Programming Fundamental quiz 1-4
The do-while loop must be terminated with a semicolon
True
The if/else statement will execute one group of statements if its boolean expression is true or another group if its boolean expression is false.
True
The while loop has two important parts: (1) a boolean expression that is tested for a true or false value, and (2) a statement or block of statements that is repeated as long as the expression is true.
True
Two general categories of methods are void methods and value returning methods.
True
When the continue statement is encountered in a loop, all the statements in the body of the loop that appear after it are ignored, and the loop prepares for the next iteration
True
In Java, ________ must be declared before they can be used.
Variables
If you attempt to use a local variable before it has been given a value:
a compiler error will occur.
A computer program is
a set of instructions that enable the computer to solve a problem or perform a task
RAM is usually
a volatile type of memory, used only for temporary storage
This is a control structure that causes a statement or group of statements to repeat
loop
Each different type of CPU has its own
machine language
Software refers to
programs
Given the declaration double r;, which of the following statements is invalid?
r = 2.9X106
Byte code instructions are
read and interpreted by the JVM
Which of the following would be a valid method call for the following method? public static void showProduct (int num1, double num2) { int product; product = num1 * (int) num2; System.out.println("The product is " + product); }
showProduct(10, 4.5);
Character literals are enclosed in ________; string literals are enclosed in ________.
single quotes; double quotes
Another term for programs is:
software
In an if/else statement, if the boolean expression is false,
the statement or block following the else is executed
The purpose of validating the results of the program is
to determine whether the program solves the original problem
The boolean data type may contain values in the following range of values
true or false
The expression tested by an if statement must evaluate to:
true or false
Which of the following are pre-test loops?
while, for
Key words are
words that have a special meaning in the programming language
Which of the following expressions will determine whether x is less than or equal to y?
x <= y
If x has been declared an int, which of the following statements is invalid?
x = 1,000
What will be the value of x after the following code is executed? int x = 75; int y = 60; if (x > y) x = x - y;
15
What is the value of x after the following code has been executed? int x = 75; int y = 90; if (x ! = y) x += y;
165
What would be the value of x after the following statements were executed? int x = 10; switch (x) { case 10: x += 15; case 12: x -= 5; break; default : x *= 3; }
20
How many times will the following do-while loop be executed? int x = 11; do { x += 20; } while (x <= 1000);
5
What will be printed after the following code is executed? for (int number = 5; number <= 15; number +=3 System.out.print (number + ", ");
5, 8, 11, 14,
You should always document a method by writing comments that appear:
Just before the method's definition.
Suppose you are at an operating system command line, and you are going to use the following command to compile a program: javac MyClass.java Before entering the command, you must
Make sure you are in the same directory or folder where MyClass.java is located
This part of a method is a collection of statements that are performed when the method is executed.
Method body
The switch statement is a:
Multiple alternative decision structure
The lifetime of a method's local variable is:
Only while the method is executing.
A special variable that holds a value being passed into a method is called what?
Parameter
This type of loop will always be executed at least once.
Post-test loop
This type of operator determines whether a specific relationship exists between two values
Relational
Syntax is
Rules that must be followed when writing a program.
Before entering a loop to compute a running total, the program should first do this.
Set the accumulator where the total will be kept to an initial value, usually zero
The term ________ typically refers to the device that displays console output.
Standard output device
Java was developed by
Sun Microsystems
A program is a sequence of instructions stored in:
The computer's memory
The header of a value-returning method must specify this.
The data type of the return value
In the following Java statement what value is stored in the variable name? String name = "John Doe";
The memory address where "John Doe" is located
A parameter variable's scope is
The method in which the parameter is declared.
When you pass an argument to a method, be sure that the argument's data type is compatible with:
The parameter variable's data type.
Application software refers to:
The programs that make the computer useful to the user.
If the following Java statements are executed, what will be displayed? System.out.println("The top three winners are\n"); System.out.print("Jody, the Giant\n"); System.out.print("Buffy, the Barbarian"); System.out.println("Adelle, the Alligator");
The top three winners are Jody, the Giant Buffy, the BarbarianAdelle, the Alligator
What will be returned from the following method? public static int methodA() { double a = 8.5 + 9.5; return a ; }
This is an error.
What will be the value of x after the following code is executed? int x = 10, y = 20; while ( y < 100) { x += y; }
This is an infinite loop.
A variable's scope is the part of the program that has access to the variable.
True
Although the dollar sign is a legal identifier character, you should not use it because it is normally used for special purposes.
True
If the compiler encounters a statement that uses a variable before the variable is declared, an error will result
True
In a switch statement, each of the case values must be unique.
True
Methods are commonly used to break a problem into small manageable pieces
True
Named constants are initialized with a value, that value cannot be changed during the execution of the program.
True
Which of the following is the correct boolean expression to test for: int x being a value between, but not including, 500 and 650, or int y not equal to 1000?
((x > 500 && x < 650) || (y != 1000))
Which one of the following is the not equal operator?
!=
What would be the value of discountRate after the following statements are executed?
0.0
How many times will the following do-while loop be executed? int x = 11; do { x += 20; } while (x > 1000);
1
What will be the value of bonus after the following code is executed? int bonus, sales = 10000 ; if (sales < 5000) bonus = 200; else if (sales < 7500) bonus = 500; else if (sales < 10000) bonus = 750; else if (sales < 20000) bonus = 1000; else bonus = 1250;
1000
How many times will the following for loop be executed? for(int count=10; count<21; count++) System.out.println("Java is great!!!");
11
What will be the value of ans after the following code has been executed? int x = 10; int y = 65; if (x > = y) ans = x + y;
120
In a general sense, a method is
A collection of statements that performs a specific task
A runtime error is usually the result of:
A logical error.
Every Java application program must have
A method named main.
When an object, such as a String, is passed as an argument, it is:
Actually a reference to the object that is passed.
Breaking a program down into small manageable methods:
All of these.
Local variables
All of these.
The major components of a typical computer system consist of
All of these: The CPU. Input/output devices. Main memory. Secondary storage devices.
Each repetition of a loop is known as what?
An iteration
A Java program must have at least one of these
Class definition
In Java, it is standard practice to capitalize the first letter of
Class names
If method A calls method B, and method B calls method C, and method C calls method D, when method D finishes, what happens?
Control is returned to method C
The process of breaking a problem down into smaller pieces is sometimes called
Divide and conquer.
A byte is a collection of:
Eight bits
A Java program will not compile unless it contains the correct line numbers...
False
All Java statements end with semicolons
False
Assuming that pay has been declared a double, the following statement is valid..pay = 2,583.44;
False
In Java the variable named total is the same as the variable named Total.
False
In a for statement, the control variable can only be incremented
False
Java is a case-insensitive language.
False
When the break statement is encountered in a loop, all the statements in the body of the loop that appear after it are ignored, and the loop prepares for the next iteration.
False
If a loop does not contain within itself a way to terminate, it is called a(n):
Infinite loop.
When an argument is passed to a method,
Its value is copied into the method's parameter variable.
A for loop normally performs which of these steps?
all of the above
What will be the values of ans, x, and y after the following statements are executed? int ans = 35, x = 50, y = 50; if (x >= y) { ans = x + 10; x -= y; } else { ans = y + 10; y += x; }
ans = 60, x = 0, y = 50
Because Java byte code is the same on all computers, compiled Java programs
are highly portable.
Values that are sent into a method are called ________.
arguments
Computer programming is
both of these An art. A science.
An operating system can be categorized according to
both of these: The number of users they can accommodate. The number of tasks they can perform at one time.
A block of code is enclosed in a set of:
braces { }
A loop that repeats a specific number of times is known as a(n):
count-controlled loop
This type of loop is ideal in situations where you always want the loop to iterate at least once.
do-while loop
A Boolean expression is one that is either
either true or false
This type of loop is ideal in situations where the exact number of iterations is known.
for loop
The ________ statement is used to make simple decisions in Java.
if
If chr is a character variable, which of the following if statements is written correctly?
if (chr == 'a')
The computer can do such a wide variety of tasks because
it can be programmed
