Oracle : 1Z0-501 Questions & Answers

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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

1. Which code determines the int value foo closest to a double value bar?

A) Int foo = (int) Math.abs(bar);
B) Int foo = (int) Math.ceil(bar);
C) Int foo = (int) Math.min(bar);
D) Int foo = (int) Math.round(bar);
E) Int foo = (int) Math.max(bar);
F) Int foo = (int) Math.floor(bar);

2. Given:
1 . public class SyncTest (
2 . private int x;
3 . private int y;
4 . private synchronized void setX (int i) (x=1;)
5 . private synchronized void setY (int i) (y=1;)
6 . public void setXY(int 1)(set X(i); setY(i);)
7 . public synchronized Boolean check() (return x !=y;)
8 . )
Under which conditions will check () return true when called from a different class?

A) Check() can never return true.
B) Check() can return true when setXY is called by multiple threads.
C) Check() can return true when multiple threads call setX and setY separately.
D) Check() can only return true if SyncTest is changed to allow x and y to be set separately.

3. You want a class to have access to members of another class in the same package. Which is the most restrictive access modifier that will accomplish that will accomplish this objective?

A) Private
B) Public
C) Transient
D) No access modifier is required.
E) Protected

4. Which three are valid declarations of a float? (Choose Three)

A) Float foo = 3.03d;
B) Float foo = -1;
C) Float foo = 1.0;
D) Float foo = 2.02f;
E) Float foo = 42e1;
F) Float foo = 0x0123;

5. CORRECT TEXT
Given:
5. String foo = "base";
6. foo.substring(0,3);
7. foo.concat("ket")
8. Type the value of foo at line 8.

Solutions: