Technology problems
- 1. Which of the following is not the other name of attriibute?
Options- A. Data member
- B. Instance variable
- C. instance
- D. Data filed Discuss
Correct Answer: instance
Explanation:
Instance is an object not an attribute
- 2. 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
Correct Answer: Value
Explanation:
In single virtual machine,JVM passes arguments only by value.
- 3. 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
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.
- 4. Which method names follow the JavaBeans standard?
Options- A. addSize
- B. putDimensions
- C. getCust
- D. deleteRep Discuss
Correct Answer: getCust
Explanation:
C use the valid prefixes 'get' and 'is
- 5. What is the difference between throw and throws clause? Discuss
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
- 6. What are the various elements of OOPS? Discuss
Correct Answer: Various elements of OOP are: ? Object ? Class ? Method ? Encapsulation ? Information Hiding ? Inheritance ? Polymorphism
- 7. A lock can be acquired on a class. The above statement is
Options- A. True
- B. False
- C. Both A and B
- D. None Discuss
Correct Answer: True
Explanation:
A lock can be acquired on a class. This lock is acquired on the class's Class object.
- 8. Which of the following modifiers can be used with Local inner class?
Options- A. Final or Abstract
- B. Final or Transcient
- C. Abstract or Transcient
- D. Final or public Discuss
Correct Answer: Final or Abstract
Explanation:
It can either be Final or Abstract
- 9. How many types of classes are there in Java? Discuss
Correct Answer: Two types of classes: 1) Top Level Class 2) Classes within Class i) member classes a) static member class b) non static member class ii) local classes iii) anonymous classes
- 10. If you are using C language to implement the heterogeneous linked list, what pointer type will you use? Discuss
Correct Answer: The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them It is not possible to use ordinary pointers for this So we go for void pointer Void pointer is capable of storing pointer to any type as it is a generic pointer type
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