Java MCQs (Multiple Choice Questions) with Answers - Set I

Q1. Java has its origin in which language?

a) Oak

b) COBOL

c) C

d) Perl

Q2. Java programs are best described as:

a) Faster than programs in every other language

b) Not scalable

c) Not reusable

d) Platform independent

Q3. Which one of the following is true for Java?

a) Java is always faster than C

b) Java is object-oriented and interpreted

c) Java has no garbage collection

d) Java is not robust

Q4. Java servlets are an efficient and powerful way to create ________ for the web.

a) Dynamic content

b) Hardware drivers

c) Static content

d) Desktop user interfaces

Q5. The command javac is used to:

a) Create a JAR file

b) Run a Java program

c) Compile a Java program

d) Debug a Java program

Q6. Which of the following is NOT a Java feature?

a) Architecture neutral

b) Object-oriented

c) Dynamic

d) Use of pointers

Q7. Which of these gives Java its portability and security?

a) Dynamic binding between objects

b) Bytecode is executed by the JVM

c) Exception handling

d) Applets make the code secure

Q8. A native-protocol pure Java (Type 4) JDBC driver converts ________ into the ________ used by the DBMS directly.

a) JDBC calls, network protocol

b) ODBC calls, user calls

c) ODBC calls, network protocol

d) JDBC calls, user calls

Q9. Which is the root class of all AWT events?

a) java.awt.AWTEvent

b) java.awt.ActionEvent

c) java.awt.event.Event

d) java.awt.event.AWTEvent

Q10. Which of these are benefits of object-oriented programming? i) Higher productivity ii) Reusability iii) Lower maintenance cost iv) High vulnerability

a) ii, iii and iv

b) All four

c) i, ii and iv

d) i, ii and iii

Q11. Which tool is used to find and fix bugs in Java programs?

a) JRE

b) jdb

c) JDK

d) JVM

Q12. Filters were officially introduced in which Servlet specification?

a) 2.1

b) 2.2

c) 2.3

d) 2.4

Q13. The break statement is used to: i) get out of a method ii) end a program iii) get out of a loop iv) get out of the system

a) i and ii

b) iii only

c) i, ii and iv

d) i and iii

Q14. If x = 3, y = 5 and z = 10, what is the value of this expression?

++z + y - y + z + x++

a) 23

b) 25

c) 20

d) 24

Q15. What does this program print?

public class CodingHumans {
    static int a = 10;
    static int n;
    int b = 5;
    int c;

    public CodingHumans(int m) {
        System.out.println(a + ", " + b + ", " + c + ", " + n + ", " + m);
    }

    { b = 30; n = 20; }

    static { a = 60; }

    public static void main(String[] args) {
        new CodingHumans(7);
    }
}

a) 60, 5, 0, 0, 7

b) 10, 5, 0, 20, 7

c) Compilation error

d) 60, 30, 0, 20, 7