[Free] How To Clear Technical Java Interview In An Hour
Make Yourself Java interview ready – Free Course
What you’ll learn
- Will Make You Ready For Any Java Interview
Requirements
- You Must Have a basic knowledge about the Core Java
- Just a computer with you to practise
Description
Note:- This is just a course to give you an idea about questions in a short span of time. You won’t be finding in-depth explanations of topics.How about Quickly Revising all the Important Java Concepts in about 1 Hour before an interview?
Preparing for Java Interview is tricky. You would need to get a good understanding of new features and revise concepts you used in your preparation. This course helps you Prepare for a Java Interview covering 100+ Java Interview Questions and Answers on a varied range of topics listed below.
COURSE HIGHLIGHTS:
Java Platform
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1 . Why is Java so popular?
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2 . What is platform independence?
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3 . What is bytecode?
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4 . Compare JDK vs JVM vs JRE
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5 . What are the important differences between C++ and Java?
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6 . What is the role for a classloader in Java?
Wrapper Classes
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7 . What are Wrapper classes?
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8 . Why do we need Wrapper classes in Java?
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9 . What are the different ways of creating Wrapper class instances?
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10 . What are differences in the two ways of creating Wrapper classes?
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11 . What is auto boxing?
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12 . What are the advantages of auto boxing?
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13 . What is casting?
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14 . What is implicit casting?
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15 . What is explicit casting?
Strings
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16 . Are all Strings immutable?
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17 . Where are String values stored in memory?
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18 . Why should you be careful about String concatenation(+) operator in loops?
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19 . How do you solve above problem?
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20 . What are differences between String and StringBuffer?
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21 . What are differences between StringBuilder and StringBuffer?
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22 . Can you give examples of different utility methods in String class?
Object oriented programming basics
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23 . What is a class?
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24 . What is an object?
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25 . What is state of an object?
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26 . What is behavior of an object?
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27 . What is the super class of every class in Java?
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28 . Explain about toString method ?
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29 . What is the use of equals method in Java?
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30 . What are the important things to consider when implementing equals method?
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31 . What is the Hashcode method used for in Java?
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32 . Explain inheritance with examples .
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33 . What is method overloading?
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34 . What is method overriding?
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35 . Can super class reference variable can hold an object of sub class?
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36 . Is multiple inheritance allowed in Java?
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37 . What is an interface?
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38 . How do you define an interface?
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39 . How do you implement an interface?
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40 . Can you explain a few tricky things about interfaces?
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41 . Can you extend an interface?
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42 . Can a class extend multiple interfaces?
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43 . What is an abstract class?
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44 . When do you use an abstract class?
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45 . How do you define an abstract method?
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46 . Compare abstract class vs interface?
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47 . What is a constructor?
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48 . What is a default constructor?
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49 . Will this code compile?
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50 . How do you call a super class constructor from a constructor?
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51 . Will this code compile?
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52 . What is the use of this()?
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53 . Can a constructor be called directly from a method?
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54 . Is a super class constructor called even when there is no explicit call from a sub class constructor?
Advanced object oriented concepts
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55 . What is polymorphism?
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56 . What is the use of instanceof operator in Java?
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57 . What is coupling?
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58 . What is cohesion?
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59 . What is encapsulation?
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60 . What is an inner class?
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61 . What is a static inner class?
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62 . Can you create an inner class inside a method?
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63 . What is an anonymous class?
Modifiers
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64 . What is default class modifier?
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65 . What is private access modifier?
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66 . What is default or package access modifier?
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67 . What is protected access modifier?
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68 . What is public access modifier?
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69 . What access types of variables can be accessed from a class in same package?
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70 . What access types of variables can be accessed from a class in different package?
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71 . What access types of variables can be accessed from a sub class in same package?
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72 . What access types of variables can be accessed from a sub class in different package?
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73 . What is the use of a final modifier on a class?
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74 . What is the use of a final modifier on a method?
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75 . What is a final variable?
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76 . What is a final argument?
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77 . What happens when a variable is marked as volatile?
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78 . What is a static variable?
conditions & loops
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79 . Why should you always use blocks around if statement?
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80 . Guess the output
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81 . Guess the output
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82 . Guess the output of this switch block .
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83 . Guess the output of this switch block?
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84 . Should default be the last case in a switch statement?
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85 . Can a switch statement be used around a String
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86 . Guess the output of this for loop
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87 . What is an enhanced for loop?
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88 . What is the output of the for loop below?
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89 . What is the output of the program below?
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90 . What is the output of the program below?
Exception handling
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91 . Why is exception handling important?
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92 . What design pattern is used to implement exception handling features in most languages?
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93 . What is the need for the finally block?
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94 . In what scenarios is code finally not executed?
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95 . Will finally be executed in the program below?
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96 . Is try without a catch is allowed?
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97 . Is try without catch and finally allowed?
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98 . Can you explain the hierarchy of exception handling classes?
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99 . What is the difference between error and exception?
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100 . What is the difference between checked exceptions and unchecked exceptions?
And Many More Questions mixed with the concept.
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