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Java persistence layer interview questions

What is an ORM? Is SessionFactory in Hibernate thread-safe? Is Session thread-safe (can two threads share the same Session)? Describes the process of loading entity objects in Session. What is the difference between using # and $ to write placeholders in MyBatis?

Dec 10, 2019 pm 02:41 PM

Java

Java framework interview questions (2)

Spring is undoubtedly the most popular framework in Java and is widely used. Almost every company interview will involve spring and database. You can be unfamiliar with Struts, but you must not show that you don't know spring.

Dec 09, 2019 pm 02:51 PM

java

Java framework interview questions (1)

Talk about your understanding of Struts. Talk about your understanding of Hibernate. Talk about your understanding of Spring. Let’s talk about the advantages and disadvantages of Struts. What is the difference between iBatis and Hibernate? Let’s introduce Hibernate’s second-level cache. What is JDO?

Dec 07, 2019 pm 03:03 PM

java

javaweb interview questions (2)

What are the basic steps for JDBC to access a database? Let’s talk about the difference between preparedStatement and Statement. Let’s talk about the concept of transactions and the steps of processing transactions in JDBC programming. The principle of database connection pool, why should we use connection pool? What is JDBC dirty reading?

Dec 06, 2019 pm 03:02 PM

java

JavaWeb interview questions (1)

Let’s talk about the life cycle of Servlet? What is the difference between forward() and redirect() in Servlet API? What is the difference between request.getAttribute() and request.getParameter()? What are the built-in objects of jsp?

Dec 05, 2019 pm 03:08 PM

Java

Basic Java interview questions (4)

What is a.hashCode() used for? What does it have to do with a.equals(b)? The difference between byte stream and character stream. What is java serialization and how to implement java serialization? Or please explain the role of Serializable interface. Describe the principle mechanism of JVM loading class files?

Dec 04, 2019 pm 03:04 PM

Java

Basic Java interview questions (3)

String s = new String("xyz");How many StringObjects are created? Can the String class be inherited? The difference between String and StringBuffer. The difference between final, finally and finalize.

Dec 03, 2019 pm 03:14 PM

Java

java collection interview questions

The difference between ArrayList and Vector. The difference between HashMap and Hashtable. What is the difference between List and Map? Do List, Set, and Map inherit from the Collection interface? What are the characteristics of each of the three interfaces List, Map, and Set when accessing elements?

Dec 02, 2019 pm 04:27 PM

java

Basic Java interview questions (2)

Is it possible to issue a call to a non-static method from within a static method? The difference between Integer and int. What is Math.round(11.5) equal to? What is Math.round(-11.5) equal to? What is the difference between Overload and Override?

Nov 30, 2019 pm 03:28 PM

Java

Basic Java interview questions (1)

Can a ".java" source file include multiple classes (not inner classes)? What are the restrictions? Does Java have goto? Let’s talk about the difference between & and &&. How to break out of the current multiple nested loops in JAVA? Can the switch statement operate on byte, long, or String?

Nov 30, 2019 pm 01:25 PM

Java

Differences between java collections interview questions

What is the difference between HashMap and Hashtable? What is the difference between array (Array) and list (ArrayList)? When should you use Array instead of ArrayList? What is the difference between ArrayList and LinkedList?

Nov 29, 2019 pm 03:49 PM

java

Compilation of common Java interview questions

What are the characteristics of object-oriented? What is the difference between member variables and local variables? What is the difference between static variables and member variables? What are the differences and applications of this and super? What are the methods of sorting? Please list. The difference between String, StringBuffer and StringBuilder.

Nov 29, 2019 pm 01:55 PM

java

Java internal classes and reflection interview questions

What is the difference between Static Nested Class and Inner Class? Note: The creation of non-static inner class objects in Java depends on its outer class objects. Reflection in ava is first able to obtain the bytecode of the class to be reflected in Java.

Nov 28, 2019 pm 03:43 PM

Java

Java intern interview questions (with answers)

What are the Java container frameworks? What are the differences between list, map, set, and array? What is the difference between collection and collections? What is the difference between string, stringbuilder, and stringbuffer? What is the difference between == and equals?

Nov 28, 2019 pm 01:39 PM

java