CSE 205 Midterm Review UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Evaluate the following code to determine the output.
class Foo {
public int i = 62;
public Foo(int i) {
this.i = i;
}
}
...
Foo x = new Foo(15), y = new Foo(50);
y.i = x.i;
y.i = 10;
System.out.println(x.i); - CORRECT ANSWER - 15
Which of the following are valid Java Identifiers? - CORRECT ANSWER - - Names can
CONTAIN letters, digits, underscores, and dollar signs
- Names MUST begin with a letter
- Names 'should' start with a lowercase letter and it cannot contain whitespace
- Reserved words (like Java keywords, such as int or boolean) cannot be used as names
Ex. of proper identifiers:
SpEcIaL_vAlUe
a555c
,Tax
age1
What will be the output of this code?
int a = 5;
int x = a;
a = 10;
System.out.print(x); - CORRECT ANSWER - 5
Given the following int (integer) variables, a = 15, b = 46, c = 4, d = 5, evaluate the expression:
a + b % (c * d) - CORRECT ANSWER - 21
(T/F) Evaluate this logical expression:
true || ! false - CORRECT ANSWER - True
(T/F) Evaluate this expression: 3 <= 2 - CORRECT ANSWER - False
(T/F) Evaluate this expression: 8 + 7 > 5 && 16 - 5 <= 8 - CORRECT ANSWER - False
Which of the following are Java primitive data types? Choose all that apply. - CORRECT
ANSWER - Float, Double, Boolean, Char
Which of the following Java literals have the data type boolean? Choose all that apply. -
CORRECT ANSWER - true, false
(boolean is true / false)
, When the following expression is evaluated, the result will be what Java data type?
"-48" + "1" - CORRECT ANSWER - String
Which of the following would be the best data type for a variable to store a book title? -
CORRECT ANSWER - String
Write a line of Java code that will declare a int variable named y that is initialized to the value -
80. - CORRECT ANSWER - int y = -80;
What is the output of this Java program?
class Driver {
public static void main(String[] args) {
foo(6);
bar(8);
}
static void foo(int a) {
System.out.print(a);
bar(a - 1);
}
static void bar(int a) {
System.out.print(a);
}
} - CORRECT ANSWER - 658
What is the output of this Java program?
ACTUAL Exam Questions and CORRECT
Answers
Evaluate the following code to determine the output.
class Foo {
public int i = 62;
public Foo(int i) {
this.i = i;
}
}
...
Foo x = new Foo(15), y = new Foo(50);
y.i = x.i;
y.i = 10;
System.out.println(x.i); - CORRECT ANSWER - 15
Which of the following are valid Java Identifiers? - CORRECT ANSWER - - Names can
CONTAIN letters, digits, underscores, and dollar signs
- Names MUST begin with a letter
- Names 'should' start with a lowercase letter and it cannot contain whitespace
- Reserved words (like Java keywords, such as int or boolean) cannot be used as names
Ex. of proper identifiers:
SpEcIaL_vAlUe
a555c
,Tax
age1
What will be the output of this code?
int a = 5;
int x = a;
a = 10;
System.out.print(x); - CORRECT ANSWER - 5
Given the following int (integer) variables, a = 15, b = 46, c = 4, d = 5, evaluate the expression:
a + b % (c * d) - CORRECT ANSWER - 21
(T/F) Evaluate this logical expression:
true || ! false - CORRECT ANSWER - True
(T/F) Evaluate this expression: 3 <= 2 - CORRECT ANSWER - False
(T/F) Evaluate this expression: 8 + 7 > 5 && 16 - 5 <= 8 - CORRECT ANSWER - False
Which of the following are Java primitive data types? Choose all that apply. - CORRECT
ANSWER - Float, Double, Boolean, Char
Which of the following Java literals have the data type boolean? Choose all that apply. -
CORRECT ANSWER - true, false
(boolean is true / false)
, When the following expression is evaluated, the result will be what Java data type?
"-48" + "1" - CORRECT ANSWER - String
Which of the following would be the best data type for a variable to store a book title? -
CORRECT ANSWER - String
Write a line of Java code that will declare a int variable named y that is initialized to the value -
80. - CORRECT ANSWER - int y = -80;
What is the output of this Java program?
class Driver {
public static void main(String[] args) {
foo(6);
bar(8);
}
static void foo(int a) {
System.out.print(a);
bar(a - 1);
}
static void bar(int a) {
System.out.print(a);
}
} - CORRECT ANSWER - 658
What is the output of this Java program?
