course

Don't just read questions

Solve questions asked in real interviews

Create a program to check if the given number is prime.

Instructions

Initialize two variables: num1 with value 29 and flag with value true.
Loop from i = 2 to i = num -1.
Inside it, check if num is divisible by i.
If yes, change flag to false and terminate the loop.
Print the value of flag outside the loop.

Example

The output of the program will be:

true

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