Web Services Development MCQs with Answers
Practice important Web Services Development MCQs with answers and explanations.
Chapter: 1
Q61:
What is the output of the following code? int i = 4; double d = i; System.out.println(d);
A. 4
B. 4
C. 4
D. 4
Correct Answer:
B
Chapter: 1
Q62:
In down-casting, why is explicit casting required?
A. To prevent information loss
B. Because the compiler automatically handles it
C. To convert from smaller datatype to larger datatype
D. To ensure safe conversion
Correct Answer:
A
Chapter: 1
Q63:
Which of the following describes the process of down-casting?
A. Converting a larger datatype to a smaller datatype
B. Converting a smaller datatype to a larger datatype
C. Implicit conversion
D. Automatic conversion
Correct Answer:
A
Chapter: 1
Q64:
In the example provided, how can the FillCircle method be called after down-casting?
A. ((Circle)s).FillCircle()
B. s.FillCircle();
C. s.Draw();
D. s.Fill();
Correct Answer:
A
Chapter: 1
Q65:
Why is down-casting considered potentially unsafe?
A. It can lead to runtime errors
B. It always succeeds
C. It is handled by the compiler
D. It doesn't require explicit casting
Correct Answer:
A
Chapter: 2
Q66:
How many types of variables are there in Java?
A. Two
B. Three
C. Four
D. Five
Correct Answer:
B
Chapter: 2
Q67:
Local variables are declared in __________.
A. classes
B. constructors
C. methods, constructors, or blocks
D. objects
Correct Answer:
C
Chapter: 2
Q68:
Instance variables are created when __________.
A. the class is declared
B. the object is created
C. the method is called
D. the block is initialized
Correct Answer:
B
Chapter: 2
Q69:
Which type of variable is declared with the keyword 'static'?
A. Instance variable
B. Local variable
C. Class variable
D. Method variable
Correct Answer:
C
Chapter: 2
Q70:
Which variables have only one copy per class?
A. Instance variables
B. Local variables
C. Class variables
D. Method variables
Correct Answer:
C
Chapter: 2
Q71:
Which of the following is TRUE about class variables?
A. They are destroyed when the object is destroyed.
B. They are created with the 'new' keyword.
C. They are always private.
D. They can be declared as constants.
Correct Answer:
D
Chapter: 2
Q72:
What is the function of JVM (Java Virtual Machine)?
A. Loads and verifies code
B. Executes code
C. Provides runtime environment
D. All of the above
Correct Answer:
D
Chapter: 2
Q73:
What is the implementation of JVM known as?
A. JDK
B. JRE
C. IDE
D. JIT
Correct Answer:
B
Chapter: 2
Q74:
Which of the following is NOT a component of JVM's internal architecture?
A. Classloader
B. Memory area
C. Register set
D. Compilation engine
Correct Answer:
D
Chapter: 2
Q75:
Which of the following is a primitive data type in Java?
A. String
B. Array
C. int
D. Class
Correct Answer:
C
Chapter: 2
Q76:
The operator '+' in Java performs __________.
A. Subtraction
B. Division
C. Multiplication
D. Addition
Correct Answer:
D
Chapter: 2
Q77:
If A = 10 and B = 20, what is the result of A * B?
A. 200
B. 30
C. -10
D. 10
Correct Answer:
A
Chapter: 2
Q78:
The '++' operator in Java __________.
A. Decreases the value by 1
B. Increases the value by 1
C. Subtracts the right-hand operand
D. Divides the left-hand operand
Correct Answer:
B
Chapter: 2
Q79:
JVM provides definitions for __________.
A. Memory area
B. Class file format
C. Fatal error reporting
D. All of the above
Correct Answer:
D
Chapter: 2
Q80:
What are the two types of data types in Java?
A. Primitive and Abstract
B. Class and Object
C. Primitive and Non-Primitive
D. Static and Dynamic
Correct Answer:
C