Deck 1: Getting Started

Question 1

Java began as a language for home appliances.

Answer 1

True

Question 2

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

Answer 2

True

Question 3

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;

Answer 3

D

Question 4

To mark a block comment for inclusion in the Javadoc documentation,the block must be delimited by:

A)/** */
B)*/* */
C)**/ /*
D)**/ */

Question 5

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 6

Java is an interpreted language.

Question 7

The escape sequence the represents the new-line character is:

A)\r
B)\t
C)\n
D)\\

Question 8

In Java,a block comment is delimited by:

A)*/ /*
B)/* /*
C)/* */
D)*/ */

Question 9

What is the Java expression for 27xy?

A)27 + x * y)
B)27 * x + y)
C)27 * x * y
D)27x * y

Question 10

Which operator is used to concatenate two strings?

A)+
B)-
C)*
D)/

Question 11

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 12

Which operator returns the remainder of integer division?

A)%
B)/
C)*
D)none of the above

Question 13

What is the value of 7.52e-5?

A)752000.0
B)0.0000752
C)0.000752
D)0.00752

Question 14

Identify the invalid Java identifier.

A)1Week
B)Week1
C)amountDue
D)amount_due

Question 15

The value of the expression int)27.6 evaluates to:

A)28
B)27
C)26
D)None of the above.

Question 16

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 17

In Java,the equal sign is used as the ___________ operator.

A)increment
B)decrement
C)assignment
D)negation

Question 18

Applets were designed to run as stand-alone applications.

Question 19

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.charAt10);

A)w
B)h
C)i
D)None of the above

Question 20

In Java,source code is compiled into object code called ______________.

A)Bit-code
B)Class code
C)Method code
D)Byte-code

Question 21

What is the syntax and semantics of a programming language?

Question 22

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

Question 23

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

Question 24

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 25

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

Question 26

Two kinds of Java programs are applications and applets.Define and discuss each.

Question 27

The result of integer division is truncated in Java.

Question 28

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

Question 29

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

Question 30

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 31

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

Question 32

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

Question 33

Java uses the ASCII character set.

Question 34

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

Question 35

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

Question 36

What is byte-code? What is its importance?

Question 37

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

Question 38

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

Question 39

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

Question 40

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

Question 41

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

Question 42

Why is using named constants a good programming practice?

Question 43

How are line comments and block comments used?

Question 44

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

Question 45

What is the output of the following Java statements?
//String method examples
String str = "Java Programming!";
System.out.printlnstr.equals"Java Programming!"));
System.out.printlnstr.toLowerCase));
System.out.printlnstr.toUpperCase));
System.out.printlnstr.substring5,8));
System.out.printlnstr.lastIndexOf"m"));