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- Question
Client code having direct access to internal data is called
Options- A. Encapsulation
- B. DataHiding
- C. Polymorphism
- D. DataAbstraction
- Correct Answer
- DataHiding
ExplanationClient code must use setters and getters to access internal data in DataHiding
- 1. An algorithm written once which can be used in many places is called
Options- A. Block
- B. Function
- C. Datatype
- D. None Discuss
- 2. What are the 3main tasks of JVM? Discuss
- 3. By whom will the unallocated memory that is no longer needed will be cleared in java?
Options- A. Java Virtual Machine
- B. Garebage collector
- C. Both A and B
- D. None Discuss
- 4. Keeping the actoins and attributes together under a single unit is called
Options- A. Encapsulation
- B. Information Hiding
- C. Polymorphism
- D. Inheritance Discuss
- 5. How many of the following will follow JavaBean Listener naming rules? addListener addMouseListener deleteMouseListener removeMouseListener registerMouseListener
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 6. There is one default constructor in every class.
Options- A. The above statement is true
- B. The above statement is false
- C. Both true and false
- D. None Discuss
- 7. Which of the following is not the other name of attriibute?
Options- A. Data member
- B. Instance variable
- C. instance
- D. Data filed Discuss
- 8. In a single virtual machine, the Java programming language passes arguments by
Options- A. Refference
- B. Value
- C. Both A and B
- D. None Discuss
- 9. Which key word is to be used to tell the JVM to skip the variable while performing the serialization process of the object containing it?
Options- A. Transcient
- B. Volatile
- C. Static
- D. Final Discuss
- 10. Which method names follow the JavaBeans standard?
Options- A. addSize
- B. putDimensions
- C. getCust
- D. deleteRep Discuss
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Correct Answer: Function
Explanation:
Function is an algorithm which can be used any where in the program when required
Correct Answer: The JVM performs three main tasks: ? Loads code ? Verifies code ? Executes code
Correct Answer: Garebage collector
Explanation:
The Java programming language provides a system-level thread to track memory allocation.
Garbage collection has the following characteristics:
? Checks for and frees memory no longer needed
? Is done automatically
? Can vary dramatically across JVM implementations
Correct Answer: Encapsulation
Explanation:
Encapsulation is a process of binding the data objects together under a single unit.It is one ofthe elements of oops
Correct Answer: 2
Correct Answer: The above statement is true
Explanation:
There will always be a default constructor in every class
Correct Answer: instance
Explanation:
Instance is an object not an attribute
Correct Answer: Value
Explanation:
In single virtual machine,JVM passes arguments only by value.
Correct Answer: Transcient
Explanation:
If you mark an instance variable as transient, you're telling the JVM to skip (ignore) this variable when you attempt to serialize the object containing it.
Correct Answer: getCust
Explanation:
C use the valid prefixes 'get' and 'is
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