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| Interview Questions and Answers for 'Vitech systems' - 3 question(s) found - Order By Newest | ||||
 Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews. | ||||
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| Ans. Abstract classes can have both abstract methods ( method declarations ) as well as concrete methods ( inherited to the derived classes ) whereas Interfaces can only have abstract methods ( method declarations ). A class can extend single abstract class whereas it can implement multiple interfaces. | ||||
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 Discuss Correct / Improve  java classes abstract class interfaces abstract class vs interface abstract classes vs interfaces  Asked in 82 Companies  basic  frequent | ||||
 Related Questions | ||||
 What are the different uses of Interfaces in Java ? | ||||
| Why can't we have diamond problem with interfaces ? | ||||
| Why do we need Thread class even in case we execute thread using runnable interface ? | ||||
| What is the difference between List, Set and Map ? or What are the different Java Collections Interfaces ? | ||||
| What are Marker Interfaces ? Name few Java marker interfaces ? | ||||
| Can we declare interface methods as private ? | ||||
| What is comparator interface used for ? | ||||
| What is the use of runnable interface if we can always create a new thread using Thread class ? | ||||
| Which of the following doesn't extend Collection interface ? | ||||
| Very frequently asked.Usually among first few questions. | ||||
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| Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application 1. Controller receives the requests and handles overall control of the request 2. Model holds majority of the Business logic, and 3. View comprise of the view objects and GUI component | ||||
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| Discuss Correct / Improve j2ee mvc mvc design pattern design pattern struts spring web application web frameworks ebay Asked in 60 Companies basic frequent | ||||
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| Related Questions | ||||
| Explain Flow of Spring MVC ? | ||||
| What are the benefits of using Spring Framework ? | ||||
| Why Struts 1 Classes are not Thread Safe whereas Struts 2 classes are thread safe ? | ||||
| What bean scopes does Spring support? Explain them. | ||||
| Which MVC is struts2 based on ? | ||||
| What are different modules of spring ? | ||||
| What is Spring configuration file? | ||||
| Q: What is default scope of bean in Spring framework? | ||||
| What is bean auto wiring? | ||||
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| Ans. class Student { /// /// /// private int id; private String name; /// /// /// public Student(int id, String name) { this.name = name; this.id = id; }// Student /// /// /// public int getId() { return id; }// getId /// /// /// public void setId(int id) { this.id = id; }// setId /// /// /// public String getName() { return name; }// getName /// /// /// public void setName(String name) { this.name = name; }// setName @Override public boolean equals(Object obj) { if (obj == null) return false; if (!(obj instanceof Student)) return false; if (obj == this) return true; return this.getId() == ((Student) obj).getId(); }// equals /// /// /// @Override public int hashCode() { return this.getId(); }// hashCode }// Student | ||||
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| Discuss Correct / Improve Asked in 1 Companies | ||||
| Related Questions | ||||
| Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object? | ||||
| How many threads can access a concurrent hashmap when the hashcode is overridden and always returns a zero. | ||||
