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CSE 2221 Midterm 1 Exam|89 Questions with Accurate solutions
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CSE 2221 Midterm 1 Exam|89 Questions with Accurate solutions
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CSE 2221 Midterm 1 Exam|89 Questionswith Accurate solutions
JUnit - - industry-standard library for unit-testing software components
- Javadoc - - Industry-standard documentation utility for Java programs
- Java compiler - - checks the source code of
a program in a .java file; if and only if there are no compile-time errors, it
generates bytecode
for that program and saves it in a .class file
- javac - - A batch-style compiler. Part of the Java Development Kit (JDK)
- Bytecode - - instructions for the Java virtual machine
- Java Virtual Machine - - a virtual computer. Executes your program by
interpreting the bytecode that is loaded
- Significance of JVM - - Portability (write once, run anywhere), universality
(source code doesn't have to be in java), and performance
- public - - anyone can use the class
- final - - no one can incrementally change the class by using inheritance
- String literals - - A sequence of characters...
Character-string constants
- concatenated - - joined together to create new character strings using the
+ operator
- variable - - the name of a "location" that
"stores" a value of a particular type
- type - - the name of the set of all possible values that a variable might
have
- mathematical variable - - an arbitrary but fixed value
- program variable - - a particular value at any one time during program
execution, and that value (generally) may change at other times
- program type - - has a corresponding
, mathematical type that models it
- declare a program variable - - provide a name for a location to store its
value, and indicate its program type
- camel case - - the practice of entering the first word in an object's name in
lower-case and then capitalizing the first letter of each subsequent word in
the name (myLuckyNumber)
- declaring constant inside a method - - use camel case for variable name
(final double myLuckyNumber)
- declaring constant at class level - - use all upper case letters and separate
the words with '_'
- Monte Carlo - - Class of computational methods that use
random sampling to estimate results
- method header - - includes the method's return type, its name, and its
parameter list.
- method name/parameter types - - compromise the method signature
- method body - - the block of code that is executed when the method is
called.
- private - - limits the places from which this static method may be called:
only from within this class
- public - - allow method to be called from other classes, too.
- declared variable inside method - - called a local variable of the method
- int c = gcd(a,b) - - a and b are the arguments to the call of gcd (the ones
in the method are called formal parameters)
- scope of variables - - calling program where the variables are declared
- When you call a method, how are the
arguments connected to the formal
parameters? - - The argument values are copied into the formal
parameters to initialize them
- When the called method body returns, how
are results communicated back to the code
that called the method? - - Only the returned value is copied back to the
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