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Interview Questions

Java

  1. What is JAVA?
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  2. What are the features of JAVA?
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  3. Name the Java IDE’s?
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  4. What do you mean by Constructor?
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  5. What is a Class?
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  6. What is an Object?
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  7. What is Inheritance?
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  8. What is Encapsulation?
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  9. What is Polymorphism?
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  10. What is meant by Method Overriding?
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  11. What is meant by Overloading?
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  12. What is meant by Interface?
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  13. What is meant by Abstract class?
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  14. Difference between Array and Array List.
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  15. Difference between String, String Builder, and String Buffer.
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  16. Explain about Public and Private access specifiers.
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  17. Difference between Default and Prohttps://github.com/SyntaxError-JARS/assignments/blob/main/project-2.md
  18. Difference between Abstract class and Interface.
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  19. What is the meaning of Collections in Java?
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  20. What are all the Classes and Interfaces that are available in the collections?
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  21. What is meant by Ordered and Sorted in collections?
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  22. Explain the different lists available in the collection.
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  23. Explain about Set and their types in a collection
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  24. Explain about Map and its types.
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  25. What is meant by Exception?
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  26. What are the types of Exceptions?
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  27. What are the different ways to handle exceptions?
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  28. What are the advantages of Exception handling?
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  29. What are the Exception handling keywords in Java
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  30. Explain about Exception Propagation.
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  31. What is the final keyword in Java?
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  32. What is a Thread?
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  33. What is Multi-threading?
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  34. What is Synchronization?
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  35. What is meant by Serialization?
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  36. What is meant by the Local variable and the Instance variable?
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  37. What is Abstraction?
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  38. What is the the Difference between an Error and Exception?
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SQL

  1. What is a database?
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  2. What is DBMS?
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  3. What is RDBMS?
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  4. What is SQL?
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  5. What is DML?
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  6. What is DDL?
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  7. What is DQL?
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  8. What is TCL?
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  9. What is a query?
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  10. What are the properties of transactions?
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  11. What is a key?
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  12. What is a primary key?
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  13. What is a foreign key?
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  14. What is multiplicity?
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  15. What is referential integrity?
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  16. What is a cascade delete?
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  17. What is Like keyword?
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  18. What is GROUP BY?
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  19. What is ORDER BY?
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  20. What is the WHERE clause?
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  21. What is the HAVING clause?
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  22. What is an agregate function?
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  23. What is a scalar function?
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  24. What are constraints?
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  25. How are joins different to set opeartions?
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  26. What is normalisation & it's forms?
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  27. How do you add a record to a table?
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  28. How do you add column to a table
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  29. How would you use IN and EXIST?
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  30. DROP?
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  31. DELETE?
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  32. TRUNCATE?
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  33. How to prevent SQL injections?
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  34. CRUD operations
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  35. What is ACID?
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  36. What is a Schema?
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  37. What do you need to establish a connection tohttps://github.com/SyntaxError-JARS/assignments/blob/main/project-2.md
  38. Explain importance of Hibernate F/w
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  39. JPA Vs Hibernate
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  40. JDBC vs hibernate
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  41. Explain Builder design pattern in hibernate
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  42. Explain Factory design pattern in hibernate
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  43. What are the Fetch strategies in hibernate?
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  44. load vs get
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  45. save vs persist
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  46. save vs saveorup
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  47. HQL vs SQL
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  48. What are the core interfaces in Hibernate?
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  49. Different states of an object in hibernate?
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  50. what is n+1 problem with hibernate?
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  51. Contextual sessions in hibernate?
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  52. L1 Vs L2 cache
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  53. Different inheritance mapping in hibernate?
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  54. How does Hiberanate manage dirty checking?
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  55. Different ways of doing association mapping in hibernate
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  56. What is ORM?
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  57. What is OGM? OGM vs ORM?
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  58. What is hbm2ddl auto? What options can we specify?
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  59. What is hibernate.cfg.xml?
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  60. Give annotations used in hibernate?
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  61. What is dialect in Hibernate?
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  62. Explain need of Criteria and Restrictions API in hibernate.
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Spring

  1. What is Spring?
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  2. What are some features of Spring?
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  3. Modules of Spring
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  4. What is the Bean Configuration File?
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  5. What is the root tag of the Beans.xml file? How would you add a bean in the file?
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  6. What are the 2 distinct types of containers that Spring provides?
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  7. What is Spring Bean?
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  8. What are the five scopes that a Spring Bean can have?
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  9. What is the default scope of a Spring bean if a scope is not definied?
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  10. What is the life cycle of a Spring Bean
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  11. What is an IoC?
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  12. what are the different IOC conatiners available in Spring? Differentiate between them.
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  13. What is dependency injection?
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  14. What are the different types of dependency injection, and which does Spring support?
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  15. When would you use the different types of injection?
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  16. What is autowiring?
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  17. What are the different autowiring modes that you can specify?
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  18. What are Spring annotations?
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  19. How do you register a class to a spring bean, using annotations?
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  20. How do you activate annotation-based autowiring in Spring?
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  21. What is the @Inject annotation?
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  22. What is @Bean?
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  23. How can you inject any collection as a bean property?
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  24. What are cross-cutting concerns?
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  25. What is code tangling and code scattering?
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  26. What is AOP?
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  27. What is an Aspect?
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  28. What do you mean by Advice?
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  29. What are the types of Advice?
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  30. What is a join point in Spring AOP?
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  31. What is a Pointcut in regards to Spring AOP?
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  32. What is the difference between joinpoint and pointcut?
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  33. What is AspectJ?
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  34. What is Spring ORM?
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  35. What 3 beans do you need to set up Hibernate with Spring ORM? Why are they necessary?
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  36. What does @Transactional do in Spring ORM?
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  37. Explain different annotations used in Spring AOP
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  38. What is Spring MVC?
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  39. Design pattern used in Spring MVC architecture?
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  40. Describe how Spring MVC implements the Model-View-Controller design pattern.
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  41. What do you need to do in order to configure the dispatcher servleet manually for Spring MVC?
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  42. How do you turn ON annotations support in Spring MVC?
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  43. Howw do you tell Spring that a class is a controller?
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  44. What does the @RequestMapping annotations do and what attributes can you define for it?
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  45. What are other annotations that can be used inside of a controller?
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  46. What is the ContextLoadListener in SpringMVC?
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  47. What is the @RestController annotation?
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  48. @Controller Vs @RestController
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  49. What is Spring Boot?
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  50. What does the parent tag in your POM for spring boot to work and what does it do for us?
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  51. What are some of the advantages of using Spring Boot over the basic Spring core?
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  52. What is the @SpringBootApplication?
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  53. Is it possible to add any confiugration to Spring Boot?
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  54. What type of information do we commonly add to the application.properties file?
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  55. What is Spring Data?
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  56. Advantages of Spring Data?
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  57. What interface can you extend through your repository interfaces to provide standard CRUD operations?
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  58. MVC1 Vs MVC2
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  59. Different ways of getting data in the spring controller
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  60. Explain the flow of Spring web MVC
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  61. Explain Spring boot starter project
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  62. What is actuator?
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  63. Spring Boot Vs Spring
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  64. Explain all stereo type annotations
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  65. How would you handle exceptons in Spring Web MVC?
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HTML/CSS

  1. What is HTML?
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  2. What is required to create an HTML document
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  3. What is a HTML tag?
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  4. What is an attribute?
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  5. How do you write a comment in HTML?
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  6. How would you insert an image into an HTML page?
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  7. How would you make a table in an HTML page?
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  8. What are three types of list tags you can use on an HTML document?
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  9. How would you set a background for an element?
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  10. What is the input tag used for?
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  11. What are some different values that you can assign to the 's type attribute and what data can you collect?
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  12. What are three different ways that you can add styles to an HTML document
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  13. What is CSS?
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  14. What CSS selectors you can use to access all HTML elements of a certain type, id, or class?
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  15. What are three ways to specify color properties?
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  16. What is specificity in CSS?
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  17. What is the box model in CSS?
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  18. How could you use a selector to choose a specific element with a specific class?
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  19. What is bootstrap?
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JavaScript

  1. What is the DOM?
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  2. What are some advantages that can be gained through using JavaScript
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  3. What does it mean that JavaScript is loosely typed?
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  4. What are global variables? How are these variable declared and what are the problems associated with using them?
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  5. What are undeclared and undefined variables?
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  6. What is === operator?
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  7. What is the typeof operator?
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  8. What is hoisting in JavaScript?
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  9. What are anonymous functions?
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  10. How can you add new elements dynamically?
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  11. What is an event?
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  12. What are some common JavaScript events?
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  13. What are event listeners? Name three ways that you can implement event listeners.
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  14. What is JSON in Ajax?
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  15. What is Ajax?
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  16. What are the advantages of Ajax?
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  17. What are the disadvantages of Ajax?
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  18. What is the for-in loop in JavaScript?
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  19. What is the for-of loop in JavaScript?
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  20. Java Vs javascript
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  21. JS Objects Vs Arrays
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DevOps & Agile

  1. Explain Agile
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  2. 12 Agile software development principles
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  3. Scrum Vs Agile
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  4. Scrum Vs Kanban
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  5. What is SDLC
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  6. Waterfall Vs Agile
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  7. Burn down chart
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  8. Scrum Board
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  9. StandUps
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  10. Role of scrum master
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  11. What is a Sprint?
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  12. Define Devops
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  13. How is DevOps related to Agile?
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  14. explain CI
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  15. explain Continuos Deployment and Continuous Delivery
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  16. explain about jenkins tool
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  17. explain the CI/CD process
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  18. what is continuous testing
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  19. devlopment vs production
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  20. Explain Maven as build automation tool
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  21. explain pom
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  22. jar vs war vs ear
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  23. Explain Maven build life cycle
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  24. how maven project is different than any other normal java project
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  25. local vs remote maven repositry
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  26. what are user stories
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  27. What is git feature branching?
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Cloud

  1. What are the advantages of Cloud Computing?
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  2. Describe the different cloud service models?
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  3. What are some of the popularly used cloud computing services?
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  4. Can we combine the cloud with on-premise data centers?
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  5. What is a virtual machine? How does it differ from something like Docker?
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  6. What are some of the cloud computing platforms available to us? What's their differences?
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  7. What is Continuous Integration?
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  8. What is Continuous Delivery?
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  9. What is Contiuous Deployment?
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  10. What is Azure App Service? What can we use it for?
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  11. What is Azure SQL? How does it differ from other SQL services?
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  12. What is Docker?
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  13. What is a container vs a virtual machine?
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React

  1. Differentiate between Real DOM and Virtual DOM.
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  2. What is React?
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  3. What are the features of React?
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  4. List some of the major advantages of React.
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  5. What are the limitations of React?
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  6. What is JSX?
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  7. What do you understand by Virtual DOM? Explain its working.
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  8. Why can’t browsers read JSX?
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  9. How different is React’s ES6 syntax when compared to ES5?
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  10. How is React different from Angular?
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  11. “In React, everything is a component.” Explain.
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  12. What must every react component return?
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  13. What is a React.Fragment and why is it useful?
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  14. Differentiate between states and props.
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  15. Differentiate between stateful and stateless components.
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  16. Explain Flux.
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  17. What is Redux?
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  18. How are Actions defined in Redux?
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  19. What is the significance of Store in Redux?
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  20. Why do we need a Router in React?
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  21. What is HOC in React?
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