Core Java - Interview Questions and Answers for 'Byte code' | Search Interview Question

Core Java - Interview Questions and Answers for 'Byte code' - 4 question(s) found - Order By Newest

Q1. What is Byte Code ? Why Java's intermediary Code is called Byte Code ?

Ans. Bytecode is a highly optimized set of instructions designed to be executed by the Java run-time system. Its called Byte Code because each instruction is of 1-2 bytes.

Sample instructions in Byte Code -

1: istore_1
2: iload_1
3: sipush 1000
6: if_icmpge 44
9: iconst_2
10: istore_2

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Q2. Difference between PATH and CLASSPATH ?

Operating System

Ans. PATH is the variable that holds the directories for the OS to look for executables. CLASSPATH is the variable that holds the directories for JVM to look for .class files ( Byte Code ).

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Q3. What is meant Java is "Write Once Run Anywhere" ?

Core Java

Ans. It means that Java is compiled to byte code that is platform independent and hence can be run anywhere or any machine.

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Q4. Does Java generate .class file for interfaces ?

Core Java

Ans. Yes

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