Question 1

Which of the following will not help prevent infinite loops?

Accepted Answer

A)  Include braces around the statements in a do…while statement. 
B)  Ensure that the header of a for or while statement is not followed by a semicolon. 
C)  If the loop is counter-controlled, the body of the loop should increment or decrement the counter as needed. 
D)  If the loop is sentinel-controlled, ensure that the sentinel value is input eventually. 
A)  Include braces around the statements in a do…while statement. 
B)  Ensure that the header of a for or while statement is not followed by a semicolon. 
C)  If the loop is counter-controlled, the body of the loop should increment or decrement the counter as needed. 
D)  If the loop is sentinel-controlled, ensure that the sentinel value is input eventually. A

Question 2

Consider the classes below:
 public class TestA {
Public static void main(String[] args) {
Int x = 2;
Int y = 20
Int counter = 0;
For (int j = y % x; j  0; --j) {
++counter;
}
}
}
Which of the following statements is true?

Accepted Answer

A)  The value of counter will be different at the end of each for loop for each class. 
B)  The value of j will be the same for each loop for all iterations 
C)  Both (a) and (b) are true. 
D)  Neither (a) nor (b) is true. 
A)  The value of counter will be different at the end of each for loop for each class. 
B)  The value of j will be the same for each loop for all iterations 
C)  Both (a) and (b) are true. 
D)  Neither (a) nor (b) is true. D

Question 3

Consider the following two Java code segments: 
Segment 1 Segment 2
Int i = 0;
For (int i = 0; i <= 20; i++) {
While (i < 20) { System.out.println(i);
I++; }
System.out.println(i);
}
Which of the following statements are true?

Accepted Answer

A)  The output from these segments is not the same. 
B)  The scope of the control variable i is different for the two segments. 
C)  Both (a) and (b) are true. 
D)  Neither (a) nor (b) is true. 
A)  The output from these segments is not the same. 
B)  The scope of the control variable i is different for the two segments. 
C)  Both (a) and (b) are true. 
D)  Neither (a) nor (b) is true. C

Question 4

For the code segment below:
 switch(q) {
Case 1:
System.out.println("apple");
Break;
Case 2:
System.out.println("orange");
Break;
Case 3:
System.out.println("banana");
Break;
Case 4:
System.out.println("pear");
Case 5:
System.out.println("grapes");
Default:
System.out.println("kiwi");
}
Which of the following values for q will result in kiwi being included in the output?

Accepted Answer

A)  2. 
B)  Any integer less than 1 and greater than or equal to 4. 
C)  1. 
D)  3. 
A)  2. 
B)  Any integer less than 1 and greater than or equal to 4. 
C)  1. 
D)  3.

Question 5

Suppose variable gender contains MALE and age equals 60, how is the expression (gender == FEMALE) && (age >= 65)
Evaluated?

Accepted Answer

A)  The condition (gender == FEMAL
E)  is evaluated first and the evaluation stops immediately. 
B)  The condition (age >= 65) is evaluated first and the evaluation stops immediately. 
C)  Both conditions are evaluated, from left to right. 
D)  Both conditions are evaluated, from right to left. 
A)  The condition (gender == FEMAL
E)  is evaluated first and the evaluation stops immediately. 
B)  The condition (age >= 65) is evaluated first and the evaluation stops immediately. 
C)  Both conditions are evaluated, from left to right. 
D)  Both conditions are evaluated, from right to left.

Question 6

Which statement prints the floating-point value 123.456 right justified with a field width of 10?

Accepted Answer

A)  System.out.printf("%d10.3", 123.456); 
B)  System.out.printf("%10.3d", 123.456); 
C)  System.out.printf("%f10.3", 123.456); 
D)  System.out.printf("%10.3f", 123.456); 
A)  System.out.printf("%d10.3", 123.456); 
B)  System.out.printf("%10.3d", 123.456); 
C)  System.out.printf("%f10.3", 123.456); 
D)  System.out.printf("%10.3f", 123.456);

Question 7

Which of the following statements about a do…while iteration statement is true?

Accepted Answer

A)  The body of a do…while loop is executed only if the terminating condition is true. 
B)  The body of a do…while loop is executed only once. 
C)  The body of a do…while loop is always executed at least once. 
D)  None of the above. 
A)  The body of a do…while loop is executed only if the terminating condition is true. 
B)  The body of a do…while loop is executed only once. 
C)  The body of a do…while loop is always executed at least once. 
D)  None of the above.

Question 8

Which of the following can be used in a switch statement in the expression after keyword case? 
A. a constant integral expression.
B. a character constant.
C. a String
D. an enumeration constant.

Accepted Answer

A)  A and B. 
B)  A and C. 
C)  B and C. 
D)  All. 
A)  A and B. 
B)  A and C. 
C)  B and C. 
D)  All.

Question 9

Consider the code segment below.
 if (gender == 1) {
If (age >= 65) {
++seniorFemales;
}
}
This segment is equivalent to which of the following?

Accepted Answer

A)  if (gender == 1 || age >= 65) { ++seniorFemales;
} 
B)  if (gender == 1 && age >= 65) { ++seniorFemales;
} 
C)  if (gender == 1 AND age >= 65) { ++seniorFemales;
} 
D)  if (gender == 1 OR age >= 65) { ++seniorFemales;
} 
A)  if (gender == 1 || age >= 65) { ++seniorFemales;
} 
B)  if (gender == 1 && age >= 65) { ++seniorFemales;
} 
C)  if (gender == 1 AND age >= 65) { ++seniorFemales;
} 
D)  if (gender == 1 OR age >= 65) { ++seniorFemales;
}

Question 10

Which of the following for-loop headers results in equivalent numbers of iterations: 
A. for (int q = 1; q = 0; q--)
C. for (int q = 99; q > 0; q -= 9)
D. for (int q = 990; q > 0; q -= 90)

Accepted Answer

A)  A and B. 
B)  C and D. 
C)  A and B have equivalent iterations and C and D have equivalent iterations. 
D)  None of the loops have equivalent iterations. 
A)  A and B. 
B)  C and D. 
C)  A and B have equivalent iterations and C and D have equivalent iterations. 
D)  None of the loops have equivalent iterations.

Question 11

Which case of the following would warrant using the boolean logical inclusive OR (|) rather than the conditional OR (||)?

Accepted Answer

A)  Testing if two conditions are both true. 
B)  Testing if at least one of two conditions is true. 
C)  Testing if at least one of two conditions is true when the right operand has a required side effect. 
D)  Testing if at least one of two conditions is true when the left operand has a required side effect. 
A)  Testing if two conditions are both true. 
B)  Testing if at least one of two conditions is true. 
C)  Testing if at least one of two conditions is true when the right operand has a required side effect. 
D)  Testing if at least one of two conditions is true when the left operand has a required side effect.

Question 12

Which of the following statements about the break statement is false?

Accepted Answer

A)  The break statement is used to exit an iteration structure early and continue execution after the loop. 
B)  A break statement can only break out of an immediately enclosing while, for, do…while or switch statement. 
C)  The break statement, when executed in a while, for or do…while, skips the remaining statements in the loop body and proceeds with the next iteration of the loop. 
D)  Common uses of the break statement are to escape early from a loop or to skip the remainder of a switch. 
A)  The break statement is used to exit an iteration structure early and continue execution after the loop. 
B)  A break statement can only break out of an immediately enclosing while, for, do…while or switch statement. 
C)  The break statement, when executed in a while, for or do…while, skips the remaining statements in the loop body and proceeds with the next iteration of the loop. 
D)  Common uses of the break statement are to escape early from a loop or to skip the remainder of a switch.

Question 13

Which of the following is not a type of iteration statement in Java?

Accepted Answer

A)  while statement. 
B)  do…while statement. 
C)  for statement. 
D)  loop statement. 
A)  while statement. 
B)  do…while statement. 
C)  for statement. 
D)  loop statement.

Question 14

Which formatting flag indicates that the floating-point values should be output with a thousands separator?

Accepted Answer

A)  plus (+). 
B)  minus (-). 
C)  comma (,). 
D)  period (.). 
A)  plus (+). 
B)  minus (-). 
C)  comma (,). 
D)  period (.).

Question 15

Which of the following statements is true?

Accepted Answer

A)  Strings can be used in a switch statement's controlling expression and in its case labels. 
B)  Strings can be used in a switch statement's controlling expression but not in its case labels. 
C)  Strings cannot be used in a switch statement's controlling expression but can be used in its case labels. 
D)  Strings cannot be used in a switch statement's controlling expression and cannot be used in its case labels. 
A)  Strings can be used in a switch statement's controlling expression and in its case labels. 
B)  Strings can be used in a switch statement's controlling expression but not in its case labels. 
C)  Strings cannot be used in a switch statement's controlling expression but can be used in its case labels. 
D)  Strings cannot be used in a switch statement's controlling expression and cannot be used in its case labels.

Question 16

Which of the following is equivalent to this code segment?
 int total = 0;
For (int i = 0; i <= 20; i += 2) {
Total += i;
}

Accepted Answer

A)  int total = 0; for (int i = 20; i < 0; i += 1) {
Total += i;
} 
B)  int total = 0; for (int i = 0; i <= 20; total += i, i += 2) {} 
C)  int total = 0; for (int i = 0, i <= 20, total += i; i += 2) {} 
D)  int total = 0; for (int i = 2; i < 20; total += i, i += 2) {} 
A)  int total = 0; for (int i = 20; i < 0; i += 1) {
Total += i;
} 
B)  int total = 0; for (int i = 0; i <= 20; total += i, i += 2) {} 
C)  int total = 0; for (int i = 0, i <= 20, total += i; i += 2) {} 
D)  int total = 0; for (int i = 2; i < 20; total += i, i += 2) {}

Question 17

Which expression is equivalent to if (!(grade == sentinelValue))?

Accepted Answer

A)  if (grade !== sentinelValue) 
B)  if (grade != sentinelValue) 
C)  ! if (grade == sentinelValue) 
D)  ! if (grade !== sentinelValue) 
A)  if (grade !== sentinelValue) 
B)  if (grade != sentinelValue) 
C)  ! if (grade == sentinelValue) 
D)  ! if (grade !== sentinelValue)

Question 18

For the two code segments below: 
Segment A
Int q = 5;
Switch(q) {
Case 1:
System.out.println(1);
Case 2:
System.out.println(2);
Case 3:
System.out.println(3);
Case 4:
System.out.println(4);
Case 5:
System.out.println(5);
Default:
System.out.println("default");
}
Segment B
Q = 4;
Switch(q) {
Case 1:
System.out.println(1);
Case 2:
System.out.println(2);
Case 3:
System.out.println(3);
Case 4:
System.out.println(4);
Case 5:
System.out.println(5);
Default:
System.out.println("default");
}
Which of the following statements is true?

Accepted Answer

A)  The output for Segment A is: default 
B)  The output for Segment B is: 4 
C)  The output for Segment B is: 45default 
D)  The output for Segment A is: 5
Default 
A)  The output for Segment A is: default 
B)  The output for Segment B is: 4 
C)  The output for Segment B is: 45default 
D)  The output for Segment A is: 5
Default

Question 19

Counter-controlled iteration requires

Accepted Answer

A)  A control variable and initial value. 
B)  A control variable increment (or decrement). 
C)  A condition that tests for the final value of the control variable. 
D)  All of the above. 
A)  A control variable and initial value. 
B)  A control variable increment (or decrement). 
C)  A condition that tests for the final value of the control variable. 
D)  All of the above.

Question 20

Which of the following statements about the switch statement is false?

Accepted Answer

A)  You can use Strings in a switch statement's controlling expression. 
B)  You can use a String in a switch statement's case label. 
C)  You can use a comma-separated list of Strings in a switch statement's case label. 
D)  You cannot use a String in a switch statement's default case label. 
A)  You can use Strings in a switch statement's controlling expression. 
B)  You can use a String in a switch statement's case label. 
C)  You can use a comma-separated list of Strings in a switch statement's case label. 
D)  You cannot use a String in a switch statement's default case label.

Exam 5: Control Statements: Logical Operators

Which of the following will not help prevent infinite loops?

Consider the following two Java code segments: Segment 1 Segment 2 Int i = 0; For (int i = 0; i <= 20; i++) { While (i < 20) { System.out.println(i); I++; } System.out.println(i); } Which of the following statements are true?

Suppose variable gender contains MALE and age equals 60, how is the expression (gender == FEMALE) && (age >= 65) Evaluated?

Which statement prints the floating-point value 123.456 right justified with a field width of 10?

Which of the following statements about a do…while iteration statement is true?

Which of the following can be used in a switch statement in the expression after keyword case? A. a constant integral expression. B. a character constant. C. a String D. an enumeration constant.

Consider the code segment below. if (gender == 1) { If (age >= 65) { ++seniorFemales; } } This segment is equivalent to which of the following?

Which of the following for-loop headers results in equivalent numbers of iterations: A. for (int q = 1; q <= 100; q++) B. for (int q = 100; q >= 0; q--) C. for (int q = 99; q > 0; q -= 9) D. for (int q = 990; q > 0; q -= 90)

Which case of the following would warrant using the boolean logical inclusive OR (|) rather than the conditional OR (||)?

Which of the following statements about the break statement is false?

Which of the following is not a type of iteration statement in Java?

Which formatting flag indicates that the floating-point values should be output with a thousands separator?

Which of the following statements is true?

Which of the following is equivalent to this code segment? int total = 0; For (int i = 0; i <= 20; i += 2) { Total += i; }

Which expression is equivalent to if (!(grade == sentinelValue))?

Counter-controlled iteration requires

Which of the following statements about the switch statement is false?

Introduction to Computers, the Internet and Java

Introduction to Java Applications; Inputoutput and Operators

Introduction to Classes, Objects, Methods and Strings

Control Statements: Assignment, and 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