oracle 1z0-819 practice test

Given:

Which three classes successfully override showFirst ()?
A)

B)

C)

D)

E)

F)

• A. Option A
• B. Option B
• C. Option C
• D. Option D
• E. Option E
• F. Option F

Given:

A) An exception is thrown at run time.
B)

C) The compilation fails due to an error on line 2.
D) The compilation fails due to an error on line 1.
E)

F)
The compilation fails due to an error on line 3.

• A. Option A
• B. Option B
• C. Option C
• D. Option D
• E. Option E
• F. Option F

Given the code fragment:

Which two statement inserted independently at line 1 enable this code to print PRRT?

• A. i—;
• B. continue b;
• C. break b;
• D. j--;
• E. continue a;
• F. break a ;

Given:

What is the result?

• A. Keys: 4 Values: 4 Map: 0
• B. Keys: 4 Values: 4 Map: 4
• C. The compilation fails.
• D. Keys: 0 Values: 0 Map:
• E. Keys: 0 Values: 0 Map: 0

Given the code fragment:

What is the result?
A)

B)

C)

D)

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

Given the code fragment:

What is the result?

• A. 2
• B. -1
• C. 1
• D. -3

Given:

What is the result?

• A. Take extra care
• B. The program prints nothing.
• C. Take extra care Take extra care
• D. An exception is thrown at runtime

Given:

You want to examine the items list it contains an item for which the variable count is below zero.
Which code fragment at line 1 accomplish this?

• A. If (items.stream () .filter (i -> count < 0) . findFirst () ) {
• B. If (items.stream () .filter (i -> count < 0) . findAny () ) {
• C. If (items.stream () .allmatch (i -> count < 0) < 0) ) {
• D. If (items.stream () .anymatch (i -> count < 0) < 0) ) {

Given:

What is the result?

• A. 2134
• B. 234
• C. 2341
• D. 214

Given:

You want to implement the jav
a. Io, serializable interface to the MypersisteneData class.
Which method should be overriden?

• A. The readExternal and writeExternal method
• B. The readExternal method
• C. The writeExternal method
• D. nothing

Given the Customer table structure:
ID Number Primary Key
NAME Text Nullable
Given code fragment:

Which statement inserted on line 14 sets NAME column to a NULL value?

• A. Stmt.setNull(2, java,sql. Types, VARCHAR);
• B. Stmt.setNull(2 string, class);
• C. Stmt.setNull(2, null);
• D. Stmt.setNull(2, java.lang, string);

How many Thing objects are eligible for garbage collection in line 1?

• A. 3
• B. 2
• C. 0
• D. 1
• E. 4

A company has an existing Java app that includes two Java 8 jar files, sales-3.10. jar and clients-
10.2.jar.
The jar file ,sales -8, 10, jar reference packages in clients -10.2 jar, but clients-10.2 jar does not
reference packages in sales -8.10, jar.
They have decided to modularize clients-10.2.jar.
Which module-info. Java file would work for the new library version clients-10.3 jar?
A)

B)

C)

D)

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

Given the code fragment:

What is the result?

• A. 13 5 7 9
• B. 1 3 5 7 9 11
• C. 2 4 6 B 10
• D. 2 4 6 8

Given:

What is the result?
A)

B)

C)

D)

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