Deck 2: Introduction to Java Applications

Question 1

Which of the following escape sequences represents a carriage return?

A)\n.
B)\r.
C)\cr.
D)\c.

Answer 1

B

Question 2

Which is the output of the following statements? System.out.print( "Hello ");
System.out.println( "World" );

A)Hello World
B)HelloWorld
C)Hello World
D)World Hello

Answer 2

A

Question 3

Which command executes the Java class file Welcome.class?

A)javac Welcome.class
B)java Welcome.class
C)java Welcome
D)run Welcome.class

Answer 3

C

Question 4

What is the value of result after the following Java statements execute? int a,b,c,d,result;
A = 4;
B = 12;
C = 37;
D = 51;
Result = d % a * c + a % b + a;

A)119
B)51
C)127
D)59

Question 5

All import declarations must be placed

A)inside the class declaration's body.
B)before the class declaration.
C)after the class declaration.
D)all of the above will work.

Question 6

Which command compiles the Java source code file Welcome.java?

A)cd Welcome.java
B)javac Welcome.java
C)java Welcome.java
D)compile Welcome.java

Question 7

________ enables a program to read data from the user.

A)printf.
B)import declaration.
C)Scanner.
D)main.

Question 8

Which of the following is the escape character?

A)*
B)\
C)\n
D)"

Question 9

Which of the following statements would display the phase Java is fun?

A)System.out.println( "hellois fun\rJava " );
B)System.out.println( 'Java is fun' );
C)System.out.println( "\"Java is fun\"" );
D)System.out.println( Java is fun );

Question 10

Which of the following is not a Java primitive type?

A)char
B)byte
C)real
D)double

Question 11

Which of the following does not contain a syntax error?

A)System.out.println( 'Hello world!' ):
B)System.out.println( "Hello world!" );
C)System.out.println( "Hello world!" );
D)System.out.println( Hello world! );

Question 12

Which of the following is not a valid Java identifier?

A)my Value
B)$_AAA1
C)width
D)m_x

Question 13

Which of the following statement displays Hello World?

A)System.out.printf( "%2s","Hello " "World" );
B)System.out.printf( "%s %s","Hello","World" );
C)System.out.printf( "%s%s","Hello,World" );
D)System.out.printf( "s% s%","Hello","World" );

Question 14

Which of the following statements does not alter a memory location?

A)int a;
B)number = 12;
C)y = y + 2;
D)width = Integer.parseInt(input);

Question 15

Which of the following statements will print a single line containing "hello there"?

A)System.out.println( "hello" ); System.out.println( " there" );
B)System.out.println( "hello" ," there" );
C)System.out.println( "hello" ); System.out.print( " there" );
D)System.out.print( "hello" ); System.out.println( " there" );

Question 16

When method printf requires multiple arguments,the arguments are separated with ________.

A)colons (:).
B)semicolons (;).
C)commas (,).
D)periods (. ).

Question 17

The format specifier ________ is a placeholder for an int value?

A)%a
B)%d
C)%int
D)%s

Question 18

Which of the following cannot cause a syntax error to be reported by the Java compiler?

A)Mismatched {}
B)Missing */ in a comment that begins with /*
C)Missing ;
D)An extra blank line.

Question 19

Which of the following is not an arithmetic operator?

A)+
B)-
C).
D)%

Question 20

Which of the following is a variable declaration statement?

A)int total;
B)import java.util.Scanner;
C)public static void main( String args[] )
D)// first string entered by user

Question 21

Which of the following is not a compilation error?

A)Neglecting to initialize a local variable in a method before it is used.
B)Placing a semicolon at the end of the first line of an if statement.
C)Omitting the left and right parenthesis for the condition of an if statement.
D)All are compilation errors.

Question 22

What will be output after the following Java statements have been executed? int a,b,c,d;
A = 4;
B = 12;
C = 37;
D = 51;
If ( a < b )
System.out.println( "a < b" );
If ( a > b )
System.out.println( "a > b" );
If ( d <= c )
System.out.println( "d <= c" );
If ( c != d )
System.out.println( "c != d" );

A)a < b c != d
B)a < b d <= c
C != d
C)a > b c != d
D)a < b c < d
A != b

Question 23

Each of the following is a relational or equality operator except:

A)<=
B)=!
C)==
D)>