CNIT 255 Exam 1
Which describes Java?
A) Object Oriented
B) Architecture-Neutral
C) Multithreaded
D) All of the above. - Answer-A
Which describes the origins of Java?
A) Java was invented in in 2000.
B) Java has always been used mostly at the server level, since it could not compete with better options
for dynamic content in the browser.
C) Java was considered reasonably safe and secure, running in a limited "sandbox."
D) Oracle, who invented Java, made sure Netscape, Internet Explorer, and the other major browsers at
the time had a unified version of Java built into them. - Answer-C
,How can you print the String "hello" in Java?
A) System.out.println("hello");
B) printf("hello");
C) "hello".print();
D) println("hello"): - Answer-A
Suppose you have a correctly written java file, "MyClass.java". When it is compiled, what new file will be
produced? - Answer-Myclass.class
What best describes the "String [] args" in a main() method?
A) It allows someone to pass arguments into your program when they run your code.
B) It explains to the compiler that your program is to be run from the command line instead of double
clicked from the desktop.
C) It defines a variable called String of type args.
D) It's not typed right and will cause a compile-time error. - Answer-A
Name as many floating number types in Java as you know: - Answer-Float and Double
,What keyword do you put in front of ints and doubles to make them constants? - Answer-Final
What will the value of x be after the following expression is evaluated?
int x = 14 % 10 + ;
A) 5.25
B) 2.65
C) 5
D) 2 - Answer-C
Which is true of the char data type? (list all that apply)
A) It is considered one of the four "integer" variable types
B) It represents a unicode character by mapping a numerical value to a glyph.
C) The maximum numerical value it can hold is 255.
D) char literal values are typed in java programs using double quotes (e.g. "A")
E) Some char literal values need a slash (\) in front of them. - Answer-B and E
What is returned by Math.pow(3,2)
, A) "bang!bang!bang! bang!bang!bang!"
B) 8
C) 9
D) 8.0
E) 9.0 - Answer-E
What is printed?
int x = 0;
x += x++;
System.out.println(x); - Answer-0
Which conversions are "automatic"? List all that apply:
A) int => double
B) double => int
C) char => int
D) long => int
Which describes Java?
A) Object Oriented
B) Architecture-Neutral
C) Multithreaded
D) All of the above. - Answer-A
Which describes the origins of Java?
A) Java was invented in in 2000.
B) Java has always been used mostly at the server level, since it could not compete with better options
for dynamic content in the browser.
C) Java was considered reasonably safe and secure, running in a limited "sandbox."
D) Oracle, who invented Java, made sure Netscape, Internet Explorer, and the other major browsers at
the time had a unified version of Java built into them. - Answer-C
,How can you print the String "hello" in Java?
A) System.out.println("hello");
B) printf("hello");
C) "hello".print();
D) println("hello"): - Answer-A
Suppose you have a correctly written java file, "MyClass.java". When it is compiled, what new file will be
produced? - Answer-Myclass.class
What best describes the "String [] args" in a main() method?
A) It allows someone to pass arguments into your program when they run your code.
B) It explains to the compiler that your program is to be run from the command line instead of double
clicked from the desktop.
C) It defines a variable called String of type args.
D) It's not typed right and will cause a compile-time error. - Answer-A
Name as many floating number types in Java as you know: - Answer-Float and Double
,What keyword do you put in front of ints and doubles to make them constants? - Answer-Final
What will the value of x be after the following expression is evaluated?
int x = 14 % 10 + ;
A) 5.25
B) 2.65
C) 5
D) 2 - Answer-C
Which is true of the char data type? (list all that apply)
A) It is considered one of the four "integer" variable types
B) It represents a unicode character by mapping a numerical value to a glyph.
C) The maximum numerical value it can hold is 255.
D) char literal values are typed in java programs using double quotes (e.g. "A")
E) Some char literal values need a slash (\) in front of them. - Answer-B and E
What is returned by Math.pow(3,2)
, A) "bang!bang!bang! bang!bang!bang!"
B) 8
C) 9
D) 8.0
E) 9.0 - Answer-E
What is printed?
int x = 0;
x += x++;
System.out.println(x); - Answer-0
Which conversions are "automatic"? List all that apply:
A) int => double
B) double => int
C) char => int
D) long => int
