Question 1

Which one of the following statements gives the absolute value of the floating-point number x = -25.50?

Accepted Answer

A)   abs(x) ;
B)   Math.abs(x) ;
C)   x.abs() ;
D)   x.absolute() ;E) B) and C)
F) None of the above

Question 2

How do you compute the length of the string str?

Accepted Answer

A)   length(str) 
B)   length.str
C)   str.length
D)   str.length() E) A) and D)
F) None of the above

Question 3

What is wrong with the following code snippet?
Int size = 42;
Cost = 9.99;
System.out.println("size = " + size) ;
System.out.println(" cost = " + cost) ;

Accepted Answer

A)   The code snippet uses a variable that has not yet been initialized.
B)   The code snippet uses a variable that has not been declared.
C)   The code snippet attempts to assign a decimal value to an integer variable.
D)   The code snippet attempts to assign an integer value to a decimal variable.E) All of the above
F) None of the above

Question 4

Given the definition final double PI = 3.14159; which of the following is the Java equivalent of the mathematical expression c =  π\piπ  . radius2

Accepted Answer

A)   c = PI * (radius * 2) ;
B)   c = PI * Math.pow(2, radius) ;
C)   c = PI * Math.pow(radius, 2) ;
D)   c = Math.pow(PI * radius, 2) ; E) B) and D)
F) C) and D)

Question 5

What (if any)  type of error occurs with the following code if the user input is ABC?
Public static void main(String[] args) 
{
Scanner in = new Scanner(System.in) ;
System.out.print("Enter a number: ") ;
String str = in.next() ;
Int count = Integer.parseInt(str) ;
System.out.println("Input is " + count) ;
}

Accepted Answer

A)   Compile-time error
B)   Run-time error
C)   Overflow error
D)   Illegal expressionE) All of the above
F) C) and D)

Question 6

Which of the following options is valid with reference to the code snippet?
Public static void main(String[] args) 
{
Double d = 45.326;
Double r = d % 9.0;
System.out.println(r) ;
}

Accepted Answer

A)   The value inside the variable r will be 0.326
B)   The value inside the variable r will be 5.036
C)   Variable r has to be defined as an integer because the % operator always returns an integer
D)   The initialization of variable r is wrong, because the % operator expects integer values as operandsE) None of the above
F) B) and C)

Question 7

The first step in problem solving is

Accepted Answer

A)   To write the expression that calculates the answer
B)   To understand the problem and its inputs and outputs
C)   To do examples by hand that confirm the solution will work
D)   To write Java code that can be executed and testedE) A) and B)
F) None of the above

Question 8

What is the output of the following code snippet?
Int counter = 0;
Counter++;
System.out.print("The initial value of the counter is ") ;
System.out.println(count) ;

Accepted Answer

A)   The initial value of the counter is 0
B)   The initial value of the counter is 1
C)   The code will not compile
D)   The initial value of the counter isE) All of the above
F) A) and C)

Question 9

At what point in the problem-solving process should one write pseudocode?

Accepted Answer

A)   After writing Java code, as a way to summarize the code's algorithm
B)   Before writing Java code, as a guide for a general solution
C)   After defining Java variables so that the pseudocode and data types make sense
D)   Before working out examples by hand in order to guide those examplesE) A) and B)
F) None of the above

Question 10

Consider the following Java variable names:
I. 1stInstance
II. basicInt%
III. empName_
IV. addressLine1
V. DISCOUNT
Which of the following options is correct?

Accepted Answer

A)   Only IV is a valid Java variable name.
B)   Only I and IV are valid Java variable names.
C)   Only I, IV, and V are valid Java variable names.
D)   Only III, IV, and V are valid Java variable names.E) B) and C)
F) All of the above

Question 11

Which one of the following statements displays the output as (1.23e+02) ?

Accepted Answer

A)   System.out.printf("%(5.2e", -123.0) ;
B)   System.out.printf("%5.2e", -123.0) ;
C)   System.out.printf("^5.2e", -123.0) ;
D)   System.out.printf("%5.2E", -123.0) ;E) A) and B)
F) A) and C)

Question 12

What is the meaning of x = 0; in Java?

Accepted Answer

A)   It checks whether x equals 0.
B)   It sets the variable x to zero.
C)   It defines a variable named x and initializes it with 0.
D)   It is a syntax error because x is not always 0.E) C) and D)
F) None of the above

Question 13

Assuming that the user inputs a value of 25 for the price and 10 for the discount rate in the following code snippet, what is the output?
Public static void main(String[] args) 
{
Scanner in = new Scanner(System.in) ;
System.out.print("Enter the price: ") ;
Double price = in.nextDouble() ;
System.out.print("Enter the discount rate: ") ;
Double discount = in.nextDouble() ;
System.out.println("The new price is " +
Price - price * (discount / 100.0) ) ;
}

Accepted Answer

A)   The new price is 25
B)   The new price is 15
C)   The new price is 22.5
D)   The new price is 20.0E) C) and D)
F) B) and D)

Question 14

Consider the following division statements:
I. 22 / 7
II. 22.0 / 7
III. 22 / 7.0
Which of the following is correct?

Accepted Answer

A)   All three statements will return an integer value.
B)   Only I will return an integer value.
C)   Only I, II will return an integer value.
D)   Only I and III will return an integer value.E) All of the above
F) B) and C)

Question 15

Which operator is used to concatenate two or more strings?

Accepted Answer

A)   +
B)   %
C)   &
D)   ^E) B) and C)
F) A) and B)

Question 16

What are the values of num1 and num2 after this snippet executes?
Double num1 = 4.20;
Double num2 = num1 * 10 + 5.0;

Accepted Answer

A)   num1 = 4.20 and num2 = 63.0
B)   num1 = 4.20 and num2 = 47.0
C)   num1 = 42.0 and num2 = 42.0
D)   num1 = 42.0 and num2 = 47.0E) None of the above
F) C) and D)

Question 17

What does the following statement sequence print?
Final String str = "Java";
Str += " is powerful";
System.out.println(str) ;

Accepted Answer

A)   Java is powerful
B)   Java + is powerful
C)   is powerful
D)   Nothing; compile-time errorE) B) and C)
F) None of the above

Question 18

Which one of the following reserved words is used in Java to represent a value without a fractional part?

Accepted Answer

A)   integer
B)   int
C)   Int
D)   FloatE) None of the above
F) A) and D)

Question 19

Which of the given statements generates the following output?
\"///

Accepted Answer

A)   System.out.println("\"///") ;
B)   System.out.println("\\\"///") ;
C)   System.out.println("\\\""//////") ;
D)   system.out.println("\"///") ;E) A) and B)
F) A) and C)

Question 20

Which of the given System.out.print statements generates the following output?
ABCDE"\

Accepted Answer

A)   System.out.println("ABCDE"\") ;
B)   System.out.println("ABCDE"") ;
C)   System.out.println("ABCDE"\) ;
D)   System.out.println("ABCDE"") ;E) A) and B)
F) None of the above

Exam 2: Fundamental Data Types

The first step in problem solving is

Correct Answer
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What are the values of num1 and num2 after this snippet executes? Double num1 = 4.20; Double num2 = num1 * 10 + 5.0;

Correct Answer
verified

Which of the following options is valid with reference to the code snippet? Public static void main(String[] args) { Double d = 45.326; Double r = d % 9.0; System.out.println(r) ; }

Correct Answer
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How do you compute the length of the string str?

Correct Answer
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Which one of the following statements gives the absolute value of the floating-point number x = -25.50?

Correct Answer
verified

Correct Answer
verified

What is wrong with the following code snippet? Int size = 42; Cost = 9.99; System.out.println("size = " + size) ; System.out.println(" cost = " + cost) ;

Correct Answer
verified

Given the definition final double PI = 3.14159; which of the following is the Java equivalent of the mathematical expression c = $\pi$ . radius²

Correct Answer
verified

Which one of the following reserved words is used in Java to represent a value without a fractional part?

Correct Answer
verified

What does the following statement sequence print? Final String str = "Java"; Str += " is powerful"; System.out.println(str) ;

Correct Answer
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At what point in the problem-solving process should one write pseudocode?

Correct Answer
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What is the meaning of x = 0; in Java?

Correct Answer
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Which of the given statements generates the following output? \\\"///

Correct Answer
verified

Correct Answer
verified

Which operator is used to concatenate two or more strings?

Correct Answer
verified

Which one of the following statements displays the output as (1.23e+02) ?

Correct Answer
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What is the output of the following code snippet? Int counter = 0; Counter++; System.out.print("The initial value of the counter is ") ; System.out.println(count) ;

Correct Answer
verified

Consider the following division statements: I. 22 / 7 II. 22.0 / 7 III. 22 / 7.0 Which of the following is correct?

Correct Answer
verified

Which of the given System.out.print statements generates the following output? ABCDE"\

Correct Answer
verified

Consider the following Java variable names: I. 1stInstance II. basicInt% III. empName_ IV. addressLine1 V. DISCOUNT Which of the following options is correct?

Correct Answer
verified

Exam 2: Fundamental Data Types

The first step in problem solving is

Correct AnswerverifiedShow Answer

What are the values of num1 and num2 after this snippet executes? Double num1 = 4.20; Double num2 = num1 * 10 + 5.0;

Correct AnswerverifiedShow Answer

Which of the following options is valid with reference to the code snippet? Public static void main(String[] args) { Double d = 45.326; Double r = d % 9.0; System.out.println(r) ; }

Correct AnswerverifiedShow Answer

How do you compute the length of the string str?

Correct AnswerverifiedShow Answer

Which one of the following statements gives the absolute value of the floating-point number x = -25.50?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is wrong with the following code snippet? Int size = 42; Cost = 9.99; System.out.println("size = " + size) ; System.out.println(" cost = " + cost) ;

Correct AnswerverifiedShow Answer

Given the definition final double PI = 3.14159; which of the following is the Java equivalent of the mathematical expression c = π\piπ . radius2

Correct AnswerverifiedShow Answer

Which one of the following reserved words is used in Java to represent a value without a fractional part?

Correct AnswerverifiedShow Answer

What does the following statement sequence print? Final String str = "Java"; Str += " is powerful"; System.out.println(str) ;

Correct AnswerverifiedShow Answer

At what point in the problem-solving process should one write pseudocode?

Correct AnswerverifiedShow Answer

What is the meaning of x = 0; in Java?

Correct AnswerverifiedShow Answer

Which of the given statements generates the following output? \\\"///

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which operator is used to concatenate two or more strings?

Correct AnswerverifiedShow Answer

Which one of the following statements displays the output as (1.23e+02) ?

Correct AnswerverifiedShow Answer

What is the output of the following code snippet? Int counter = 0; Counter++; System.out.print("The initial value of the counter is ") ; System.out.println(count) ;

Correct AnswerverifiedShow Answer

Consider the following division statements: I. 22 / 7 II. 22.0 / 7 III. 22 / 7.0 Which of the following is correct?

Correct AnswerverifiedShow Answer

Which of the given System.out.print statements generates the following output? ABCDE"\

Correct AnswerverifiedShow Answer

Consider the following Java variable names: I. 1stInstance II. basicInt% III. empName_ IV. addressLine1 V. DISCOUNT Which of the following options is correct?

Correct AnswerverifiedShow Answer

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Given the definition final double PI = 3.14159; which of the following is the Java equivalent of the mathematical expression c = $\pi$ . radius²

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