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- Question
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
- Correct Answer
- The above statement is true
ExplanationThere will always be a default constructor in every class
- 1. Client code having direct access to internal data is called
Options- A. Encapsulation
- B. DataHiding
- C. Polymorphism
- D. DataAbstraction Discuss
- 2. An algorithm written once which can be used in many places is called
Options- A. Block
- B. Function
- C. Datatype
- D. None Discuss
- 3. What are the 3main tasks of JVM? Discuss
- 4. 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
- 5. Keeping the actoins and attributes together under a single unit is called
Options- A. Encapsulation
- B. Information Hiding
- C. Polymorphism
- D. Inheritance Discuss
- 6. Which of the following is not the other name of attriibute?
Options- A. Data member
- B. Instance variable
- C. instance
- D. Data filed Discuss
- 7. 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
- 8. 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
- 9. Which method names follow the JavaBeans standard?
Options- A. addSize
- B. putDimensions
- C. getCust
- D. deleteRep Discuss
- 10. What is the difference between throw and throws clause? Discuss
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Correct Answer: DataHiding
Explanation:
Client code must use setters and getters to access internal data in DataHiding
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: 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
Correct Answer: A throw is used to throw an exception manually, where as throws is used in the case of checked exceptions, to tell the compiler that we haven't handled the exception, so that the exception will be handled by the calling function
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