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Oracle Java SE 8 Programmer I Sample Questions (Q82-Q87):

NEW QUESTION # 82
Given the code fragments:

What is the result?

A. Compilation fails only at line n2.
B. Compilation fails at both line n1 and line n2.
C. RTool::export
Tool::export
D. Compilation fails only at line n1.
E. Tool::export
Tool:export

Answer: B

NEW QUESTION # 83
Which statement is true about the switch statement?

A. It must contain the default section.
B. The break statement, at the end of each case block, is mandatory.
C. Its expression must evaluate to a single value.
D. Its case label literals can be changed at runtime.

Answer: C

Explanation:
Explanation: References:

NEW QUESTION # 84
Which two features can be implemented in a Java application by encapsulating the entity classes used? (Choose two.)

A. compile time polymorphism
B. data abstraction
C. data hiding
D. data validation
E. data memory optimization

Answer: B,C

Explanation:
Reference: https://www.geeksforgeeks.org/encapsulation-in-java/

NEW QUESTION # 85
Given the following two classes:

How should you write methods in the ElectricAccount class at line n1 so that the member variable bill is always equal to the value of the member variable kwh multiplied by the member variable rate?
Any amount of electricity used by a customer (represented by an instance of the customer class) must contribute to the customer's bill (represented by the member variable bill) through the method useElectricity method. An instance of the customer class should never be able to tamper with or decrease the value of the member variable bill.

A. Option B
B. Option D
C. Option C
D. Option A

Answer: D

NEW QUESTION # 86
Given:

And the code fragment:

Which code fragment, when inserted at line 14, enables the code to print Mike Found?

A. int f = ps.indexOf (Patient ("Mike") );
B. Patient p = new Patient ("Mike");Int f = ps.indexOf (p)
C. int f = ps.indexOf (p2)
D. int f = ps.indexOf (new Patient "Mike") );

Answer: C

NEW QUESTION # 87
......

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