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Q1. Given the code fragment:
What is the result?
A. Values are : [EE, ME]
B. Values are : [EE, EE, ME]
C. Values are : [EE, ME, EE]
D. Values are : [SE, EE, ME, EE]
E. Values are : [EE, ME, SE, EE]
Answer: E
Q2. Given:
public class TestOperator {
public static void main(String[] args) {
int result = 30 -12 / (2*5)+1;
System.out.print("Result = " + result);
}
}
What is the result?
A. Result = 2
B. Result = 3
C. Result = 28
D. Result = 29
E. Result = 30
Answer: E
Q3. Given:
public class FieldInit {
char c;
boolean b;
float f;
void printAll() {
System.out.println("c = " + c);
System.out.println("c = " + b);
System.out.println("c = " + f);
}
public static void main(String[] args) {
FieldInit f = new FieldInit();
f.printAll();
}
}
What is the result?
A. c = null
b = false
f = 0.0F
B. c = 0
b = false
f = 0.0f
C. c = null
b = true
f = 0.0
D. c =
b = false
f = 0.0
Answer: D
Q4. Given:
Class A { }
Class B { }
Interface X { }
Interface Y { }
Which two definitions of class C are valid?
A. Class C extends A implements X { }
B. Class C implements Y extends B { }
C. Class C extends A, B { }
D. Class C implements X, Y extends B { }
E. Class C extends B implements X, Y { }
Answer: A,E
Explanation: extends is for extending a class.
implements is for implementing an interface. Java allows for a class to implement many interfaces.
Q5. Which usage represents a valid way of compiling java source file with the name "Main"?
A. javac Main.java
B. java Main.class
C. java Main.java
D. javac Main
E. java Main
Answer: A
Explanation: The compiler is invoked by the javac command. When compiling a Java class, you must include the file name, which houses the main classes including the Java extension. So to run Main.java file we have to use command in option A. TO execute Java program we can use Java command but can't use it for compiling. https://docs.oracle.com/javase/tutorial/getStarted/application/index.html
Q6. Given:
public class MainMethod {
void main() {
System.out.println("one");
}
static void main(String args) {
System.out.println("two");
}
public static void main(String[] args) {
System.out.println("three");
}
void mina(Object[] args) {
System.out.println("four");
}
}
What is printed out when the program is excuted?
A. one
B. two
C. three
D. four
Answer: C
Q7. Given the code fragment:
for (int ii = 0; ii < 3;ii++) {
int count = 0;
for (int jj = 3; jj > 0; jj--) {
if (ii == jj) {
++count;
break;
}
}
System.out.print(count); continue; }
What is the result?
A. 011
B. 012
C. 123
D. 000
Answer: A
Q8. Given:
What is the result?
A. 10 20 30 40
B. 0 0 30 40
C. Compilation fails
D. An exception is thrown at runtime
Answer: A
Q9. Given:
How many objects have been created when the line / / do complex stuff is reached?
A. Two
B. Three
C. Four
D. Six
Answer: C
Q10. Given the code fragment:
What could expression1 and expression2 be, respectively, in order to produce output –8, 16?
A. + +a, - -b
B. + +a, b- -
C. A+ +, - - b
D. A + +, b - -
Answer: D