CSE 2221 Final UPDATED Exam Questions
and CORRECT Answers
Java language - CORRECT ANSWER - widely used, object-oriented, run through Java
Virtual Machine
compiler - CORRECT ANSWER - 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
Java Virtual Machine - CORRECT ANSWER - a ubiquitous virtual computer, launcher of
JVM loads the JVM and your program's .class files, JVM executes program by interpreting
bytecode that was loaded
Java end-to-end - CORRECT ANSWER - .java (source code) --> .class (bytecode) -->
JVM
block - CORRECT ANSWER - section of code between { and }
statement - CORRECT ANSWER - symbols in Java grammar, ending with ;
class - CORRECT ANSWER - declares the code to be a software component for which
bytecode should be generated by the compiler
main method header - CORRECT ANSWER - public static void main(String[] args)
declare - CORRECT ANSWER - provide a name for a location to store the variable's value
and indicate its program type
literal - CORRECT ANSWER - a data value appearing in a program
,method signature - CORRECT ANSWER - includes return type, name, and parameter list
method body - CORRECT ANSWER - the block of code that is executed when the method
is called
private - CORRECT ANSWER - can be called only within this class
public - CORRECT ANSWER - can be called from other classes
formal parameters - CORRECT ANSWER - stated in the method signature
arguments - CORRECT ANSWER - the actual values passed to the method
when a method is called - CORRECT ANSWER - argument values are copied to formal
parameters, control is transferred to the beginning of the method body
parameter-passing mechanism of Java - CORRECT ANSWER - may be termed "call-by-
copying" because argument values are COPIED into formal parameters, may be termed "call-by-
value" because argument VALUES are copied into formal parameters
find sqrt(x) - CORRECT ANSWER - Let r be my first guess for sqrt(x)
Let 1/2(x/r+r) be my next guess
Continue halving the interval, squaring your current guess to see how close it is to x
array - CORRECT ANSWER - a group of similar variables, all of the same type, and with
systematically related names that involve special syntax
(a reference type, the name of this group is a reference to the entire collection of element
variables)
, element - CORRECT ANSWER - one value in an array, acts like a single variable
declaring an array - CORRECT ANSWER - int[] a;
declaring and creating an array - CORRECT ANSWER - int[] a = new int[4];
declaring and initializing an array - CORRECT ANSWER - int[] a = {6, 18, 9, -10};
static method - CORRECT ANSWER - has zero or more formal parameters of various
types, returns a value of a particular return type to the calling program (or nothing if it's void)
system - CORRECT ANSWER - any part of anything that you want to think about as an
indivisible unit
interface - CORRECT ANSWER - a description of the "boundary" between a system and
everything else, that also describes how to think of that system as a unit
subsystem - CORRECT ANSWER - (component), a system that is used inside (i.e. as a
part of) another system
client - CORRECT ANSWER - a person (or a role played by some agent) viewing the
system from the outside as an indivisible unit
implementer - CORRECT ANSWER - a person (or a role played by some agent) viewing
the system "from the inside" as an assembly of subsystems/components
information hiding - CORRECT ANSWER - a technique for describing system behavior in
which you intentionally leave out "internal implementation details" of the system
and CORRECT Answers
Java language - CORRECT ANSWER - widely used, object-oriented, run through Java
Virtual Machine
compiler - CORRECT ANSWER - 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
Java Virtual Machine - CORRECT ANSWER - a ubiquitous virtual computer, launcher of
JVM loads the JVM and your program's .class files, JVM executes program by interpreting
bytecode that was loaded
Java end-to-end - CORRECT ANSWER - .java (source code) --> .class (bytecode) -->
JVM
block - CORRECT ANSWER - section of code between { and }
statement - CORRECT ANSWER - symbols in Java grammar, ending with ;
class - CORRECT ANSWER - declares the code to be a software component for which
bytecode should be generated by the compiler
main method header - CORRECT ANSWER - public static void main(String[] args)
declare - CORRECT ANSWER - provide a name for a location to store the variable's value
and indicate its program type
literal - CORRECT ANSWER - a data value appearing in a program
,method signature - CORRECT ANSWER - includes return type, name, and parameter list
method body - CORRECT ANSWER - the block of code that is executed when the method
is called
private - CORRECT ANSWER - can be called only within this class
public - CORRECT ANSWER - can be called from other classes
formal parameters - CORRECT ANSWER - stated in the method signature
arguments - CORRECT ANSWER - the actual values passed to the method
when a method is called - CORRECT ANSWER - argument values are copied to formal
parameters, control is transferred to the beginning of the method body
parameter-passing mechanism of Java - CORRECT ANSWER - may be termed "call-by-
copying" because argument values are COPIED into formal parameters, may be termed "call-by-
value" because argument VALUES are copied into formal parameters
find sqrt(x) - CORRECT ANSWER - Let r be my first guess for sqrt(x)
Let 1/2(x/r+r) be my next guess
Continue halving the interval, squaring your current guess to see how close it is to x
array - CORRECT ANSWER - a group of similar variables, all of the same type, and with
systematically related names that involve special syntax
(a reference type, the name of this group is a reference to the entire collection of element
variables)
, element - CORRECT ANSWER - one value in an array, acts like a single variable
declaring an array - CORRECT ANSWER - int[] a;
declaring and creating an array - CORRECT ANSWER - int[] a = new int[4];
declaring and initializing an array - CORRECT ANSWER - int[] a = {6, 18, 9, -10};
static method - CORRECT ANSWER - has zero or more formal parameters of various
types, returns a value of a particular return type to the calling program (or nothing if it's void)
system - CORRECT ANSWER - any part of anything that you want to think about as an
indivisible unit
interface - CORRECT ANSWER - a description of the "boundary" between a system and
everything else, that also describes how to think of that system as a unit
subsystem - CORRECT ANSWER - (component), a system that is used inside (i.e. as a
part of) another system
client - CORRECT ANSWER - a person (or a role played by some agent) viewing the
system from the outside as an indivisible unit
implementer - CORRECT ANSWER - a person (or a role played by some agent) viewing
the system "from the inside" as an assembly of subsystems/components
information hiding - CORRECT ANSWER - a technique for describing system behavior in
which you intentionally leave out "internal implementation details" of the system
