Question 1

What is the output of the following code snippet?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) No output due to syntax error 
A) 2 
B) 3 
C) 4 
D) No output due to syntax error

Question 2

What is the result of the following expression?
double d = 2.5 + 4 * -1.5 - (2.5 + 4) * -1.5;

Accepted Answer

A) 24.375 
B) 6.25 
C) 12.375 
D) 6 
A) 24.375 
B) 6.25 
C) 12.375 
D) 6

Question 3

Which statements about numeric types in Java are true?
I.There is more than one integer type
II.The data type float uses twice the storage of double
III.The numeric range of the Java integer type is related to powers of two

Accepted Answer

A) I, II 
B) I, III 
C) II, III 
D) I, II, III 
A) I, II 
B) I, III 
C) II, III 
D) I, II, III

Question 4

What is the output of the following code snippet?

Accepted Answer

A) Run-time error 
B) He 
C) Ho 
D) Hry 
A) Run-time error 
B) He 
C) Ho 
D) Hry

Question 5

What does the following statement sequence print if the user input is 123?

Accepted Answer

A) 579 
B) Compile-time error 
C) Run-time error 
D) 123456 
A) 579 
B) Compile-time error 
C) Run-time error 
D) 123456

Question 6

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. 
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.

Question 7

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) Float 
A) integer 
B) int 
C) Int 
D) Float

Question 8

Which of the following is the Java equivalent of the following mathematical expression?

Accepted Answer

A) p = 2 * Math.PI * (radius * 3); 
B) p = Math.PI * Math.pow(3,radius); 
C) p = 2 * Math.PI * Math.pow(radius, 3); 
D) p = 2 * Math.pow(Math.PI * radius, 3); 
A) p = 2 * Math.PI * (radius * 3); 
B) p = Math.PI * Math.pow(3,radius); 
C) p = 2 * Math.PI * Math.pow(radius, 3); 
D) p = 2 * Math.pow(Math.PI * radius, 3);

Question 9

Which one of the following types of statements is an instruction to set the value of a variable?

Accepted Answer

A) Update 
B) Declaration 
C) Assignment 
D) Initialization 
A) Update 
B) Declaration 
C) Assignment 
D) Initialization

Question 10

What is the output of the following code snippet?

Accepted Answer

A) 0 
B) 4 
C) 20 
D) There will be no output due to a run-time error. 
A) 0 
B) 4 
C) 20 
D) There will be no output due to a run-time error.

Question 11

What does the following statement sequence print if the user input is 123?

Accepted Answer

A) 579 
B) Compile-time error 
C) Run-time error 
D) 123456 
A) 579 
B) Compile-time error 
C) Run-time error 
D) 123456

Question 12

Which is a legal number literal of type int in Java?

Accepted Answer

A) 100,000 
B) 100.000 
C) 100_000 
D) 100000L 
A) 100,000 
B) 100.000 
C) 100_000 
D) 100000L

Question 13

What is the output of the following code snippet?

Accepted Answer

A) 36 
B) 36.525 
C) 37 
D) No output because the code snippet generates compilation errors 
A) 36 
B) 36.525 
C) 37 
D) No output because the code snippet generates compilation errors

Question 14

What is the value of Math.pow(2, 3)?

Accepted Answer

A) 5.0 
B) 6.0 
C) 8.0 
D) 9.0 
A) 5.0 
B) 6.0 
C) 8.0 
D) 9.0

Question 15

Which one of the following is an assignment statement?

Accepted Answer

A) int a = 20; 
B) a = 20; 
C) assign a = 20; 
D) assign 20 to a; 
A) int a = 20; 
B) a = 20; 
C) assign a = 20; 
D) assign 20 to a;

Question 16

Which is a correct representation of the given mathematical expression in Java?

Accepted Answer

A) a - b / 2 % 2 
B) a - b / 2 
C) a - (b / 2) / 2 
D) (a - b / 2) / 2 
A) a - b / 2 % 2 
B) a - b / 2 
C) a - (b / 2) / 2 
D) (a - b / 2) / 2

Question 17

What is the output of this code snippet? double average;
int grade1 =87;
int grade2 =94;
/ / system. out. print("The average is " +(grade1+grade2) / 2.0) ;
System.out.print("The average is " + average);

Accepted Answer

A)  Compile-time error 
B)  The average is 91.5 
C)  The average is 91.5
The average is 91.5 
D)  The average is 91.5
The average is 0.0 
A)  Compile-time error 
B)  The average is 91.5 
C)  The average is 91.5
The average is 91.5 
D)  The average is 91.5
The average is 0.0

Question 18

Which option represents the best choice for a variable name to represent the average grade of students on an exam?

Accepted Answer

A) averageGrade 
B) $averageGrade 
C) avg 
D) AveGd 
A) averageGrade 
B) $averageGrade 
C) avg 
D) AveGd

Question 19

A student's class average can be computed by dividing the number of marks they have earned by the number of marks possible.Assume the following variables have been declared as shown and given values elsewhere:
int marksEarned, marksPossible;
double classPercentage;
Which of the following statements will assign the correct percentage average to classPercentage? For example, if marksEarned is 725 and marksPossible is 1000, classPercentage should be assigned the value 72.5.

Accepted Answer

A) classPercentage = marksEarned / marksPossible * 100.0; 
B) classPercentage = 100 * marksEarned / marksPossible; 
C) classPercentage = (100.0 * marksEarned) / marksPossible; 
D) classPercentage = (100.0 + marksEarned) / marksPossible; 
A) classPercentage = marksEarned / marksPossible * 100.0; 
B) classPercentage = 100 * marksEarned / marksPossible; 
C) classPercentage = (100.0 * marksEarned) / marksPossible; 
D) classPercentage = (100.0 + marksEarned) / marksPossible;

Question 20

Which of the following statements about constants is correct?

Accepted Answer

A) Constants are written using capital letters because the compiler ignores constants declared in small letters. 
B) The data stored inside a constant can be changed using an assignment statement. 
C) You can make a variable constant by using the final reserved word when declaring it. 
D) Constant variables can only be changed through the Math library. 
A) Constants are written using capital letters because the compiler ignores constants declared in small letters. 
B) The data stored inside a constant can be changed using an assignment statement. 
C) You can make a variable constant by using the final reserved word when declaring it. 
D) Constant variables can only be changed through the Math library.

Exam 4: Fundamental Data Types

What is the output of the following code snippet?

What is the result of the following expression? double d = 2.5 + 4 * -1.5 - (2.5 + 4) * -1.5;

Which statements about numeric types in Java are true? I.There is more than one integer type II.The data type float uses twice the storage of double III.The numeric range of the Java integer type is related to powers of two

What is the output of the following code snippet?

What does the following statement sequence print if the user input is 123?

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

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

Which of the following is the Java equivalent of the following mathematical expression?

Which one of the following types of statements is an instruction to set the value of a variable?

What is the output of the following code snippet?

What does the following statement sequence print if the user input is 123?

Which is a legal number literal of type int in Java?

What is the output of the following code snippet?

What is the value of Math.pow(2, 3)?

Which one of the following is an assignment statement?

Which is a correct representation of the given mathematical expression in Java?

What is the output of this code snippet? double average; int grade1 =87; int grade2 =94; / / system. out. print("The average is " +(grade1+grade2) / 2.0) ; System.out.print("The average is " + average);

Which option represents the best choice for a variable name to represent the average grade of students on an exam?

Which of the following statements about constants is correct?

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