Question 1

In Java, selection statements consist of the if and if-else statements.

Accepted Answer

A) True 
 B)False

Question 2

The break statement does which of the following?

Accepted Answer

A)  ends the program 
B)  transfers control out of the current control structure such as a loop or switch statement 
C)  ends the current line of output, returning the cursor 
D)  denotes the ending of a switch statement 
E)  indicates the end of line when using System.out.print 
A)  ends the program 
B)  transfers control out of the current control structure such as a loop or switch statement 
C)  ends the current line of output, returning the cursor 
D)  denotes the ending of a switch statement 
E)  indicates the end of line when using System.out.print

Question 3

For the questions below, assume that boolean done = false, int x = 10, int y = 11, String s = "Help" and String t = "Goodbye".
-The expression (done | | s.compareTo(t) < 0) is True.

Accepted Answer

A) True 
 B)False

Question 4

Consider the following outline of a nested if-else structure which has more if clauses than else clauses. Which of the statements below is True regarding this structure?
If (condition1)
If (condition2)
Statement1;
Else statement2;

Accepted Answer

A)  syntactically it is invalid to have more if clauses than else clauses 
B)  statement2 will only execute if condition1 is false and condition2 is false 
C)  statement2 will only execute if condition1 is True and condition2 is false 
D)  statement2 will only execute if condition1 is false, it does not matter what condition2 is 
E)  statement2 will never execute 
A)  syntactically it is invalid to have more if clauses than else clauses 
B)  statement2 will only execute if condition1 is false and condition2 is false 
C)  statement2 will only execute if condition1 is True and condition2 is false 
D)  statement2 will only execute if condition1 is false, it does not matter what condition2 is 
E)  statement2 will never execute

Question 5

Given the nested if-else structure below, answer questions below.
if (a > 0)
if (b  5)
x = x + 4;
else
x = x + 3;
else
x = x + 2;
-If x is currently 0, a = 5 and b = 5, what will x become after the above statement is executed?

Accepted Answer

A)  0 
B)  2 
C)  3 
D)  4 
E)  5 
A)  0 
B)  2 
C)  3 
D)  4 
E)  5

Question 6

Consider the following code that will assign a letter grade of 'A', 'B', 'C', 'D', or 'F' depending on a student's test score. if (score >= 90) grade = 'A';
If (score >= 80) grade = 'B';
If (score >= 70) grade = 'C';
If (score >= 60) grade = 'D';
Else grade = 'F';

Accepted Answer

A) This code will work correctly in all cases B) This code will work correctly only if grade >= 60 C) This code will work correctly only if grade < 60 D) This code will work correctly only if grade < 70 E) This code will not work correctly under any circumstances A) This code will work correctly in all cases B) This code will work correctly only if grade >= 60 C) This code will work correctly only if grade < 60 D) This code will work correctly only if grade < 70 E) This code will not work correctly under any circumstances

Question 7

Given the nested if-else structure below, answer questions below.
if (a > 0)
if (b  5)
x = x + 4;
else
x = x + 3;
else
x = x + 2;
-If x is currently 0, a = 0 and b = -5, what will x become after the above statement is executed?

Accepted Answer

A)  0 
B)  2 
C)  3 
D)  4 
E)  5 
A)  0 
B)  2 
C)  3 
D)  4 
E)  5

Question 8

A truth table shows, for the various True or false values of boolean variables, what the result of a boolean condition is. Fill in the following truth table. Assume that a, b and c are boolean variables.
a b c ! (a && b) | | ! (a && c)
false false false
false false True
false True false
false True True
True false false
True false True
True True false
True True True

Accepted Answer

a b c ! (a && b) | | ! (a && c)
False Fa

Question 9

Assume that x and y are int variables with x = 5, y = 3, and a and d are char variables with a = 'a' and d = 'A', and examine the following conditions: Condition 1: (x  0)
Condition 2: (a != d || x != 5)
Condition 3: !(True && false)
Condition 4: (x > y || a == 'A' || d != 'A')

Accepted Answer

A)  All 4 Conditions are True 
B)  Only Condition 2 is True 
C)  Condition 2 and Condition 4 are True only 
D)  Conditions 2, 3 and 4 are all True, Condition 1 is not 
E)  All 4 Conditions are false 
A)  All 4 Conditions are True 
B)  Only Condition 2 is True 
C)  Condition 2 and Condition 4 are True only 
D)  Conditions 2, 3 and 4 are all True, Condition 1 is not 
E)  All 4 Conditions are false

Question 10

The following code has a syntax error immediately before the word else. What is the error and why does it arise?
 Fix the code so that this statement is a legal if-else statement.
if (x < 0) ; x++;
else x--;

Accepted Answer

The error is "else without if" and it ar

Question 11

Assume that count is 0, total is 20 and max is 1. The following statement will do which of the following? if (count != 0 && total / count > max) max = total / count;

Accepted Answer

A)  The condition short circuits and the assignment statement is not executed 
B)  The condition short circuits and the assignment statement is executed without problem 
C)  The condition does not short circuit causing a division by zero error 
D)  The condition short circuits so that there is no division by zero error when evaluating the condition, but the assignment statement causes a division by zero error 
E)  The condition will not compile because it uses improper syntax 
A)  The condition short circuits and the assignment statement is not executed 
B)  The condition short circuits and the assignment statement is executed without problem 
C)  The condition does not short circuit causing a division by zero error 
D)  The condition short circuits so that there is no division by zero error when evaluating the condition, but the assignment statement causes a division by zero error 
E)  The condition will not compile because it uses improper syntax

Question 12

What is wrong, logically, with the following code?
If (x > 10) System.out.println("Large");
Else if (x > 6 && x  3 && x <= 6) System.out.println("Small");
Else System.out.println("Very small");

Accepted Answer

A)  There is no logical error, but there is no need to have (x  6) in the second conditional or (x > 3) in the third conditional 
C)  The logical error is that no matter what value x is, "Very small" is always printed out 
D)  The logical error is that no matter what value x is, "Large" is always printed out 
E)  There is nothing wrong with the logic at all 
A)  There is no logical error, but there is no need to have (x  6) in the second conditional or (x > 3) in the third conditional 
C)  The logical error is that no matter what value x is, "Very small" is always printed out 
D)  The logical error is that no matter what value x is, "Large" is always printed out 
E)  There is nothing wrong with the logic at all

Question 13

The statement if (a >= b) a++; else b--; will do the same thing as the statement if (a < b) b--; else a++;.

Accepted Answer

A) True 
 B)False

Question 14

For the questions below, assume that boolean done = false, int x = 10, int y = 11, String s = "Help" and String t = "Goodbye".
-The expression (s.concat(t).length( ) < y) is True.

Accepted Answer

A) True 
 B)False

Question 15

If x is an int where x = 0, what will x be after the following loop terminates?
While (x < 100)
X *= 2;

Accepted Answer

A)  2 
B)  64 
C)  100 
D)  128 
E)  none of the above, this is an infinite loop 
A)  2 
B)  64 
C)  100 
D)  128 
E)  none of the above, this is an infinite loop

Question 16

A truth table shows, for the various True or false values of boolean variables, what the result of a boolean condition is. Fill in the following truth table. Assume that a, b and c are boolean variables.
a b c a && (!b | | c)
false false false
false false True
false True false
false True True
True false false
True false True
True True false
True True True

Accepted Answer

a b c a && (!b | | c)
False Fa

Question 17

Given the nested if-else structure below, answer questions below.
if (a > 0)
if (b  5)
x = x + 4;
else
x = x + 3;
else
x = x + 2;
-If x is currently 0, a = 1 and b = -1, what will x become after the above statement is executed?

Accepted Answer

A)  0 
B)  2 
C)  3 
D)  4 
E)  5 
A)  0 
B)  2 
C)  3 
D)  4 
E)  5

In Java, selection statements consist of the if and if-else statements.

The break statement does which of the following?

For the questions below, assume that boolean done = false, int x = 10, int y = 11, String s = "Help" and String t = "Goodbye". -The expression (done | | s.compareTo(t) < 0) is True.

Consider the following outline of a nested if-else structure which has more if clauses than else clauses. Which of the statements below is True regarding this structure? If (condition1) If (condition2) Statement1; Else statement2;

Given the nested if-else structure below, answer questions below. if (a > 0) if (b < 0) x = x + 5; else if (a > 5) x = x + 4; else x = x + 3; else x = x + 2; -If x is currently 0, a = 5 and b = 5, what will x become after the above statement is executed?

Consider the following code that will assign a letter grade of 'A', 'B', 'C', 'D', or 'F' depending on a student's test score. if (score >= 90) grade = 'A'; If (score >= 80) grade = 'B'; If (score >= 70) grade = 'C'; If (score >= 60) grade = 'D'; Else grade = 'F';

Given the nested if-else structure below, answer questions below. if (a > 0) if (b < 0) x = x + 5; else if (a > 5) x = x + 4; else x = x + 3; else x = x + 2; -If x is currently 0, a = 0 and b = -5, what will x become after the above statement is executed?

Assume that x and y are int variables with x = 5, y = 3, and a and d are char variables with a = 'a' and d = 'A', and examine the following conditions: Condition 1: (x < y && x > 0) Condition 2: (a != d || x != 5) Condition 3: !(True && false) Condition 4: (x > y || a == 'A' || d != 'A')

The following code has a syntax error immediately before the word else. What is the error and why does it arise? Fix the code so that this statement is a legal if-else statement. if (x < 0) ; x++; else x--;

Assume that count is 0, total is 20 and max is 1. The following statement will do which of the following? if (count != 0 && total / count > max) max = total / count;

What is wrong, logically, with the following code? If (x > 10) System.out.println("Large"); Else if (x > 6 && x <= 10) System.out.println("Medium"); Else if (x > 3 && x <= 6) System.out.println("Small"); Else System.out.println("Very small");

The statement if (a >= b) a++; else b--; will do the same thing as the statement if (a < b) b--; else a++;.

For the questions below, assume that boolean done = false, int x = 10, int y = 11, String s = "Help" and String t = "Goodbye". -The expression (s.concat(t).length( ) < y) is True.

If x is an int where x = 0, what will x be after the following loop terminates? While (x < 100) X *= 2;

Given the nested if-else structure below, answer questions below. if (a > 0) if (b < 0) x = x + 5; else if (a > 5) x = x + 4; else x = x + 3; else x = x + 2; -If x is currently 0, a = 1 and b = -1, what will x become after the above statement is executed?

Introduction

Data and Expressions

Using Classes and Objects

Writing Classes

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters

Exam 5: Conditionals and Loops

In Java, selection statements consist of the if and if-else statements.

The break statement does which of the following?

For the questions below, assume that boolean done = false, int x = 10, int y = 11, String s = "Help" and String t = "Goodbye". -The expression (done | | s.compareTo(t) < 0) is True.

Consider the following outline of a nested if-else structure which has more if clauses than else clauses. Which of the statements below is True regarding this structure? If (condition1) If (condition2) Statement1; Else statement2;

Given the nested if-else structure below, answer questions below. if (a > 0) if (b < 0) x = x + 5; else if (a > 5) x = x + 4; else x = x + 3; else x = x + 2; -If x is currently 0, a = 5 and b = 5, what will x become after the above statement is executed?

Consider the following code that will assign a letter grade of 'A', 'B', 'C', 'D', or 'F' depending on a student's test score. if (score >= 90) grade = 'A'; If (score >= 80) grade = 'B'; If (score >= 70) grade = 'C'; If (score >= 60) grade = 'D'; Else grade = 'F';

Given the nested if-else structure below, answer questions below. if (a > 0) if (b < 0) x = x + 5; else if (a > 5) x = x + 4; else x = x + 3; else x = x + 2; -If x is currently 0, a = 0 and b = -5, what will x become after the above statement is executed?

Assume that x and y are int variables with x = 5, y = 3, and a and d are char variables with a = 'a' and d = 'A', and examine the following conditions: Condition 1: (x < y && x > 0) Condition 2: (a != d || x != 5) Condition 3: !(True && false) Condition 4: (x > y || a == 'A' || d != 'A')

The following code has a syntax error immediately before the word else. What is the error and why does it arise? Fix the code so that this statement is a legal if-else statement. if (x < 0) ; x++; else x--;

Assume that count is 0, total is 20 and max is 1. The following statement will do which of the following? if (count != 0 && total / count > max) max = total / count;

What is wrong, logically, with the following code? If (x > 10) System.out.println("Large"); Else if (x > 6 && x <= 10) System.out.println("Medium"); Else if (x > 3 && x <= 6) System.out.println("Small"); Else System.out.println("Very small");

The statement if (a >= b) a++; else b--; will do the same thing as the statement if (a < b) b--; else a++;.

For the questions below, assume that boolean done = false, int x = 10, int y = 11, String s = "Help" and String t = "Goodbye". -The expression (s.concat(t).length( ) < y) is True.

If x is an int where x = 0, what will x be after the following loop terminates? While (x < 100) X *= 2;

Given the nested if-else structure below, answer questions below. if (a > 0) if (b < 0) x = x + 5; else if (a > 5) x = x + 4; else x = x + 3; else x = x + 2; -If x is currently 0, a = 1 and b = -1, what will x become after the above statement is executed?

Introduction

Data and Expressions

Using Classes and Objects

Writing Classes

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters