Unit 1
Which code block prints the string on a different line?
a. System.out.print(“CSA”);
b. System.out.println(CSA);
c. System.out.print(CSA);
d. System.out.println(“CSA”);
d. System.out.println(“CSA”);
Class is a _____ for an object. Object is an _____ of the class.
Blueprint, instance
What is the output of the following code?
int x = 7;
if (x > 5) {
if (x % 2 == 0) {
System.out.println("Even");
} else {
System.out.println("Odd");
}
} else {
System.out.println("Small");
}
A. Even
B. Odd
C. Small
D. Compile-time error
B. odd
Consider the following code segment:
int sum = 0;
for (int i = 1; i <= 10; i++) {
if (i % 2 == 0) {
sum += i;
}
}
System.out.println(sum);
What is printed when the code above is executed?
A) 30
B) 25
C) 20
D) 15
E) 10
A) 30
Objects in Java can interact by _____ another object’s methods and _____ another object’s fields.
Accessing, calling
If a variable X of type double is assigned the value 9E307, which expression could result in an unexpected Infinite value due to overflow?
a. x*10
b. X+10
c. A and B
d. None of the above
a. x*10
Identify the error in this code:
String greeting = "Hello";
System.out.println(greeting.charAt(5));
indexOutOfBounds exception
What is the output of the following code?
int x = 8;
if (x > 5 && x < 10) {
System.out.println("Range A");
} else if (x == 10) {
System.out.println("Range B");
} else {
System.out.println("Out of Range");
}
A. Range A
B. Range B
C. Out of Range
D. Compile-time error
A. Range A
What will the following code print?
for (int i = 1; i <= 3; i++) {
for (int j = i; j <= 3; j++) {
System.out.print(i + j + " ");
}
}
A. 2 3 4 3 4 5 4 5 6
B. 2 3 4 4 5 6 6
C. 3 4 5 6
D. 2 3 3 4 4
A. 2 3 4 3 4 5 4 5 6
Heap memory is used to store _____.
a. Variables, primitives, and references
b. Constructors
c. Objects
d. Garbage collection
c. Objects
Which statement correctly declares a variable that can store the amount of flour to put in the cupcakes?
a. String amtFlour;
b. int amtFlour;
c. double amtFlour;
d. Double amtFlour;
c. double amtFlour;
int a = 10;
int b = 5;
System.out.println(a / b);
a. 2
b. 2.0
c. 5
d. 5.0
b. 2.0
Consider the following code:
boolean x = false;
int y = 5;
if (x && y++ > 5) {
System.out.println("Condition met");
}
System.out.println("y: " + y);
What is the output?
A. Condition met
B. y: 5
C. y: 6
D. Compile-time error
B. y:5
What will the following code print?
for (int i = 0; i < 5; i++) {
int j = i * 2;
j++;
System.out.print(j + " ");
}
System.out.println(j);
A. 1 3 5 7 9 and then a compilation error
B. 1 3 5 7 9 10
C. 1 3 5 7 9 and then nothing
D. Compilation error due to j being out of scope.
D. Compilation error due to j being out of scope.
What is not a component of encapsulation?
a. Private fields
b. Public getter/setter methods
c. Formal parameters
d. Access modifiers
c. Formal parameters