Question 1

Which of the following is the escape character?

Accepted Answer

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

Question 2

Which of the following is not a valid Java identifier?

Accepted Answer

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

Question 3

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 C

Question 4

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 5

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 6

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

Accepted Answer

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" ); 
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 7

Given the Java statement
Sum = number1 + number2;
Which of the following statements is false?

Accepted Answer

A) It's an assignment statement. 
B) It calculates the sum of variables number1 and number2. 
C) The operands of the addition operator are number1 and number2. 
D) It assigns the value of number1 to sum. 
A) It's an assignment statement. 
B) It calculates the sum of variables number1 and number2. 
C) The operands of the addition operator are number1 and number2. 
D) It assigns the value of number1 to sum.

Question 8

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 9

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

Accepted Answer

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

Question 10

Given the Java statement
Number1 = input.nextInt();
In which number1 is an int and input is a Scanner,which of the following occurs if the user does not enter a valid int value?

Accepted Answer

A) A compilation error occurs. 
B) The program continues executing and assigns the value 0 to number1. 
C) A runtime logic error occurs. 
D) None of the above. 
A) A compilation error occurs. 
B) The program continues executing and assigns the value 0 to number1. 
C) A runtime logic error occurs. 
D) None of the above.

Question 11

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 12

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

Accepted Answer

A)  
A)

Question 13

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 14

What is the value of result after the following Java statements execute (assume all variables are of type int)?
A = 4;
B = 12;
C = 37;
D = 51;
Result = d % a * c + a % b + a;

Accepted Answer

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

Question 15

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 16

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 17

Java's predefined classes are grouped into

Accepted Answer

A) packets. 
B) declarations. 
C) Galleries. 
D) packages. 
A) packets. 
B) declarations. 
C) Galleries. 
D) packages.

Question 18

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 19

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 20

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.

Exam 2: Introduction to Java Applications

Which of the following is the escape character?

Which of the following is not a valid Java identifier?

Which command executes the Java class file Welcome.class?

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

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

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

Given the Java statement Sum = number1 + number2; Which of the following statements is false?

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

Given the Java statement Number1 = input.nextInt(); In which number1 is an int and input is a Scanner,which of the following occurs if the user does not enter a valid int value?

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

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

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

What is the value of result after the following Java statements execute (assume all variables are of type int)? A = 4; B = 12; C = 37; D = 51; Result = d % a * c + a % b + a;

Which of the following statement displays Hello World?

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

Java's predefined classes are grouped into

Portions of statements that contain calculations are called

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 false?

Introduction to Computers and Java

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components: Part 1

Graphics and Java 2D

Strings

Files,streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

JavaFX

Filters