Deck 1: Getting Started

Question 1

In Java,the equal sign is used as the ___________ operator.
(a)increment
(b)decrement
(c)assignment
(d)negation

Answer 1

C

Question 2

Which operator returns the remainder of integer division?
(a)%
(b)/
(c)*
(d)none of the above

Answer 2

A

Question 3

Applets were designed to run as stand-alone applications.

Answer 3

False

Question 4

What is the value of the variable amountDue?
Double price = 2.50;
Double quantity = 5;
Double amountDue = 0;
AmountDue = price * quantity;
(a)12
(b)12.25
(c)12.5
(d)13

Question 5

The Java programming language allows you to concatenate two strings using the plus sign.

Question 6

Identify the invalid Java identifier.
(a)1Week
(b)Week1
(c)amountDue
(d)amount_due

Question 7

In Java,source code is compiled into object code called ______________.
(a)Bit-code
(b)Class code
(c)Method code
(d)Byte-code

Question 8

To mark a block comment for inclusion in the Javadoc documentation,the block must be delimited by:
(a)/** */
(b)*/* */
(c)**/ /*
(d)**/ */

Question 9

Which operator is used to concatenate two strings?
(a)+
(b)-
(c)*
(d)/

Question 10

What is the Java expression for 4a² + 2b * c?
(a)(4 * a)+ (2 * b)* c
(b)(4 * a * a)+ ((2 * b)* c)
(c)((4 * a * a)+ (2 * b))* c
(d)(4 + a * a)+ ((2 + b)* c)

Question 11

What is the value of the variable c in the statements that follow?
String phrase = "Make hay while the sun is shining.";
Char c = phrase.charAt(10);
(a)w
(b)h
(c)i
(d)None of the above

Question 12

The hardest kind of error to detect in a computer program is a:
(a)Syntax error
(b)Run-time error
(c)Logic error
(d)All of the above

Question 13

What is the Java expression for 27xy?
(a)27 + (x * y)
(b)27 * (x + y)
(c)27 * x * y
(d)27x * y

Question 14

The escape sequence the represents the new-line character is:
(a)\r
(b)\t
(c)\n
(d)\\

Question 15

In Java,a block comment is delimited by:
(a)*/ /*
(b)/* /*
(c)/* */
(d)*/ */

Question 16

Java is an object-oriented programming language.An object-oriented language
(a)Uses structured programming.
(b)Views a program as consisting of objects which communicate through interactions.
(c)Functionally breaks down problems into smaller,more manageable problems.
(d)All of the above.

Question 17

The syntax that declares a Java named constant named SALES_TAX is:
(a)double SALES_TAX = 7.50;
(b)public double SALES_TAX = 7.50;
(c)public static double SALES_TAX = 7.50;
(d)public static final double SALES_TAX = 7.50;

Question 18

The value of the expression (int)27.6 evaluates to:
(a)28
(b)27
(c)26
(d)None of the above.

Question 19

What is the value of 7.52e-5?
(a)752000.0
(b)0.0000752
(c)0.000752
(d)0.00752

Question 20

Java began as a language for home appliances.

Question 21

There are two kinds of Java programs,applications and applets.Define and discuss each.

Question 22

A variable of type boolean can be explicitly converted to that of type int.

Question 23

Objects of type String are strings of characters that are written within single quotes.

Question 24

How is the % (modulus)operator used? What is the common use of the modulus operator?

Question 25

What is byte-code? What is its importance?

Question 26

Explain the difference between an implicit type cast and an explicit type cast.

Question 27

An advantage of using the Unicode character set is that it easily handles languages other than English.

Question 28

What steps must the programmer take to create an executable Java program?

Question 29

What is the syntax and semantics of a programming language?

Question 30

Java uses the ASCII character set.

Question 31

In Java,Strings are immutable objects.Immutable objects can be changed.

Question 32

Define high-level languages,machine language and low-level language.Explain how the languages correspond to one another.

Question 33

Define the terms class,object,method and method call.

Question 34

Java is an interpreted language.

Question 35

List the primitive data types Java supports.Indicate the kind of values each type can store.

Question 36

The modulus operator,%,returns the remainder of integer division.

Question 37

Java does not require that a variable be declared before it is used within a program.

Question 38

The result of integer division is truncated in Java.

Question 39

What are the values of the variables a,b,c,and d after the execution of the following expressions?
Int a = 3;
Int b = 12;
Int c = 6;
Int d = 1;
D = d * a;
C = c + 2 * a;
D = d - b / c;
C = c * b % c;
B = b / 2;

Question 40

What is the output produced by the following lines of code?
int value1 = 3;
int value2 = 4;
int result = 0;
result = value1++ * value2--;
System.out.println("Post increment/decrement: " + result);
result = ++value1 * --value2;
System.out.println("Pre increment/decrement: " + result);

Question 41

Why is using named constants a good programming practice?

Question 42

What does the String method trim()do? Give an example of its use.

Question 43

Write a Java statement to determine the length of a string variable called input.Store the result in an integer variable called strLength.

Question 44

Write a Java statement to access the 7^th character in the String variable myString and place it in the char variable c.

Question 45

How are line comments and block comments used?

Question 46

What is the output of the following Java statements?
//String method examples
String str = "Java Programming!";
System.out.println(str.equals("Java Programming!"));
System.out.println(str.toLowerCase());
System.out.println(str.toUpperCase());
System.out.println(str.substring(5,8));
System.out.println(str.lastIndexOf("m"));