Question 1

Which of the following statements is false?

Accepted Answer

A)  Primitive types are keywords. 
B)  Primitive types must appear in all lowercase letters. 
C)  Real numbers contain decimal points. 
D)  Variable name identifiers must begin with a lowercase letter. 
A)  Primitive types are keywords. 
B)  Primitive types must appear in all lowercase letters. 
C)  Real numbers contain decimal points. 
D)  Variable name identifiers must begin with a lowercase letter. D

Question 2

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

Accepted Answer

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 ); 
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 ); A

Question 3

Which of the following is a variable declaration statement?

Accepted Answer

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

Question 4

End-of-line comments that should be ignored by the compiler are denoted using

Accepted Answer

A)  Two forward slashes ( // ). 
B)  Three forward slashes ( /// ). 
C)  A slash and a star ( /* ). 
D)  A slash and two stars ( /** ). 
A)  Two forward slashes ( // ). 
B)  Three forward slashes ( /// ). 
C)  A slash and a star ( /* ). 
D)  A slash and two stars ( /** ).

Question 5

Which of the following is not an arithmetic operator?

Accepted Answer

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

Question 6

Which of the following is not a compilation error?

Accepted Answer

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. 
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 7

Portions of statements that contain calculations are called

Accepted Answer

A)  variables. 
B)  constants. 
C)  expressions. 
D)  None of the above. 
A)  variables. 
B)  constants. 
C)  expressions. 
D)  None of the above.

Question 8

A(n) ________ enables a program to read data from the user.

Accepted Answer

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

Question 9

Which of the following statement displays Hello World?

Accepted Answer

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" ); 
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 10

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

Accepted Answer

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

Question 11

Programs remember numbers and other data in the computer's memory and access that data through program elements called

Accepted Answer

A)  comments. 
B)  messages. 
C)  integers. 
D)  variables. 
A)  comments. 
B)  messages. 
C)  integers. 
D)  variables.

Question 12

Which of the following statements is true?

Accepted Answer

A)  System.out.print("Enter your age: "); prompts the user to take action. 
B)  Class names typically begin with a capital letter. 
C)  Package java.lang is imported in every Java program. 
D)  All of the above are true. 
A)  System.out.print("Enter your age: "); prompts the user to take action. 
B)  Class names typically begin with a capital letter. 
C)  Package java.lang is imported in every Java program. 
D)  All of the above are true.

Question 13

All import declarations must be placed

Accepted Answer

A)  inside the class declaration's body. 
B)  before the class declaration. 
C)  after the class declaration. 
D)  all of the above will work. 
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 14

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

Accepted Answer

A)  Hello World. 
B)  helloWorld 
C)  Hello  World 
D)  World hello 
A)  Hello World. 
B)  helloWorld 
C)  Hello  World 
D)  World hello

Question 15

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

Accepted Answer

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

Question 16

The filename for the public class that begins with public class Addition must be

Accepted Answer

A)  public.java. 
B)  public.class.java. 
C)  Addition.java. 
D)  addition.java. 
A)  public.java. 
B)  public.class.java. 
C)  Addition.java. 
D)  addition.java.

Question 17

Which command executes the Java class file Welcome.class?

Accepted Answer

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

Question 18

Which of the following does not contain a syntax error?

Accepted Answer

A)  system.out.println( 'Hello world!' ): 
B)  System. out.println( "Hello world!" ); 
C)  System.out. println( "Hello world!" ); 
D)  System.out.println(  Hello world! ); 
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 19

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

Accepted Answer

A)  a  b c != d 
D)  a < b c < d
A != b 
A)  a  b c != d 
D)  a < b c < d
A != b

Question 20

Which of the following is not a Java primitive type?

Accepted Answer

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

Exam 2: Introduction to Java Applications

Which of the following statements is false?

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

Which of the following is a variable declaration statement?

End-of-line comments that should be ignored by the compiler are denoted using

Which of the following is not an arithmetic operator?

Which of the following is not a compilation error?

Portions of statements that contain calculations are called

A(n) ________ enables a program to read data from the user.

Which of the following statement displays Hello World?

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

Programs remember numbers and other data in the computer's memory and access that data through program elements called

Which of the following statements is true?

All import declarations must be placed

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

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

The filename for the public class that begins with public class Addition must be

Which command executes the Java class file Welcome.class?

Which of the following does not contain a syntax error?

Which of the following is not a Java primitive type?

Introduction to Computers and Java

Control Statements

Control Statements

Methods

Arrays and Arraylists

Introduction to Classes and Objects

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components

Graphics and Java 2D

Fundamentals of Characters and Strings

Files, Streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

GUI

Concurrency

Accessing Databases With JDBC

JavaFX

Filters