Question 1

If x is a variable of type int,what is the largest possible value of the expression (x % 5)?

Accepted Answer

A) 1 
B) 4 
C) 5 
D) 2³¹-1 
A) 1 
B) 4 
C) 5 
D) 2³¹-1 B

Question 2

If s = "hello,world" (with exactly one space between the comma and 'w'),what does s.indexOf(",")return?

Accepted Answer

5

Question 3

A statement invoking a constructor should also use the Java keyword ______.

Accepted Answer

A) class 
B) return 
C) public 
D) new 
A) class 
B) return 
C) public 
D) new D

Question 4

What does it mean for the return type of a method to be void?

Accepted Answer

A) The method will never return a value. 
B) The method will return the value zero. 
C) The method does not take parameters. 
D) The method does not have a body. 
A) The method will never return a value. 
B) The method will return the value zero. 
C) The method does not take parameters. 
D) The method does not have a body.

Question 5

Short-circuit evaluation refers to:

Accepted Answer

A) Jumping from the try block to the catch block when an exception is thrown. 
B) Avoiding the testing of a boolean condition that is unnecessary. 
C) Truncating the integer result of a division operation. 
D) Avoiding the execution of the else clause of an if-statement. 
A) Jumping from the try block to the catch block when an exception is thrown. 
B) Avoiding the testing of a boolean condition that is unnecessary. 
C) Truncating the integer result of a division operation. 
D) Avoiding the execution of the else clause of an if-statement.

Question 6

All Java classes must contain a method called main.

Accepted Answer

A) True 
 B)False

Question 7

Which of these expressions is illegal in Java?

Accepted Answer

A) x++ 5 
B) x =+ 5 
C) x += 5 
D) x == 5 
A) x++ 5 
B) x =+ 5 
C) x += 5 
D) x == 5

Question 8

What is wrong with this loop? How would you fix it?
int num = 1;
while (num <= 10){
System.out.println("num = " + num);
}

Accepted Answer

It is an infinite loop.After t

Question 9

If d is a double and i is an int,then the assignment statement d = i;is legal in Java.

Accepted Answer

A) True 
 B)False

Question 10

Which is not a primitive type in Java?

Accepted Answer

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

Question 11

What is the meaning of the declaration: String [][] a = new String [60][80];?

Accepted Answer

A) Create an array of 60 strings,each of size 80 characters. 
B) Create an array of 80 strings,each of size 60 characters. 
C) Create a two-dimensional array of strings with 60 columns and 80 rows. 
D) Create a two-dimensional array of strings with 60 rows and 80 columns. 
A) Create an array of 60 strings,each of size 80 characters. 
B) Create an array of 80 strings,each of size 60 characters. 
C) Create a two-dimensional array of strings with 60 columns and 80 rows. 
D) Create a two-dimensional array of strings with 60 rows and 80 columns.

Question 12

When using the method System.out.printf( ),what is the purpose of the %d format code?

Accepted Answer

A) For printing a double 
B) For printing a float 
C) For printing a String 
D) For printing an int 
A) For printing a double 
B) For printing a float 
C) For printing a String 
D) For printing an int

Question 13

The following code attempts to find the sum of the elements in the third column (from the left)of a two dimensional int array called a that has 10 rows and 20 columns.Correct the errors in the code.
int sum = 0;
for (int i = 0;i < 20;i++)
sum = sum + a[3][i];

Accepted Answer

The loop should be w

Question 14

In Java,when we write an if-statement of the form if(condition),the condition must evaluate to a boolean value.

Accepted Answer

A) True 
 B)False

Question 15

If s1 = "dog" and s2 = "cat",then s1.compareTo(s2)returns a positive integer value.

Accepted Answer

A) True 
 B)False

Question 16

Suppose a,b and c are the lengths of the 3 sides of a triangle.Write an if-statement that will determine if the triangle is isosceles (at least 2 of the 3 sides are equal).You may assume that a,b and c are of type int.

Accepted Answer

if (a == b || a == c

Question 17

Why does the Java statement System.out.println("answer = " + 3 + 4);
not print answer = 7 ?

Accepted Answer

Because the + operator is left

Question 18

How many constructors can a class have?

Accepted Answer

A) Exactly one 
B) At least one but no more than three 
C) Exactly the same as the number of data members 
D) There is no restriction on the number of constructors 
A) Exactly one 
B) At least one but no more than three 
C) Exactly the same as the number of data members 
D) There is no restriction on the number of constructors

Question 19

All Java programs must define at least one class.

Accepted Answer

A) True 
 B)False

Question 20

Suppose s1 is a String variable.We want to check to see if the first and last characters of s1 are the same.Complete the following if-statement to accomplish the task.
boolean same;
if (______________________________________________)
same = true;
else
same = false;

Accepted Answer

s1.charAt(

If x is a variable of type int,what is the largest possible value of the expression (x % 5)?

If s = "hello,world" (with exactly one space between the comma and 'w'),what does s.indexOf(",")return?

A statement invoking a constructor should also use the Java keyword ______.

What does it mean for the return type of a method to be void?

Short-circuit evaluation refers to:

All Java classes must contain a method called main.

Which of these expressions is illegal in Java?

What is wrong with this loop? How would you fix it? int num = 1; while (num <= 10){ System.out.println("num = " + num); }

If d is a double and i is an int,then the assignment statement d = i;is legal in Java.

Which is not a primitive type in Java?

What is the meaning of the declaration: String [][] a = new String [60][80];?

When using the method System.out.printf( ),what is the purpose of the %d format code?

The following code attempts to find the sum of the elements in the third column (from the left)of a two dimensional int array called a that has 10 rows and 20 columns.Correct the errors in the code. int sum = 0; for (int i = 0;i < 20;i++) sum = sum + a[3][i];

In Java,when we write an if-statement of the form if(condition),the condition must evaluate to a boolean value.

If s1 = "dog" and s2 = "cat",then s1.compareTo(s2)returns a positive integer value.

Suppose a,b and c are the lengths of the 3 sides of a triangle.Write an if-statement that will determine if the triangle is isosceles (at least 2 of the 3 sides are equal).You may assume that a,b and c are of type int.

Why does the Java statement System.out.println("answer = " + 3 + 4); not print answer = 7 ?

How many constructors can a class have?

All Java programs must define at least one class.

Suppose s1 is a String variable.We want to check to see if the first and last characters of s1 are the same.Complete the following if-statement to accomplish the task. boolean same; if (______________________________________________) same = true; else same = false;

Principles of Programming and Software Engineering

Recursion: the Mirrors

Data Abstraction: The Walls

Linked Lists

Problem Solving With Abstract Data Types

Stacks

Queues

Advanced Java Topics

Algorithm Efficiency and Sorting

Trees

Tables and Priority Queues

Advanced Implementations of Tables

Graphs

External Methods

Filters

Exam 1: Review of Java Fundamentals

If x is a variable of type int,what is the largest possible value of the expression (x % 5)?

If s = "hello,world" (with exactly one space between the comma and 'w'),what does s.indexOf(",")return?

A statement invoking a constructor should also use the Java keyword ______.

What does it mean for the return type of a method to be void?

Short-circuit evaluation refers to:

All Java classes must contain a method called main.

Which of these expressions is illegal in Java?

What is wrong with this loop? How would you fix it? int num = 1; while (num <= 10){ System.out.println("num = " + num); }

If d is a double and i is an int,then the assignment statement d = i;is legal in Java.

Which is not a primitive type in Java?

What is the meaning of the declaration: String [][] a = new String [60][80];?

When using the method System.out.printf( ),what is the purpose of the %d format code?

The following code attempts to find the sum of the elements in the third column (from the left)of a two dimensional int array called a that has 10 rows and 20 columns.Correct the errors in the code. int sum = 0; for (int i = 0;i < 20;i++) sum = sum + a[3][i];

In Java,when we write an if-statement of the form if(condition),the condition must evaluate to a boolean value.

If s1 = "dog" and s2 = "cat",then s1.compareTo(s2)returns a positive integer value.

Suppose a,b and c are the lengths of the 3 sides of a triangle.Write an if-statement that will determine if the triangle is isosceles (at least 2 of the 3 sides are equal).You may assume that a,b and c are of type int.

Why does the Java statement System.out.println("answer = " + 3 + 4); not print answer = 7 ?

How many constructors can a class have?

All Java programs must define at least one class.

Suppose s1 is a String variable.We want to check to see if the first and last characters of s1 are the same.Complete the following if-statement to accomplish the task. boolean same; if (______________________________________________) same = true; else same = false;

Principles of Programming and Software Engineering

Recursion: the Mirrors

Data Abstraction: The Walls

Linked Lists

Problem Solving With Abstract Data Types

Stacks

Queues

Advanced Java Topics

Algorithm Efficiency and Sorting

Trees

Tables and Priority Queues

Advanced Implementations of Tables

Graphs

External Methods

Filters