Sheet 1 2015 (PDF)

Computer Software 2015
Multiple Choice Questions:

Sheet-1

(1) Suppose you define a Java class as follows:
public class Test {
}
In order to compile this class, the class should be stored in a file named
a. Test.class
b. Test.doc
c. Test.txt
d. Test.java
e. Any name with extension .java
(2) A Java statement ends with a __________.
a. comma (,)
b. semicolon (;)
c. period (.)
d. closing brace
(3) Fill in the blanks in each of the following statements:
a) A … begins the body of every method, and a … ends the body of every method.
b) … are reserved for use by Java.
c) Methods … and … display information in the command window.
(4) State whether each of the following is true or false. If false explain why.
(a) Comments cause the computer to print the text after the // on the screen when the program
executes.
(b) All variables must be given a type when they are declared.
(5) Is Java case-sensitive? What is the case for Java keywords
(6) What is the Java source code filename extension, and what is the Java bytecode filename
extension?
(7) What is a comment? What is the syntax for a comment in Java? Is the comment ignored by the
compiler?
(8) What is the statement to display a string on the console? What is the statement to display the
message “Hello world” in a message dialog box?
(9) Identify and fix the errors in the following code:
public class Welcome {
public void Main(String[] args) {
System.out.println(‘Welcome to Java!);
}
}
(10) If the exception NoClassFoundError is raised when you run a program, what is the cause
of the error?

Computer Software 2015
Sheet-1
(11) If the exception “NoClassFoundError:main” is raised when you run a program, what is
the cause of the error?