Java Programming Competition I
.
- 1.What is the range of an int data type in Java?
- A.
–2^15 to 2^15 – 1
- B.
0 to 2^15
- C.
–2^31 to 2^31 – 1
- D.
0 to 2^31
- 2.What is the meaning of variable++ ?
- A.
Add one to the variable.
- B.
Add one to the variable after its current value has been used.
- C.
Add one to the variable before using its value.
- D.
Double the value in the variable.
- 3.Consider the following line of Java code. int x = 1+7*2; What will be the value of x at the end of execution of the line of code?
- A.
9
- B.
15
- C.
16
- D.
21
- 4.The Java expression: !((b != 0) || (c <= 5)) is equivalent to:
- A.
(!(b = 0)) && (!(c>5))
- B.
(b==0) && (c >5)
- C.
(b!=0) && (c
- D.
!((b 0) && (c
- 5.What does the following program output to the monitor: int value = 0, count = 1; value = count++ ; System.out.println("value: "+ value + “count: " + count );
- A.
Value: 0 count: 0
- B.
Value: 0 count: 1
- C.
Value: 1 count: 1
- D.
Value: 1 count: 2
- 6.What is the output of the following: int a = 0, b = 10; a = --b ; System.out.println("a= " + a + " b= " + b );
- A.
A= 9 b=11
- B.
A= 10 b= 9
- C.
A= 9 b=9
- D.
A= 0 b=9
- 7.Which of the answers does the same thing as the following: value += sum++ ;
- A.
Value = value + sum; sum = sum + 1;
- B.
Sum = sum + 1; value = value + sum;
- C.
Value = value + sum;
- D.
Value = value + ++sum;
- 8.What is the name for an application that changes a human-readable programming language into a machine-readable language?
- A.
Compiler
- B.
Converter
- C.
Encoder
- D.
Interpreter
- 9.What kind of programming language is Java?
- A.
An object-oriented programming language
- B.
An array programming language
- C.
A logic programming language
- D.
A database programming language
- 10.What is the result of evaluating the following expression? (1/2 + 3.5) * 2.0
- A.
8
- B.
7.0
- C.
6.0
- D.
None of the above
- 11.The && operator works with which data types?
- A.
Int
- B.
Long
- C.
Double
- D.
Boolean
- 12.Which one of the following is NOT a correct variable name?
- A.
2bad
- B.
Zero
- C.
TheLastValueButOne
- D.
Year2000
- 13.Does every Java variable use a data type?
- A.
No---only numeric variables use data types.
- B.
No---data types are optional.
- C.
Yes---all variables are of the same data type.
- D.
Yes---each variable must be declared along with its data type.
- 14.When you compile a Java program, what are you doing?
- A.
Saving it to disk
- B.
Converting it into a form the computer can better understand
- C.
Adding it to your program collection
- D.
Converting it to object file
- 15.What is a variable?
- A.
Something that wobbles but doesn't fall down.
- B.
Text in a program that the compiler ignores.
- C.
A place to store information in a program.
- D.
An expression use in Java programming.
- 16.What is the process of fixing errors called?
- A.
Defrosting
- B.
Debugging
- C.
Decomposing
- D.
Compiling
- 17.What do you call a group of statements contained with an opening bracket and a closing bracket?
- A.
A block statement
- B.
Groupware
- C.
Bracketed statements
- D.
Not in the list provided
- 18.What is the output of the following program fragment? for ( int j = 0; j < 5; j++ ) { System.out.print( j + " " ); } System.out.println( );
- A.
0 1 2 3 4 5
- B.
0 1 2 3 4
- C.
0 1 2 3 4 5
- D.
J j j j j
- 19.What is the output of the following code fragment? for ( int j = 10; j > 5; j-- ) { System.out.print( j + " " ); } System.out.println( );
- A.
10 11 12 13 14 15
- B.
9 8 7 6 5 4 3 2 1 0
- C.
10 9 8 7 6 5
- D.
10 9 8 7 6
- 20.What must the test be so that the following fragment prints out the integers from 5 through 15? for ( int j = 5; ________ ; j++ ){ System.out.print( j + " " ); }System.out.println( );
- A.
J
- B.
J
- C.
j
- D.
J==15
- 21.What must the change be so that the following fragment prints out the even integers 0 2 4 6 8 10? for ( int j = 0; j <= 10; _______ ) System.out.print( j + " " ); System.out.println( );
- A.
J+2
- B.
J = j+2
- C.
J++++
- D.
++j++
- 22.What must the initialization be so that the following fragment prints out the integers -3 -2 -1 ? for ( _______; j < 0; j++ ) System.out.print( j + " " ); System.out.println( );
- A.
int j = 0
- B.
Int j < 0
- C.
Int j = -3
- D.
int j = -4
- 23.What is the output of the following code fragment? for ( int j = 5; j > -5; j-- ) System.out.print( j + " " ); System.out.println( );
- A.
-5 -4 -3 -2 -1 0
- B.
5 4 3 2 1 0
- C.
5 4 3 2 1 0 -1 -2 -3 -4 -5
- D.
5 4 3 2 1 0 -1 -2 -3 -4
- 24.What is the output of the following code fragment? int count = 0; for ( ; count < 9; ++count ) System.out.print( count + " " );
- A.
0 1 2 3 4 5 6 7 8
- B.
Nothing --- the program will not compile.
- C.
0 1 2 3 4 5 6 7
- D.
1 2 3 4 5 6 7 8 9
- 25.What does this code print on the monitor? int count = 7; while ( count >= 4 ) { System.out.print( count + " " ); count = count - 1; } System.out.println( );
- A.
1 2 3 4 5 6 7
- B.
7 6 5 4
- C.
6 5 4 3
- D.
7 6 5 4 3
Questions: 20 | Attempts: 7325 | Last updated: Mar 22, 2022
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