1. Which of the following is a value that is written into the code of a program?
ID: 3748082 • Letter: 1
Question
1. Which of the following is a value that is written into the code of a program?
a.
a literal
c.
an operator
b.
an assignment statement
d.
a variable
2. A Java program must have at least one of the following:
a.
a comment
b.
a class definition
c.
a System.out.println(); statement
d.
a variable declaration
3. Which of the following would contain the translated Java byte code for a program named Demo?
a.
Demo.java
c.
Demo.class
b.
Demo.code
d.
Demo.byte
4. Which of the following is a named storage location in the computer's memory?
a.
a literal
c.
a constant
b.
an operator
d.
a variable
5. Which of the following is not a valid Java comment?
a.
/** Comment one */
c.
// Comment three
b.
*/ Comment two /*
d.
/* Comment four */
6. To compile a program named First you would use which of the following commands?
a.
java First.java
c.
javac First.java
b.
javac First
d.
compile First.javac
7. A Java source file must be saved with the extension
a.
.java
c.
.src
b.
.javac
d.
.class
8. Which of the following is not a rule that must be followed when naming identifiers?
a.
After the first character, you may use the letters a-z, A-Z, an underscore, a dollar sign, or the digits 0-9.
b.
Identifiers can contain spaces.
c.
Uppercase and lowercase characters are distinct.
d.
The first character must be one of the letters a-z, A-Z, an underscore, or a dollar sign.
9. Character literals are enclosed in __________ and string literals are enclosed in __________.
a.
single quotes, double quotes
b.
double quotes, single quotes
c.
single quotes, single quotes
d.
double quotes, double quotes
10. Variables are classified according to their
a.
names
c.
locations
b.
values
d.
data types
11. What is the result of the following expression?
17 % 3 * 2 - 12 + 15
a.
105
b.
12
c.
7
d.
8
12. What is the result of the following expression?
10 + 5 * 3 - 20
a.
-5
b.
-50
c.
5
d.
25
13. In the following Java statement, what value is stored in the variable name?
String name = "John Doe";
a.
"name"
b.
the memory address where "John Doe" is located
c.
the memory address where name is located
d.
John Doe
14. What is the value of z after the following statements have been executed?
int x = 4, y = 33;
double z;
z = (double) (y / x);
a.
8.25
b.
4
c.
0
d.
8.0
15. What output will be displayed as a result of executing the following code?
int x = 5, y = 20;
x += 32;
y /= 4;
System.out.println("x = " + x + ", y = " + y);
a.
x = 160, y = 80
b.
x = 32, y = 4
c.
x = 37, y = 5
d.
x = 9, y = 52
16. Which of the following statements will correctly convert the data type, if x is a float and y is a double?
a.
x = float y;
c.
x = (float)y;
b.
x = <float>y;
d.
x = y;
17. Which of the following statements is invalid?
a.
double r = 9.4632E15;
c.
double r = 2.9X106;
b.
double r = 9.4632e15;
d.
double r = 326.75;
18. To print "Hello, world" on the monitor, which of the following Java statements should be used?
a.
System.out.println("Hello, world");
b.
System Print = "Hello, world";
c.
SystemOutPrintln('Hello, world');
d.
system.out.println(Hello, world);
19. The boolean data type may contain which of the following range of values?
a.
-128 to + 127
b.
true or false
c.
-2,147,483,648 to +2,147,483,647
d.
-32,768 to +32,767
20. Variables of the boolean data type are useful for
a.
evaluating conditions that are either true or false
b.
working with small integers
c.
working with very large integers
d.
evaluating scientific notation
21. What would be displayed as a result of executing the following code?
int x = 578;
System.out.print("There are " +
x + 5 + " " +
"hens in the hen house.");
a.
There are 583
hens in the hen house.
b.
There are 5785
hens in the hen house.
c.
There are x5 hens in the hen house.
d.
There are 5785 hens in the hen house.
22. What would be displayed as a result of executing the following code?
final int x = 22, y = 4;
y += x;
System.out.println("x = " + x + ", y = " + y)
a.
x = 22, y = 26
c.
x = 22, y = 88
b.
x = 22, y = 4
d.
Nothing. There is an error in the code.
23. What would be displayed as a result of executing the following code?
int x = 15, y = 20, z = 32;
x += 12;
y /= 6;
z -= 14;
System.out.println("x = " + x +
", y = " + y +
", z = " + z);
a.
x = 27, y = 3.333, z = 18
b.
x = 27, y = 2, z = 18
c.
x = 37, y = -14, z = 4
d.
x = 27, y = 3, z = 18
24. What is the value of z after the following code is executed?
int x = 5, y = 28;
float z;
z = (float) (y / x);
a.
5.6
b.
3.0
c.
5.0
d.
5.60
25. Which of the following statements correctly creates a Scanner object for keyboard input?
a.
Scanner kbd = new Scanner(System.keyboard);
b.
Scanner keyboard = new Scanner(System.in);
c.
Scanner keyboard(System.in);
d.
Keyboard scanner = new Keyboard(System.in);
26. Which Scanner class method reads a String?
a.
nextLine
c.
nextString
b.
charAt
d.
getLine
27. The primitive data types only allow a(n) __________ to hold a single value.
a.
class
c.
object
b.
literal
d.
variable
28. In Java, __________ must be declared before they can be used.
a.
variables
c.
key words
b.
literals
d.
comments
29. If the following Java statements are executed, what will be displayed?
System.out.println("The top three winners are ");
System.out.print("Jody, the Giant ");
System.out.print("Buffy, the Barbarian");
System.out.println("Adelle, the Alligator");
a.
The top three winners are
Jody, the Giant
Buffy, the Barbarian
Adelle, the Alligator
b.
The top three winners are Jody, the Giant Buffy, the BarbarianAdelle, and the Albino
c.
The top three winners are
Jody, the Giant Buffy, the BarbarianAdelle, the Alligator
d.
The top three winners are
Jody, the Giant
Buffy, the BarbarianAdelle, the Alligator
30. A value that is written into the code of a program is a(n) __________.
a.
literal
c.
variable
b.
assignment statement
d.
operator
31. When the + operator is used with strings, it is known as the
a.
assignment operator
c.
addition operator
b.
string concatenation operator
d.
combines assignment operator
32. What would be printed out as a result of the following code?
System.out.println("The quick brown fox" +
"jumped over the "
"slow moving hen.");
a.
The quick brown fox jumped over the slow moving hen.
b.
The quick brown fox jumped over the
slow moving hen.
c.
The quick brown fox
jumped over the
slow moving hen.
d.
Nothing - this is an error
33. Which of the following is not a rule that must be followed when naming identifiers?
a.
The first character must be one of the letters a-z, A-Z, and underscore or a dollar sign.
b.
Identifiers can contain spaces.
c.
Uppercase and lowercase characters are distinct.
d.
After the first character, you may use the letters a-z, A-Z, the underscore, a dollar sign, or digits 0-9.
34. Which of the following cannot be used as identifiers in Java?
a.
variable names
c.
key words
b.
class names
d.
objects
35. Which of the following is not a primitive data type?
a.
short
c.
float
b.
long
d.
string
36. Which of the following is valid?
a.
float y;
y = 54.9;
c.
float w;
w = 1.0f;
b.
float y;
double z;
z = 934.21;
y = z;
d.
float v;
v = 1.0
37. If x has been declared an int, which of the following statements is invalid?
a.
x = 0;
c.
x = 1,000;
b.
x = -59832;
d.
x = 592
38. To display the output on the next line, you can use the println method or use the __________ escape sequence in the print method.
a.
b.
c.
d.
39. Every Java application program must have
a.
a class named MAIN
c.
at least two data types
b.
a method named main
d.
integer variables
40. What will be displayed as a result of executing the following code?
int x = 6;
String msg = "I am enjoying this class.";
String msg1 = msg.toUpperCase();
String msg2 = msg.toLowerCase();
char ltr = msg.charAt(x);
int strSize = msg.length();
System.out.println(msg);
System.out.println(msg1);
System.out.println(msg2);
System.out.println("Character at index x = " + ltr);
System.out.println("msg has " + strSize + "characters.");
a.
I am enjoying this class.
I AM ENJOYING THIS CLASS.
i am enjoying this class.
Character at index x = e
msg has 24 characters.
c.
I am enjoying this class.
I AM ENJOYING THIS CLASS.
i am enjoying this class.
Character at index x = n
msg has 24 characters.
b.
I am enjoying this class.
I AM ENJOYING THIS CLASS.
i am enjoying this class.
Character at index x = e
msg has 25 characters.
d.
I am enjoying this class.
I AM ENJOYING THIS CLASS.
i am enjoying this class.
Character at index x = n
msg has 25characters.
41. What will be displayed as a result of executing the following code?
public class test
{
public static void main(String[] args)
{
int value1 = 9;
System.out.println(value1);
int value2 = 45;
System.out.println(value2);
System.out.println(value3);
value = 16;
}
}
a.
9
45
16
c.
9 45 16
b.
94516
d.
Nothing. Code will not compile
a.
a literal
c.
an operator
b.
an assignment statement
d.
a variable
Explanation / Answer
Note: According to Chegg policy, I am not allowed to answer more than 15 MCQ questions at a time. You can post the remaining questions again to get them answered
Ans1. a Literal
Ans2. a class definition
Ans3. Demo.class
Ans4. a variable
Ans5. */ Comment two /*
Ans6. javac First.java
Ans7. .java
Ans8. Identifiers can contain spaces.
Ans9. single quotes, double quotes
Ans10. data types
Ans 11. 7
Ans12. 5
Ans 13. the memory address where "John Doe" is located
Ans 14. 8.0
Ans 15. x = 37, y = 5
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