Midterm Exam

Question 1

When you create a block, you must place multiple statements within it.

Answer 1

False

Question 2

Which of the following is NOT a component of a variable declaration statement?

a.
variable name

b.
ending semicolon

c.
data type identifier

d.
symbolic constant

Answer 2

symbolic constant

Question 3

Although not a requirement, it is Java standard that class identifiers begin with an uppercase letter and use other uppercase letters to improve readability.

Answer 3

True

Question 4

The executable file that executes a Java bytecode into a machine code:
Select one:

a.
javax

b.
java

c.
javaw

d.
javah

e.
appletviewer

f.
javac

Answer 4

java

Question 5

Modulus operator, %, can be applied to which of these?

Select one:

a.
Both Integers and floating

b.
None of the mentioned

c.
Integers

d.
Floating

Answer 5

Both Integers and floating

Question 6

A ____ is a named memory location that you can use to store a value
a.
primitive

b.
reference

c.
variable

d.
cast

Answer 6

variable

Question 7

Java methods must be located inside a class.

Answer 7

True

Question 8

Although not required, it is common procedure to align the keyword if with the keyword else.

Answer 8

True

Question 9

Which of these is returned by greater than,

Answer 9

Boolean

Question 10

The literals 5, 23, -2, and 900 are integer literals in Java and are of automatic type long.

Answer 10

False’.

Question 11

Which of these statement is correct?
Select one:

a.
true and false are non numeric values.

b.
true is any non zero value and false is 0.

c.
true and false are numeric values 1 and 0.

d.
true and false are numeric values 0 and 1.

Answer 11

true and false are non numeric values.

Question 12

What is the operand of arithmetic operators?
Select one:

a.
Numeric

b.
Both Numeric & Characters

c.
Characters

d.
Boolean

Answer 12

Both Numeric & Characters

Question 13

All Java statements are terminated with a semicolon.

Answer 13

True

Question 14

A loop that never ends is called a(n) ____ loop.

a.
while

b.
for

c.
infinite

d.
definite

Answer 14

infinite

Question 15

Which of these is necessary condition for automatic type conversion in Java?
Select one:

a.
None of the mentioned

b.
The destination type is smaller than source type.

c.
The destination type is larger than source type.

d.
The destination type can be larger or smaller than source type.

Answer 15

The destination type is larger than source type.

Question 16

____ occurs when both of the operands are integers.
Unlike assignment

b.
Integer division

c.
Data modeling

d.
Type cast

Answer 16

Integer division

Question 17

Classes and methods are always defined in blocks of code enclosed in {}.

Answer 17

True

Question 18

In the switch structure, break is followed by one of the possible values for the test expression and a colon.

Answer 18

False

Question 19

A variable can hold more than one value at a time.

Answer 19

False’.

Question 20

When you place a block within an if statement, it is crucial to place the ____ correctly.

a.
commas

b.
periods

c.
curly braces

d.
angle brackets

Answer 20

curly braces

Question 21

When an expression containing a ____ is part of an if statement, the assignment is illegal.

a.
Boolean value

b.
double equal sign

c.
single equal sign

d.
greater than sign

Answer 21

single equal sign

Question 22

Local variables are variables that are declared inside the class but outside the method.

Answer 22

False’.

Question 23

A compiler ignores whitespace (that is, any combination of nonprinting characters) between words and lines.

Answer 23

‘True’.

Question 24

true && false || 9 < 4 + 5

Answer 24

False’.

Question 25

In Java, when a numeric variable is concatenated to a String using the ____, the entire expression becomes a String.

a.
plus sign

b.
equal sign

c.
concatenate statement

d.
string statement

Answer 25

plus sign

Question 26

The ____ operator is always evaluated before the OR operator.

a.
AND

b.
Assignment

c.
Logical

d.
Conditional

Answer 26

AND

Question 27

JDK stands for Java _____ Kit.
Select one:

a.
Distinct

b.
Distributed

c.
Design

d.
Development

Answer 27

Development

Question 28

Why is the main() method special in a Java program?
Select one:

a.
Every class must have a main() method.

b.
The main() method must be the only static method in a program.

c.
Only the main() method may create objects.

d.
It is where the Java interpreter starts the whole program running.

Answer 28

It is where the Java interpreter starts the whole program running.

Question 29

The compiler does not take indentation into account when compiling code, but consistent indentation can help readers understand a program’s ____.

a.
decision

b.
machine language

c.
logic

d.
class

Answer 29

logic

Question 30

What is the size of a double variable in Java?
Select one:

a.
2 bytes

b.
8 bytes

c.
It depends on the compiler setting

d.
It depends on the operating system

e.
4 bytes

Answer 30

8 bytes

Question 31

A logical structure called a(n) ____ structure is when one step follows another unconditionally.

a.
decision

b.
straight

c.
unconditional

d.
sequence

Answer 31

sequence

Question 32

What is the output of this program?
 class conversion {
 public static void main(String args[]) 
 { 
 double a = 295.04;
 int b = 300;
 byte c = (byte) a;
 byte d = (byte) b;
 System.out.println(c + " " + d);
 } 
 }

Select one:

a.
39 44

b.
295 300

c.
38 43

d.
295.04 300

Answer 32

295 300

Question 33

IDE stands for _____ Development Environment.
Select one:

a.
Integrated

b.
Integral

c.
Instantiated

d.
Interface

Answer 33

Integrated

Question 34

The extension used for a java source file is .class.

Answer 34

False’.

Question 35

Short is an object data type in Java.

Answer 35

‘True’.

Question 36

You use the NOT operator, which is written as the exclamation point (!), to negate the result of any Boolean expression.

Answer 36

True’.

Question 37

The byte and short data types occupy less memory and can hold only smaller values.

Answer 37

‘True’.

Question 38

API stands for _____ Programming Interface.
Select one:

a.
Application

b.
Asynchronous

c.
Amplified

d.
Advanced

Answer 38

Application

Question 39

The kinds of loops based on behavior:
Select one:

a.
Linear, Matrix, Multi-Dimensional

b.
Class, Method, Statement

c.
while, do while, for

d.
Counting, Sentinel-Controlled, Result-Controlled

Answer 39

Counting, Sentinel-Controlled, Result-Controlled

Question 40

You use the ____ data type to hold any single character.

a.
char

b.
byte

c.
single

d.
float

Answer 40

char

Question 41

You can use the ____, which is written as ||, if you want some action to occur when at least one of two conditions is true.

a.
switch statement

b.
logical AND operator

c.
conditional OR operator

d.
range check

Answer 41

conditional OR operator

Question 42

In Java, you use variables of type ____ to store integers, or whole numbers.

a.
num

b.
int

c.
double

d.
var

Answer 42

int

Question 43

Int data types represents _______ bits.

a.
8

b.
32

c.
64

d.
16

Answer 43

32

Question 44

The ____ operator is written as the exclamation point ( ! ).

a.
NOT

b.
assignment

c.
equality

d.
AND

Answer 44

NOT

Question 45

The kinds of loops based on Java syntax:
Select one:

a.
Class, Method, Statement

b.
Counting, Sentinel-Controlled, Result-Controlled

c.
while, do while, for

d.
Linear, Matrix, Multi-Dimensional

Answer 45

while, do while, for

Question 46

You can leave out the ____ statements in a switch structure.

a.
if

b.
case

c.
break

d.
switch

Answer 46

break

Question 47

Multiplication, division, and remainder always take place after addition or subtraction in an expression.

Answer 47

‘False’.

Question 48

When you use nested if statements, you must pay careful attention to placement of any else clauses.

Answer 48

‘True’.

Question 49

true, false, null, goto, try and catch are part of the Java reserved words.

Answer 49

‘True’.

Question 50

What is the output of this program?
 class increment {
 public static void main(String args[]) 
 { 
 int g = 3;
 System.out.print(++g * 8);
 } 
 }

Select one:

a.
25

b.
33

c.
32

d.
24

Answer 50

32

Question 51

When you block statements, you must remember that any ____ you declare within a block is local to that block

a.
expression

b.
method

c.
variable

d.
decision

Answer 51

variable

Question 52

Which of these operators can skip evaluating right hand operand?
Select one:

a.
!

b.
|

c.
&&

d.
&

Answer 52

&&

Question 53

Statements in which an if structure is contained inside another if structure are commonly called ____ if statements.

a.
inside

b.
logical

c.
blocked

d.
nested

Answer 53

nested

Question 54

Which of these statement is incorrect?
Select one:

a.
it is possible to create a nested switch statements.

b.
two case constants in the same switch can have identical values.

c.
switch statement can only test for equality, whereas if statement can evaluate any type of boolean expression.

d.
switch statement is more efficient than a set of nested ifs.

Answer 54

two case constants in the same switch can have identical values.

Question 55

Which of these have highest precedence?
Select one:

a.
*

b.
()

c.
»

d.
++

Answer 55

( )

Question 56

____ refers to the order in which values are used with operators.

a.
Initialization

b.
Associativity

c.
Declaration

d.
Floating

Answer 56

Associativity

Question 57

Just as you can block statements that depend on an if, you can also block statements that depend on a(n) ____.

a.
operator

b.
Boolean expression

c.
else

d.
constant

Answer 57

else

Question 58

What sort of thing is “Nothing New” as in the following: String str = “Nothing New”;
Select one:

a.
A String shortcut

b.
An optimized String

c.
A quoted String

d.
A String literal

Answer 58

A String literal

Question 59

What will the output of the following code segment be?
int a = 1, b = 2;

System.out.println(++a+”,”+b++);

a.
2,2

b.
3,3

c.
2,3

d.
1,2

Answer 59

2,2

Question 60

What is the keyword “final” used for in Java?

a.
identify a string

b.
identify an integer

c.
identify a constant

d.
identify a final answer

Answer 60

identify a constant

Question 61

logic errors are easily identified when a program is compiled

Answer 61

False

Question 62

The kinds of loops based on dimension:
Select one:

a.
while, do while, for

b.
Class, Method, Statement

c.
Counting, Sentinel-Controlled, Result-Controlled

d.
Linear, Matrix, Multi-Dimensional

Answer 62

Linear, Matrix, Multi-Dimensional

Question 63

A ____ is a structure that allows repeated execution of a block of statements.

a.
loop

b.
loop control

c.
Boolean expression

d.
body

Answer 63

loop

Question 64

An expression involving byte, int, and whole literal numbers is promoted to which of these?
Select one:

a.
int

b.
byte

c.
float

d.
long

Answer 64

int

Question 65

Identify what java language component are the following:
helloWorld
HELLO_WORLD
hello.world
helloWorld()
HelloWorld

Answer 65

helloWorld
variable

HELLO_WORLD
constant

hello.world
package

helloWorld()
method

HelloWorld
class

Question 66

The AND operator is written as two ____.

a.
asterisks

b.
equal signs

c.
plus signs

d.
ampersands

Answer 66

ampersands

Question 67

Which are legal declarations? (Choose all that apply)

a.
short[5] x2;

b.
short [] y;

c.
[5];

d.
short [] y2

e.
short x [];

f.
short z2 [5];

Answer 67

short x [];, short [] y;, [5];

Question 68

A Java identifier can contain only letters, digits, ampersands, or number signs.

Answer 68

‘False’.

Question 69

An expression involving byte, int, and whole literal numbers is promoted to which of these?
Select one:

a.
int

b.
byte

c.
float

d.
long

Answer 69

int

Question 70

What is the output of this program?
 class Output {
 public static void main(String args[]) 
 { 
 int a = 1;
 int b = 2;
 int c;
 int d;
 c = ++b;
 d = a++;
 c++;
 b++;
 \++a;
 System.out.println(a + " " + b " " + c);
 } 
 }
Select one:

a.
3 2 3

b.
2 3 4

c.
3 4 4

d.
3 2 4

Answer 70

3 4 4

Question 71

What is the output of this program?
 class increment {
 public static void main(String args[]) 
 { 
 int g = 3;
 System.out.print(++g * 8);
 } 
 }

Select one:

a.
25

b.
33

c.
32

d.
24

Answer 71

32

Question 72

What is the output of this program?
 class jump_statments {
 public static void main(String args[]) 
 { 
 int x = 2;
 int y = 0;
 for ( ; y < 10; ++y) {
 if (y % x == 0) 
 continue; 
 else if (y == 8)
 break;
 else
 System.out.print(y + " ");
 }
 } 
 }
Select one:

a.
1 3 5 7 9

b.
2 4 6 8

c.
1 3 5 7

d.
1 2 3 4 5 6 7 8 9

Answer 72

1 3 5 7 9

Question 73

What is the output of this program?
 class operators {
 public static void main(String args[]) 
 { 
 int x = 8;
 System.out.println(++x * 3 + " " + x);
 } 
 }
Select one:

a.
27 9

b.
27 8

c.
24 8

d.
24 9

Answer 73

27 9

Question 74

Java supports only 2 kinds of comment styles, single-line and multi-line.

Answer 74

False

Question 75

A(n) ____ variable can hold only one of two values: true or false.

a.
true

b.
boolean

c.
comparison

d.
integer

Answer 75

boolean

Question 76

Which of the following will output -4.0
Select one:

a.
System.out.println(Math.min(-4.7));

b.
System.out.println(Math.ceil(-4.7));

c.
System.out.println(Math.floor(-4.7));

d.
System.out.println(Math.round(-4.7));

Answer 76

System.out.println(Math.ceil(-4.7));

Question 77

Determine if the following names are valid or in invalid:
booleaN
object
compute-Tax
0ThreeTwo
Class

Answer 77

booleaN → valid, 
object → valid,
 compute-Tax → invalid, 
0ThreeTwo → invalid, 
Class → valid

Question 78

You are limited to declaring a maximum of three variables in a single statement.

Answer 78

‘False’.

Question 79

You use a unary minus sign preceding a value to make the value ____.

a.
constant

b.
positive

c.
negative

d.
valid

Answer 79

negative

Question 80

Keywords can be used as a name of a variable, method of class as long as they start with capital letter.

Answer 80

‘True’

Question 81

A ____ checks a value, and based on the result performs one of two actions.

a.
decision structure
block structure

b.
sequence structure

c.
short-circuit structure

Answer 81

decision structure

block structure

Question 82

When you want to increase a variable’s value by exactly 1, use the ____.

a.
binary operators

b.
prefix increment operator

c.
accumulating operator

d.
power statement

Answer 82

prefix increment operator

Question 83

The simplest statement you can use to make a decision is the ____ statement.

a.
if

b.
Boolean

c.
this

d.
true false

Answer 83

if

Question 84

Which of the following loops will execute the body of loop even when condition controlling the loop is initially false?
Select one:

a.
while

b.
for

c.
None of the mentioned

d.
do-while

Answer 84

do-while

Question 85

Java is case insensitive.

Answer 85

‘False’.

Question 86

The ____ statement is useful when you need to test a single variable against a series of exact integer, character, or string values.

a.
switch

b.
else

c.
if

d.
break

Answer 86

switch

Question 87

The executable file that compiles a Java source code into a byte code:
Select one:

a.
java

b.
javah

c.
appletviewer

d.
javac

e.
javaw

f.
javax

Answer 87

javac

Question 88

The ____ statement is useful when you need to test a single variable against a series of exact integer, character, or string values.

a.
switch

b.
else

c.
if

d.
break

Answer 88

switch

Question 89

Decide what should be the data type for the following literals:

The monthly salary of an employee without cents

The name of a person

The flag that either turns on or off

The blood type of a person

The account balance of a persons bank savings

Answer 89

The monthly salary of an employee without cents → int,

The name of a person → String,

The flag that either turns on or off → boolean,

The blood type of a person → String,

The account balance of a persons bank savings → double

Question 90

Evaluate the following conditions whether it yields a true or a false:
100+18%81-34+563%12>=66/32-11&&335%7!=10*44-8

2334+7%21/6==125%6/3||23*5%9+1<16

!true&&false||!true||!false&&23%34+12<10

34+7>23||23<7+43

10%345%7-208/32<=49/3+7%6&&23+9-8*5%12>18

Answer 90

100+18%81-34+563%12>=66/32-11&&335%7!=10*44-8 → true,

2334+7%21/6==125%6/3||23*5%9+1<16 → true,

!true&&false||!true||!false&&23%34+12<10 → false,

34+7>23||23<7+43 → false,

10%345%7-208/32<=49/3+7%6&&23+9-8*5%12>18 → true

Question 91

Identify what type of operators are the following:

*
<=
?:
||
%

Answer 91

* → arithmetic, 
<= → relational,
 ?: → ternary,
 || → logical,
 % → arithmetic

Question 92

The int data type is the most commonly used integer type.

Answer 92

True’.

Question 93

What is the range of data type short in Java?
Select one:

a.
-32768 to 32767

b.
None of the mentioned

c.
-128 to 127

d.
-2147483648 to 2147483647

Answer 93

-32768 to 32767

Question 94

In Java, ____ is a built-in class that provides you with the means for storing and manipulating character strings.

a.
Escape

b.
Character

c.
String

d.
Type

Answer 94

String

Question 95

When nesting loops, the variable in the outer loop changes more frequently.

Answer 95

False’.

Question 96

Which of these selection statements test only for equality?
Select one:

a.
if

b.
None of the mentioned

c.
switch

d.
Both if and switch

Answer 96

switch

Question 97

Even if a statement occupies multiple lines, the statement is not complete until the semicolon is reached.

Answer 97

True’.

Question 98

What is the output of relational operators?
Select one:

a.
Characters

b.
Integer

c.
Double

d.
Boolean

Answer 98

Boolean

Question 99

What is the output of this program?
 class operators {
 public static void main(String args[])
 {
 int var1 = 5; 
 int var2 = 6;
 int var3;
 var3 = ++ var2 * var1 / var2 + var2;
 System.out.print(var3);
 } 
 }
Select one:

a.
12

b.
11

c.
56

d.
10

Answer 99

11

Question 100

The extension of the bytecode file that is generated after successful compilation is .java

Answer 100

False’.

Question 101

Boolean is a primitive data type in Java.

Answer 101

true