Top 100+ Java Native Interface (jni) Interview Questions And Answers
Question 1. What Is Native Interface In Java?
JNI is the mechanism used to invoke strategies written in languages consisting of c and C++. You can write code the usage of language like c and c++ and claim its local strategies and may use the identical technique in java using JNI.
JNI exposes JNI capabilities and hints which can access java items and methods.
Question 2. Are There Jvm’s That Work As A True 64-bit Application?
IBM’s SDK for Windows on Itanium Solaris TM-SPARCTM platform edition of J2SDK 1.Four.Zero CACAO is 64 bit simply-in-time (JIT) compiler for Java.
Adv Java Interview Questions
Question three. Define Jni Functions And Pointers?
JNI functions are the ones that are utilized by the builders to interact with JVM inside a local method. Every JNI characteristic gets a special parameter as its first argument – JNIEnv ; which factors to a special JNI facts shape of the sort JNIEnv_ . One of the factors of JNI information shape is a ‘pointer to an array’ generated by using JVM, and every element of this array is once more a pointer to a JNI characteristic.
A JNI feature can be invoked from the local method with the aid of referencing these recommendations. Every JVM gives a completely unique implementation of the JNI features.
Question four. What Is Swt?
SWT is the software thing (a part of the Eclipse IDE Framework) that promises local widget capability for the Eclipse platform in an working.
Adv Java Tutorial
Question five. Explain The Advantages And Disadvantages Of Using Jni?
Advantages of JNI
Using JNI, we will access c and c++ code which provides performance improve to JAVA.
JNI allows JAVA to get right of entry to a few hardware features the usage of other languages like c and c++.
Disadvantages of JNI
JNI uses native languages which suggest it has portability issue.
Code debug is massive problem for the developers who use JNI features in JAVA.
J2EE Interview Questions
Question 6. What Is Jni?
JNI stands for Java Native Interface. It is an interface among Java, packages and libraries which can be written in different languages. JNI is purely used to engage with “local” code (code written in machine level language such as C). For instance, JNI permits the use of C libraries and C programs to be used in Java applications.
Question 7. What Is Jawin?
The Java/Win32 integration assignment is loose, open supply structure for interoperation between Java and additives exposed via Microsoft.
J2EE Tutorial Core Java Interview Questions
Question 8. Explain Exception Handling In Jni?
JNI exceptions are handled by using the use of the following:
Throw( ): Throws an existing exception object. Used in native techniques to rethrow an exception.
ThrowNew( ): Creates a brand new exception object and throws.
ExceptionOccurred( ): Determines the exception status of throws and not but cleared.
ExceptionDescribe( ): Displays the exception and stack hint
ExceptionClear( ): A pending exception is cleared.
FatalError( ): Causes a fatal errors to elevate and does now not go back.
Question nine. How Can I Create Standalone Java Applications That Can Be Launched Just Like Any Other Mac Os Application?
You can use JManager API or JBindery to accomplish that. Here’s an editorial that shows you a way to create a wrapper program round a Java utility:
JSP Interview Questions
Question 10. Is There A Tcl-java Bridge?
Yes, The Tcl/Java task presently has programs, Jacl and Tcl Blend. Jacl, which stands for Java Command Language, is a Java implementation of Tcl…
Core Java Tutorial
Question eleven. How Can I Access Java From Python (and The Other Way Around)? Are There Any Jni Wrappers Which Can Bridge The Gap Between The Two?
JPE (Java-Python Extension) is an open-supply attempt for seamless inter-operability among Java and Python. Java-Python Extension main website JPE.
Java-Springs Interview Questions
Question 12. Is There An Alternative To Jni On Macos?
If you need to call Mac OS C code out of your Java code, there are presently mechanisms for doing so: JDirect2 and the Java Native Interface (JNI).
Adv Java Interview Questions