Question 1

Local variables must be ________.

Accepted Answer

A) initialized when they're declared. 
B) initialized before their values are used in an expression. 
C) declared and initialized in two steps. 
D) declared at the top of the method's body. 
A) initialized when they're declared. 
B) initialized before their values are used in an expression. 
C) declared and initialized in two steps. 
D) declared at the top of the method's body.

Question 2

Which of the following is not a control structure:

Accepted Answer

A) Sequence structure. 
B) Selection structure. 
C) Repetition structure. 
D) Declaration structure. 
A) Sequence structure. 
B) Selection structure. 
C) Repetition structure. 
D) Declaration structure.

Question 3

Which of the following terms is not used to refer to a sentinel value that breaks out of a while loop?

Accepted Answer

A) signal value. 
B) maximum value. 
C) dummy value. 
D) flag value. 
A) signal value. 
B) maximum value. 
C) dummy value. 
D) flag value.

Question 4

Which of the following is not a primitive type?

Accepted Answer

A) char 
B) float 
C) String 
D) int 
A) char 
B) float 
C) String 
D) int

Question 5

Which of the following is not represented graphically in activity diagrams for control structures?

Accepted Answer

A) Transition arrow. 
B) Attribute. 
C) Action state. 
D) Decision symbol. 
A) Transition arrow. 
B) Attribute. 
C) Action state. 
D) Decision symbol.

Question 6

Which of the following operators associates from left to right?

Accepted Answer

A) = 
B) (?:) 
C) %= 
D) / 
A) = 
B) (?:) 
C) %= 
D) /

Question 7

Which of the following is true?

Accepted Answer

A) Pseudocode is used to describe an algorithm. 
B) Pseudocode is not an actual computer programming language. 
C) Pseudocode is used to describe executable statements that will eventually be translated by the programmer into a program. 
D) All of the above. 
A) Pseudocode is used to describe an algorithm. 
B) Pseudocode is not an actual computer programming language. 
C) Pseudocode is used to describe executable statements that will eventually be translated by the programmer into a program. 
D) All of the above.

Question 8

Where can local variables declared within a method's body be used?

Accepted Answer

A) Only in that method between the line in which they were declared and the closing brace of that method. 
B) Same as (a),but not within while or if statements. 
C) Only within while or if statements within the method in which they were declared. 
D) Anywhere within the class. 
A) Only in that method between the line in which they were declared and the closing brace of that method. 
B) Same as (a),but not within while or if statements. 
C) Only within while or if statements within the method in which they were declared. 
D) Anywhere within the class.

Question 9

Which of the following statements is false?

Accepted Answer

A) You should not call methods from constructors. 
B) Nested if statements can be useful for validating values. 
C) Logical operators can express nested if statements more concisely. 
D) One problem with calling methods from constructors is that it can lead to duplicated validation code. 
A) You should not call methods from constructors. 
B) Nested if statements can be useful for validating values. 
C) Logical operators can express nested if statements more concisely. 
D) One problem with calling methods from constructors is that it can lead to duplicated validation code.

Question 10

Which primitive type can hold the largest value?

Accepted Answer

A) int 
B) long 
C) float 
D) double 
A) int 
B) long 
C) float 
D) double

Question 11

Which statement is true?

Accepted Answer

A) Dividing two integers results in integer division. 
B) With integer division,any fractional part of the calculation is lost. 
C) With integer division,any fractional part of the calculation is truncated. 
D) All of the above. 
A) Dividing two integers results in integer division. 
B) With integer division,any fractional part of the calculation is lost. 
C) With integer division,any fractional part of the calculation is truncated. 
D) All of the above.

Question 12

What is the result value of c at the end of the following code segment?
Int c = 8;
C++;
++c;
C %= 5;

Accepted Answer

A) 0. 
B) 1. 
C) 3. 
D) None of the above. 
A) 0. 
B) 1. 
C) 3. 
D) None of the above.

Question 13

Keyword ________ indicates the inheritance relationship.

Accepted Answer

A) extends 
B) inherits 
C) super 
D) parent 
A) extends 
B) inherits 
C) super 
D) parent

Question 14

The empty statement is denoted by what symbol?

Accepted Answer

A) Semicolon ; 
B) Parentheses () 
C) Braces {} 
D) Colon : 
A) Semicolon ; 
B) Parentheses () 
C) Braces {} 
D) Colon :

Question 15

Which of the following statements is true?

Accepted Answer

A) A while statement cannot be nested inside another while statement. 
B) An if statement cannot be nested inside another if statement. 
C) A while statement cannot be nested inside an if statement. 
D) None of the above is true. 
A) A while statement cannot be nested inside another while statement. 
B) An if statement cannot be nested inside another if statement. 
C) A while statement cannot be nested inside an if statement. 
D) None of the above is true.

Question 16

Which of the following code segments does not increment val by 3:

Accepted Answer

A) val += 3; 
B) val = val + 1;
Val = val + 1;
Val = val + 1; 
C) c = 3;
Val = val + (c == 3 ? 2 : 3); 
D) All of the above increment val by 3. 
A) val += 3; 
B) val = val + 1;
Val = val + 1;
Val = val + 1; 
C) c = 3;
Val = val + (c == 3 ? 2 : 3); 
D) All of the above increment val by 3.

Question 17

Which of the following is a double-selection control statement?

Accepted Answer

A) do…while 
B) for 
C) if…else 
D) if 
A) do…while 
B) for 
C) if…else 
D) if

Question 18

Java is considered a strongly typed language because:

Accepted Answer

A) The primitive types in Java are portable across all computer platforms that support Java. 
B) Java requires all variables to have a type before they can be used in a program. 
C) Instance variables of the primitive types are automatically assigned a default value. 
D) All of the above. 
A) The primitive types in Java are portable across all computer platforms that support Java. 
B) Java requires all variables to have a type before they can be used in a program. 
C) Instance variables of the primitive types are automatically assigned a default value. 
D) All of the above.

Question 19

What is the size in bits of an int?

Accepted Answer

A) 8 
B) 16 
C) 32 
D) 64 
A) 8 
B) 16 
C) 32 
D) 64

Question 20

What is output by the following Java code segment? Int temp = 180; If (temp > 90) { System.out.println("This porridge is too hot."); // cool down Temp = temp - (temp > 150 ? 100 : 20); } Else { If (temp < 70) { System.out.println("This porridge is too cold."); // warm up Temp = temp + (temp < 50 ? 30 : 20); } } If (temp == 80) System.out.println("This porridge is just right!");

Accepted Answer

A) This porridge is too hot. 
B) This porridge is too cold.
This porridge is just right! 
C) This porridge is just right! 
D) None of the above. 
A) This porridge is too hot. 
B) This porridge is too cold.
This porridge is just right! 
C) This porridge is just right! 
D) None of the above.

Exam 4: Control Statements: Part 1

Local variables must be ________.

Which of the following is not a control structure:

Which of the following terms is not used to refer to a sentinel value that breaks out of a while loop?

Which of the following is not a primitive type?

Which of the following is not represented graphically in activity diagrams for control structures?

Which of the following operators associates from left to right?

Which of the following is true?

Where can local variables declared within a method's body be used?

Which of the following statements is false?

Which primitive type can hold the largest value?

Which statement is true?

What is the result value of c at the end of the following code segment? Int c = 8; C++; ++c; C %= 5;

Keyword ________ indicates the inheritance relationship.

The empty statement is denoted by what symbol?

Which of the following statements is true?

Which of the following code segments does not increment val by 3:

Which of the following is a double-selection control statement?

Java is considered a strongly typed language because:

What is the size in bits of an int?

Introduction to Computers and Java

Introduction to Java Applications

Introduction to Classes and Objects

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