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Java Programming Interview Questions
96.
Check if a given string is palindrome using recursion.
97.
Write a Java Program to print Fibonacci Series using Recursion.
98.
Write a Java program to check if the two strings are anagrams.
99.
Write a Java Program to find the factorial of a given number.
100.
Given an array of non-duplicating numbers from 1 to n where one number is missing, write an efficient java program to find that missing number.
101.
Write a Java Program to check if any number is a magic number or not. A number is said to be a magic number if after doing sum of digits in each step and inturn doing sum of digits of that sum, the ultimate result (when there is only one digit left) is 1.
102.
Write a Java program to create and throw custom exceptions.
103.
Write a Java program to reverse a string.
104.
Write a Java program to rotate arrays 90 degree clockwise by taking matrices from user input.
105.
Write a java program to check if any number given as input is the sum of 2 prime numbers.
106.
Write a Java program for solving the Tower of Hanoi Problem.
107.
Implement Binary Search in Java using recursion.

Java Interview Questions Java Interview

December 21, 2022December 24, 2022 softwaretechit

Java Intermediate Interview Questions

Java Intermediate Interview Questions
31.
Apart from the security aspect, what are the reasons behind making strings immutable in Java?
32.
What is a singleton class in Java? And How to implement a singleton class?
33.
Which of the below generates a compile-time error? State the reason.
34.
How would you differentiate between a String, StringBuffer, and a StringBuilder?
35.
Using relevant properties highlight the differences between interfaces and abstract classes.
36.
Is this program giving a compile-time error? If Yes then state the reason and number of errors it will give. If not then state the reason.
37.
What is a Comparator in java?
38.
In Java, static as well as private method overriding is possible. Comment on the statement.
39.
What makes a HashSet different from a TreeSet?
40.
Why is the character array preferred over string for storing confidential information?
41.
What do we get in the JDK file?
42.
What are the differences between JVM, JRE and JDK in Java?
43.
What are the differences between HashMap and HashTable in Java?
44.
What is the importance of reflection in Java?
45.
What are the different ways of threads usage?
46.
What are the different types of Thread Priorities in Java? And what is the default priority of a thread assigned by JVM?
47.
What is the difference between the program and the process?
48.
What is the difference between the ‘throw’ and ‘throws’ keyword in java?
49.
What are the differences between constructor and method of a class in Java?
50.
Identify the output of the below java program and Justify your answer.
51.
Java works as “pass by value” or “pass by reference” phenomenon?
52.
What is the ‘IS-A ‘ relationship in OOPs java?
53.
Which among String or String Buffer should be preferred when there are lot of updates required to be done in the data?
54.
How to not allow serialization of attributes of a class in Java?
55.
What happens if the static modifier is not included in the main method signature in Java?
56.
Consider the below program, identify the output, and also state the reason for that.
57.
Can we make the main() thread a daemon thread?
58.
What happens if there are multiple main methods inside one class in Java?
59.
What do you understand by Object Cloning and how do you achieve it in Java?
60.
How does an exception propagate in the code?
61.
How do exceptions affect the program if it doesn’t handle them?
62.
Is it mandatory for a catch block to be followed after a try block?
63.
Will the finally block get executed when the return statement is written at the end of try block and catch block as shown below?
64.
Can you call a constructor of a class inside the another constructor?
65.
Contiguous memory locations are usually used for storing actual values in an array but not in ArrayList. Explain.
66.
Why does the java array index start with 0?
67.
Why is the remove method faster in the linked list than in an array?
68.
How many overloaded add() and addAll() methods are available in the List interface? Describe the need and uses.
69.
How does the size of ArrayList grow dynamically? And also state how it is implemented internally.

Interview Questions Java Java Interview

December 20, 2022January 14, 2023 softwaretechit

Java 8 Interview Questions for Freshers

Java 8 Interview Questions for Freshers
1.
Describe the newly added features in Java 8?
2.
In which programming paradigm Java 8 falls?
3.
What are the significant advantages of Java 8?
4.
What is MetaSpace? How does it differ from PermGen?
5.
What are functional or SAM interfaces?
6.
Can a functional interface extend/inherit another interface?
7.
What is the default method, and why is it required?
8.
What are static methods in Interfaces?
9.
What are some standard Java pre-defined functional interfaces?
10.
What are the various categories of pre-defined function interfaces?
11.
What is the lambda expression in Java and How does a lambda expression relate to a functional interface?
Java 8 Interview Questions for Experienced
12.
What is the basic structure/syntax of a lambda expression?
13.
What are the features of a lambda expression?
14.
What is a type interface?
15.
What are the types and common ways to use lambda expressions?
16.
In Java 8, what is Method Reference?
17.
What does the String::ValueOf expression mean?
18.
What is an Optional class?
19.
What are the advantages of using the Optional class?
20.
What are Java 8 streams?
21.
What are the main components of a Stream?
22.
What are the sources of data objects a Stream can process?
23.
What are Intermediate and Terminal operations?
24.
What are the most commonly used Intermediate operations?
25.
What is the stateful intermediate operation? Give some examples of stateful intermediate operations.
26.
What is the most common type of Terminal operations?
27.
What is the difference between findFirst() and findAny()?
28.
How are Collections different from Stream?
29.
What is the feature of the new Date and Time API in Java 8?
30.
What are the important packages for the new Data and Time API?
31.
Explain with example, LocalDate, LocalTime, and LocalDateTime APIs.
32.
Define Nashorn in Java 8
33.
What is the use of JJS in Java 8?