Question 21 The method __________ sets the font (Helvetica, 20­point bold) in co

Question

Question 21

The method __________ sets the font (Helvetica, 20­point bold) in component C.

a) c.setFont(new Font("Helvetica", Font.bold, 20))

b) c.setFont(new Font("helvetica", BOLD, 20))

c) c.setFont(Font("Helvetica", Font.BOLD, 20))

d) c.setFont(new Font("Helvetica", Font.BOLD, 20))

Question 22

To specify an italic font, you pass ____ to the constructor.

a) Font.ITALIC

b) Font.BOLD

c) PLAIN.ITALIC

d) ITALIC

Question 23

Which class do you use to read data from a text file?

a) File

b) Formatter

c) Scanner

d) Input

Question 24

An attribute that is shared by all objects of the class is coded using _____________.

a) an instance variable

b) a static instance variable

c) an instance method

d) a static method

Question 25

Usually, the subclass constructor only needs to initialize the ____ that are specific to the subclass.

a) objects

b) data fields

c) methods

d) constructors

Question 26

When you instantiate an object from a class, ____ is reserved for each instance field in the class.

a) a constructor

b) a signature

c) memory

d) a field name

Question 27

Select appropriate method out of number of methods' definitions at execution time is called _______.

a) Compiling

b) Static binding

c) Dynamic binding

d) Matching

Question 28

An abstract class can contain ____.

a) only abstract methods

b) only non­abstract methods

c) abstract and non­abstract methods

d) nothing

Question 29

When you create a class and do not provide a(n) ____, Java automatically supplies you with a default one.

a) constructor

b) argument

c) header

d) name

Question 30

Which of the following is used to allocate memory for the instance variables of an object of a class?

a) the reserved word public

b) the reserved word static

c) the operator new

d) the operator +

Question 31

Which of the following correctly declares and initializes a String object?

a) new String = Hello

b) String greeting == "Hello"

c) String greeting = "Hello"

d) String new = "Hello"

Question 32

Imageobjects are displayed using which Graphicsmethod?

a) drawImage.

b) paintImage.

c) getImage.

d) setImage.

Question 33

What layout manager should you use so that every component occupies the same size in the container?

a) a FlowLayout

b) a GridLayout

c) a BorderLayout

d) any layout

Question 34

When an object of one class is a data field within another class, they are related by ____.

a) extension

b) scope

c) composition/has­a

d) is­a

Question 35

The ____ method takes a String argument and returns its double value.

a) parseString()

b) parseInt()

c) parseDouble()

d) returnDouble()

Question 36

The compiler determines which version of a method to call by the method’s ____.

a) name

b) signature

c) output

d) constructor

Question 37

Which JFrameJFrame method is used to display the frame?

a) Display().

b) Load().

c) setVisible(true)

d) show(true)

Question 38

___________ can be used to enter or display a string.

a) A label

b) A button

c) A check box

d) A radio button

e) A text field

Question 39

The ____ method creates a solid arc.

a) solidArc()

b) fillArc()

c) clearArc()

d) drawArc()

Question 40

Which method can be used to create an input object for file temp.txt?

a) new Scanner("temp.txt")

b) new Scanner(temp.txt)

c) new Scanner(Paths.get("temp.txt"))

d) new Scanner(Path("temp.txt"))

Question 42

What happens in a method if there is an exception thrown in a try block but there is no catch block following the try block?

a) The program ignores the exception.

b) The program will not compile without a complete try/catch structure.

c) The program terminates immediately.

d) The program throws an exception and proceeds to execute the finally block.

Question 43

Which of the following words indicates an object’s reference to itself?

a) this

b) that

c) public

d) protected

Question 44

Suppose s is a string with the value "java". What will be assigned to x if you execute the following code? char x = s.charAt(4)

a) "a"

b) "v"

c) Nothing due to a runtime error StringIndexOutofBoundsException

d) "java"

Question 45

____ variables are variables that are shared by every instantiation of a class.

a) Local

b) Instance

c) Class/Static

d) Time

Question 46

Which of the following statements starts a polygon named pol at the coordinates 20 and 290?

a) pol.moveTo(20F, 290F)

b) pol.lineTo(20F, 290F)

c) pol = new Path(20F, 290F)

d) pol.newPath(20F, 290F)

Question 47

Suppose str is a String variable. The statement

str = new String("Programming")

is similar to which of the following?

a) new String = "Programming"

b) String new = "Programming"

c) str = "Programming"

d) str new "Programming"

Question 48

The ____ method requires four arguments and draws the outline of a rectangle using the current drawing color.

a) clearRect()

b) drawRect()

c) fillRect()

d) paintRect()

Question 49

Which of the following is a valid statement?

(i) int num = new int(67)

(ii) String name = new ("Doe")

(iii) String name = "Doe"

a) Only (i)

b) Only (i) and (ii)

c) Only (iii)

d) Only (ii) and (iii)

Question 50

Which of the following generates GUI events?

a) Typing in a text field.

b) Selecting an item from a menu.

c) Click on a button

d) All of above

Explanation / Answer

21)ans)d

22)Ans)a

23)ans)c

24)ans)d

25)ans)b

26)ans)c

27)ans)c

28)ans)c

29)ans)a

30)ans)c

31)ans)c

32)ans)a

33)ans)b

34)ans)d

35)ans)b

36)ans)b

37)ans)c

38)ans)e

39)ans)b

40)ans)c

42)ans)d

43)ans)a

44)ans)c

45)ans)c

46)ans)a

47)ans)c

48)ans)b

49)ans)c

50)ans)d

_____________Thank You

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