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Java Midterm- Lepsky

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QuestionAnswer
True or False: All program variables must be declared before you use them. True
True or False: Java is an extension of C++. False
True or False: Identifiers in Java are case sensitive. True
True or False: You can run Java programs and applets on any computer, no matter what the OS, as long as it's equipped with the Java Virtual Machine. True
True or False: JVM is a Java compiler translating a Java program into a machine language for a particular computer. False
True or False: Java uses call-by-value parameter passing mechanism for all arguments of methods. False
When was Java invented? 1990s
What happens when an expression uses == to compare two string variables? The value of the expression will be true if both string variables refer to the same object.
How is Java program translated into machine language? Via compiler and interpreter
List 2 advantages of Java over C++. Portability, object-oriented programming, garbage collector, no memory management using pointers
List all the primitive types in Java. byte, short, int, long, float, double, char, boolean
Which command checks if two Strings have the same contents? String s1, s2 = "hi"; if (s1.equals(s2)){}
What are the 4 different loop statements in Java? while, do-while, for, for each
Declare and create a new object my_species of the class Species. Species my_species = new Species();
Why do we declare instance variables private instead of public? To prohibit modification of instance variables of the class from other classes.
Created by: TitaniumShovel
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