[PDF] Java Interview Guide 200 Interview Questions and Answers

ISBN: ae2962f830

Category: Tutorial


Posted on 2018-01-30, by luongquocchinh.

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Author: Java Interview Guide 200+ Interview Questions and Answers | Category: Video (tutorials, how-to, etc.) | Language: English | ISBN: eae2962f830c4786bfa99edb526d1a79 |

Description: Java Interview Guide 200+ Interview Questions and Answers MP4 Video: AVC 1280x720 Audio: AAC 44KHz 2ch Duration: 6 Hours Lec: 54 901 MB Genre: eLearning Language: English 200+ Java Interview Questions for Beginners 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 Java Interview with hands-on code examples covering 200+ Java Interview Questions and Answers on varied range of topics listed below. Java Platform 1 . Why is Java so popular 2 . What is platform independence 3 . What is bytecode 4 . Compare JDK vs JVM vs JRE 5 . What are the important differences between C++ and Java 6 . What is the role for a classloader in Java Wrapper Classes 7 . What are Wrapper classes 8 . Why do we need Wrapper classes in Java 9 . What are the different ways of creating Wrapper class instances 10 . What are differences in the two ways of creating Wrapper classes 11 . What is auto boxing 12 . What are the advantages of auto boxing 13 . What is casting 14 . What is implicit casting 15 . What is explicit casting Strings 16 . Are all String's immutable 17 . Where are String values stored in memory 18 . Why should you be careful about String concatenation(+) operator in loops 19 . How do you solve above problem 20 . What are differences between String and StringBuffer 21 . What are differences between StringBuilder and StringBuffer 22 . Can you give examples of different utility methods in String class Object oriented programming basics 23 . What is a class 24 . What is an object 25 . What is state of an object 26 . What is behavior of an object 27 . What is the super class of every class in Java 28 . Explain about toString method 29 . What is the use of equals method in Java 30 . What are the important things to consider when implementing equals method 31 . What is the Hashcode method used for in Java 32 . Explain inheritance with examples . 33 . What is method overloading 34 . What is method overriding 35 . Can super class reference variable can hold an object of sub class 36 . Is multiple inheritance allowed in Java 37 . What is an interface 38 . How do you define an interface 39 . How do you implement an interface 40 . Can you explain a few tricky things about interfaces 41 . Can you extend an interface 42 . Can a class extend multiple interfaces 43 . What is an abstract class 44 . When do you use an abstract class 45 . How do you define an abstract method 46 . Compare abstract class vs interface 47 . What is a constructor 48 . What is a default constructor 49 . Will this code compile 50 . How do you call a super class constructor from a constructor 51 . Will this code compile 52 . What is the use of this() 53 . Can a constructor be called directly from a method 54 . Is a super class constructor called even when there is no explicit call from a sub class constructor Advanced object oriented concepts 55 . What is polymorphism 56 . What is the use of instanceof operator in Java 57 . What is coupling 58 . What is cohesion 59 . What is encapsulation 60 . What is an inner class 61 . What is a static inner class 62 . Can you create an inner class inside a method 63 . What is an anonymous class Modifiers 64 . What is default class modifier 65 . What is private access modifier 66 . What is default or package access modifier 67 . What is protected access modifier 68 . What is public access modifier 69 . What access types of variables can be accessed from a class in same package 70 . What access types of variables can be accessed from a class in different package 71 . What access types of variables can be accessed from a sub class in same package 72 . What access types of variables can be accessed from a sub class in different package 73 . What is the use of a final modifier on a class 74 . What is the use of a final modifier on a method 75 . What is a final variable 76 . What is a final argument 77 . What happens when a variable is marked as volatile 78 . What is a static variable conditions & loops 79 . Why should you always use blocks around if statement 80 . Guess the output 81 . Guess the output 82 . Guess the output of this switch block . 83 . Guess the output of this switch block 84 . Should default be the last case in a switch statement 85 . Can a switch statement be used around a String 86 . Guess the output of this for loop 87 . What is an enhanced for loop 88 . What is the output of the for loop below 89 . What is the output of the program below 90 . What is the output of the program below Exception handling 91 . Why is exception handling important 92 . What design pattern is used to implement exception handling features in most languages 93 . What is the need for finally block 94 . In what scenarios is code in finally not executed 95 . Will finally be executed in the program below 96 . Is try without a catch is allowed 97 . Is try without catch and finally allowed 98 . Can you explain the hierarchy of exception handling classes 99 . What is the difference between error and exception 100 . What is the difference between checked exceptions and unchecked exceptions 101 . How do you throw an exception from a method 102 . What happens when you throw a checked exception from a method 103 . What are the options you have to eliminate compilation errors when handling checked exceptions 104 . How do you create a custom exception 105 . How do you handle multiple exception types with same exception handling block 106 . Can you explain about try with resources 107 . How does try with resources work 108 . Can you explain a few exception handling best practices Miscellaneous topics 109 . What are the default values in an array 110 . How do you loop around an array using enhanced for loop 111 . How do you print the content of an array 112 . How do you compare two arrays 113 . What is an enum 114 . Can you use a switch statement around an enum 115 . What are variable arguments or varargs 116 . What are asserts used for 117 . When should asserts be used 118 . What is garbage collection 119 . Can you explain garbage collection with an example 120 . When is garbage collection run 121 . What are best practices on garbage collection 122 . What are initialization blocks 123 . What is a static initializer 124 . What is an instance initializer block 125 . What is tokenizing 126 . Can you give an example of tokenizing 127 . What is serialization 128 . How do you serialize an object using serializable interface 129 . How do you de-serialize in Java 130 . What do you do if only parts of the object have to be serialized 131 . How do you serialize a hierarchy of objects 132 . Are the constructors in an object invoked when it is de-serialized 133 . Are the values of static variables stored when an object is serialized Collections 134 . Why do we need collections in Java 135 . What are the important interfaces in the collection hierarchy 136 . What are the important methods that are declared in the collection interface 137 . Can you explain briefly about the List interface 138 . Explain about ArrayList with an example 139 . Can an ArrayList have duplicate elements 140 . How do you iterate around an ArrayList using iterator 141 . How do you sort an ArrayList 142 . How do you sort elements in an ArrayList using comparable interface 143 . How do you sort elements in an ArrayList using comparator interface 144 . What is vector class How is it different from an ArrayList 145 . What is linkedList What interfaces does it implement How is it different from an ArrayList 146 . Can you briefly explain about the Set interface 147 . What are the important interfaces related to the Set interface 148 . What is the difference between Set and sortedSet interfaces 149 . Can you give examples

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