Viva Questions for Java Lab
What is Java?
Java is an object oriented programming language
Is Java invented for Internet?
No, it was developed for programming towards tiny devices
What is byte code?
It is machine understandable code and targeted for JVM (Java Virtual Machine). It is class file.
What is JVM?
Java Virtual Machine which accepts java byte code and produces result
What are java buzzwords?
Java buzzwords explain the important features of java. They are Simple,
Secured, Portable, architecture neutral, high performance, dynamic, robust, interpreted etc.
Is byte code is similar to .obj file in C?
Yes, both are machine understandable codes
No, .obj file directly understood by machine, byte code requires JVM
What is new feature in control statements comparing with C/C++?
Labeled break and labeled continue are new
What are new features in basic features comparing with C/C++?
Data types: All data types on all machines have fixed size;
Constants: final is used to declare constant
Boolean Type: boolean is new data type in Java which can store true/false
There are no structures/unions/pointers
Is String data type?
No, Strings are classes in Java (Arrays are classes)
What are length and length( ) in Java?
Both gives number of char/elements, length is variable defined in Array class, length( ) is method defined in String class
What is Java?
Java is an object oriented programming language
Is Java invented for Internet?
No, it was developed for programming towards tiny devices
What is byte code?
It is machine understandable code and targeted for JVM (Java Virtual Machine). It is class file.
What is JVM?
Java Virtual Machine which accepts java byte code and produces result
What are java buzzwords?
Java buzzwords explain the important features of java. They are Simple,
Secured, Portable, architecture neutral, high performance, dynamic, robust, interpreted etc.
Is byte code is similar to .obj file in C?
Yes, both are machine understandable codes
No, .obj file directly understood by machine, byte code requires JVM
What is new feature in control statements comparing with C/C++?
Labeled break and labeled continue are new
What are new features in basic features comparing with C/C++?
Data types: All data types on all machines have fixed size;
Constants: final is used to declare constant
Boolean Type: boolean is new data type in Java which can store true/false
There are no structures/unions/pointers
Is String data type?
No, Strings are classes in Java (Arrays are classes)
What are length and length( ) in Java?
Both gives number of char/elements, length is variable defined in Array class, length( ) is method defined in String class
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