Question 1

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. A

Question 2

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. D

Question 3

Which of the following statements is true?

Accepted Answer

A)  Both syntax errors and logic errors are caught by the compiler. 
B)  Both syntax errors and logic errors have effects at execution time. 
C)  Syntax errors are caught by the compiler. Logic errors have effects at execution time. 
D)  Logic errors are caught by the compiler. Syntax errors have effects at execution time. 
A)  Both syntax errors and logic errors are caught by the compiler. 
B)  Both syntax errors and logic errors have effects at execution time. 
C)  Syntax errors are caught by the compiler. Logic errors have effects at execution time. 
D)  Logic errors are caught by the compiler. Syntax errors have effects at execution time. C

Question 4

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.

Question 5

Which of the following statements is false?

Accepted Answer

A)  To ensure that the operands in a mixed-type expression are of the same type, Java performs implicit conversion on selected operands. 
B)  Cast operators are unary operators. 
C)  Cast operators associate from right to left and are one level lower in precedence than the multiplicative operators. 
D)  Cast operators are formed by placing parentheses around the name of a type. 
A)  To ensure that the operands in a mixed-type expression are of the same type, Java performs implicit conversion on selected operands. 
B)  Cast operators are unary operators. 
C)  Cast operators associate from right to left and are one level lower in precedence than the multiplicative operators. 
D)  Cast operators are formed by placing parentheses around the name of a type.

Question 6

What does the expression x %= 10 do?

Accepted Answer

A)  Adds 10 to the value of x, and stores the result in x. 
B)  Divides x by 10 and stores the remainder in x. 
C)  Divides x by 10 and stores the integer result in x. 
D)  None of the above. 
A)  Adds 10 to the value of x, and stores the result in x. 
B)  Divides x by 10 and stores the remainder in x. 
C)  Divides x by 10 and stores the integer result in x. 
D)  None of the above.

Question 7

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 8

Which statement is false?

Accepted Answer

A)  Unless directed otherwise, the computer executes Java statements one after the other in the order in which they're written. 
B)  Activity diagrams normally show the Java code that implements the activity. 
C)  Like pseudocode, activity diagrams help programmers develop and represent algorithms. 
D)  The arrows in the activity diagram represent transitions, which indicate the order in which the actions represented by the action states occur. 
A)  Unless directed otherwise, the computer executes Java statements one after the other in the order in which they're written. 
B)  Activity diagrams normally show the Java code that implements the activity. 
C)  Like pseudocode, activity diagrams help programmers develop and represent algorithms. 
D)  The arrows in the activity diagram represent transitions, which indicate the order in which the actions represented by the action states occur.

Question 9

A decision symbol in an activity diagram takes the shape of a ________.

Accepted Answer

A)  Diamond. 
B)  Rectangle. 
C)  Circle. 
D)  Triangle. 
A)  Diamond. 
B)  Rectangle. 
C)  Circle. 
D)  Triangle.

Question 10

Counter-controlled iteration is also known as:

Accepted Answer

A)  Definite iteration 
B)  Indefinite iteration 
C)  Multiple-iteration structure 
D)  Double-iteration structure 
A)  Definite iteration 
B)  Indefinite iteration 
C)  Multiple-iteration structure 
D)  Double-iteration structure

Question 11

Which of the following operators associates from left to right?

Accepted Answer

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

Question 12

What is output by the following Java code segment?
 int temp = 200;
If (temp > 90) {
System.out.println("This porridge is too hot.");
}
If (temp < 70) {
System.out.println("This porridge is too cold.");
}
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. 
C)  This porridge is just right! 
D)  None of the above. 
A)  This porridge is too hot. 
B)  This porridge is too cold. 
C)  This porridge is just right! 
D)  None of the above.

Question 13

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 14

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 15

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 16

Which of the following segments is a proper way to call the method readData four times?

Accepted Answer

A)  double k = 0.0;
While (k != 4) {
ReadData();
K = k + 1;
} 
B)  int i = 0;
While (i <= 4) {
ReadData();
I = i + 1;
} 
C)  int i = 0;
While (i < 4) {
ReadData();
} 
D)  int i = 0;
While (i < 4) {
ReadData();
I = i + 1;
} 
A)  double k = 0.0;
While (k != 4) {
ReadData();
K = k + 1;
} 
B)  int i = 0;
While (i <= 4) {
ReadData();
I = i + 1;
} 
C)  int i = 0;
While (i < 4) {
ReadData();
} 
D)  int i = 0;
While (i < 4) {
ReadData();
I = i + 1;
}

Question 17

In an activity diagram, the merge symbol has the same shape as what other symbol?

Accepted Answer

A)  Decision symbol. 
B)  Action symbol. 
C)  Transition arrows. 
D)  Initial state. 
A)  Decision symbol. 
B)  Action symbol. 
C)  Transition arrows. 
D)  Initial state.

Question 18

Which of the following is not an error (either a syntax error or a logic error)?

Accepted Answer

A)  Neglecting to include an action in the body of a while statement that will eventually cause the condition to become false. 
B)  Spelling a keyword (such as while or if) with a capitalized first letter. 
C)  Using a condition for a while statement that is initially false. 
D)  An infinite loop. 
A)  Neglecting to include an action in the body of a while statement that will eventually cause the condition to become false. 
B)  Spelling a keyword (such as while or if) with a capitalized first letter. 
C)  Using a condition for a while statement that is initially false. 
D)  An infinite loop.

Question 19

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 20

Which of the following is not a control structure:

Accepted Answer

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

Exam 4: Control Statements: Assignment, and Operators

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

Which statement is true?

Which of the following statements is true?

Which of the following statements is false?

What does the expression x %= 10 do?

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

Which statement is false?

A decision symbol in an activity diagram takes the shape of a ________.

Counter-controlled iteration is also known as:

Which of the following operators associates from left to right?

What is output by the following Java code segment? int temp = 200; If (temp > 90) { System.out.println("This porridge is too hot."); } If (temp < 70) { System.out.println("This porridge is too cold."); } If (temp == 80) { System.out.println("This porridge is just right!"); }

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 code segments does not increment val by 3:

Which primitive type can hold the largest value?

Which of the following segments is a proper way to call the method readData four times?

In an activity diagram, the merge symbol has the same shape as what other symbol?

Which of the following is not an error (either a syntax error or a logic error)?

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

Which of the following is not a control structure:

Introduction to Computers, the Internet and Java

Introduction to Java Applications; Inputoutput and Operators

Introduction to Classes, Objects, Methods and Strings

Control Statements: Logical Operators

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism and Interfaces

Exception Handling: a Deeper Look

Javafx Graphical User Interfaces

Javafx Gui

Strings, Characters and Regular Expressions

Files, Inputoutput Streams, Nio and Xml Serialization

Generic Collections

Lambdas and Streams

Recursion

Searching, Sorting and Big O

Generic Classes and Methods: a Deeper Look

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

Swing Gui Components

Graphics and Java 2d

Networking

Java Persistence Api Jpa

Javaserver Faces Web Apps

Javaserver Faces Web Apps

Swing Gui Components

Filters