CS506 Midterm Solved MCQs with References by Moaaz

Solved MCQS · From Midterm Papers · April 28,2012 · PSMD01 · Spring 2010

If we remove static from main then program __________

1. Program cannot compile
2. Program will compile and work properly
3. Run time errors

If we remove String array from main then program____________

1. Program cannot compile
2. Program will compile and work properly
3. Exception throws in main

Java developed in __________

1. 1990
2. 1995 (Page 12)
3. 1997
4. 2000

Correct answer: 1995 (Page 12)

Fall 2008

Which of the following methods are invoked by the AWT to support paint and repaint operations?

1. repaint( )
2. draw( )
3. redraw( )

When defining a method you must include a ___________ to declare any exception that might be thrown but is not caught in the method.

1. try block
2. finally block
3. catch block

Aside from the Scanner class, which of the following classes can be used for text-file file input?

1. ObjectInputStream
2. StringTokenizer
3. None of these

Which of the following statements is true regarding Vectors with no specified base type?

1. A base type is needed, because Java needs to know how to allocate memory.
2. If a base type is not specified the code will not compile.
3. No base type is needed because Vectors default to storing String objects.

A serializable class must implement the method(s) _________.

1. readObject and writeObject
2. Either readObject or writeObject, or both, depending upon the desired behavior
3. None of the given option

You can ---------to a network using sockets.

1. Read
2. Write
3. Read/Write (Page 222)
4. None of these

Correct answer: Read/Write (Page 222)

Socket is a --------------communication channel between hosts.

1. Uni-directional
2. Bi-directional (Page 211)
3. Multi-directional
4. None of these

Correct answer: Bi-directional (Page 211)

Which of the following are passed as an argument to the paint ( ) method?

1. A Canvas object
2. An Image object
3. A paint object

The code below draws a line. What color is the line? g.setColor(Color.red.green.yellow.red); g.drawLine(0, 0, 100,100);

1. Red
2. Green
3. Yellow
4. Black

Correct answer: Black

To create DataBaseMetaData object we write following line of code

1. DataBaseMetaData db = con.getMeataData(); (Page 177)
2. ResultSetMetaData rsmd = rs.getMetaData();
3. ResultSetMetaData rsmd = rs.setMetaData();
4. DataBaseMetaData db = con.setMeataData();

Correct answer: DataBaseMetaData db = con.getMeataData(); (Page 177)