Oracle 1z0-813 Free Practice Questions

NEW QUESTION 1
Given:

Which result possible?

• A. L1 w3
• B. L2 w3
• C. L1 L2 w3
• D. w3
• E. Compilation fail

Answer: E

NEW QUESTION 2
Given:

What is the result?

• A. 0 1 2 3 4
• B. 0 1 2 3 4
• C. 1 1 1 1 1
• D. 1 2 3 4 5

Answer: C

NEW QUESTION 3
Given the code fragments:

• A. Optional (France) Not Found
• B. FranceOptional [Not Found]
• C. optional [France] Optional [Not Found]
• D. France Not Found

Answer: D

NEW QUESTION 4
Which code fragment, when inserted at line n1, produces the result fy20`4.txt?

• A. stream<path> files =Files.find(path
• B. get(“D\ report”) , (p, a) -> a isRagular File ());
• C. stream<path> files = File
• D. Wal
• E. get(“D\ report”);
• F. stream<path> files = File
• G. Wal
• H. get(“D\ report”), 3, (p, a) -> p.isregularFile()) ;
• I. stream<path> files = Files.find(path
• J. get(“D\ report”\ry2014.txt”)) ‘

Answer: B

NEW QUESTION 5
Given the interface:

Which class implements idGenerator in a safe manager, so that no threads can get a duplicate id value during concurrent access?

• A. public class Generator implements IdGenerator ( Private volatile int Id -0;Public int getNExt Td() | Synchronized (new generator()) { return ++id;}}}
• B. public class Generator implements IdGeneretor ( Private int id =0;Public int getNExtId {) { Synchronized (new generator()) { return ++id;}}}
• C. public Class Generator implement IdGenerator ( privateAtcmicinInteger id - new AtomaticIntegger (0); public int getNextId{} {return i
• D. Increaseincrasement AndSet{) ;}}
• E. public Class Generator implement IdGenerator ( Private int id =0;Public int getNextId { ) { Synchronized (id) ; return ++id}}
• F. public Class Generator implement IdGenerator ( Private int id =0;Public int getNextId { ) { Synchronized (id) ; return ++id}}}Return ++id;

Answer: C

NEW QUESTION 6
Given the code fragment:

What is the result, if the filesalesreport. dat does not exist?

• A. class Java.ia.IOException
• B. Compilation fails at line 6 and 13.
• C. class java.i
• D. flilenNOlfoundException
• E. Compilation fails only at line 6.
• F. Compilation fails only at line 13.

Answer: E

NEW QUESTION 7
Given:

Which code fragment should be inserted at line n1 to enable the code to print 2ot cot Lion Tiger?

• A. Array
• B. Sort (strArray, (CheckClass:: Checkvalue) ;
• C. Array
• D. Sort (strArray, CheckClass:: checkvalue) ;
• E. Array
• F. Sort (strArray CheckClass :: new:: checkvalue) ;
• G. Array
• H. Sort (strArray, (Checkless:: new, checkValue) ;

Answer: B

NEW QUESTION 8
Which two elements must be present in any valid pipeline?

• A. a lambda expression or a method reference
• B. o terminal operation
• C. one or more Intermediate operations
• D. a reduction operation
• E. a source

Answer: BE

NEW QUESTION 9
Given the code fragment:

Which should be inserted into line n1 to print Average -2.5?

• A. TNT.stream atr = Stream.of (1, 2, 3, 4);
• B. IntStream str =IntStream.of (1, 2, 3, 4);
• C. DoubleSteram str- intstream.of (1, 0, 2.0, 3.0, 4.0,);
• D. Steram str = Stream.of (1, 2, 3, 4);

Answer: C

NEW QUESTION 10
Given the code fragments:

Which modification enables the code to printTry again?

• A. Replication line 27 with: Throw e;
• B. Replication line 26 with:) catch (Exception | ArithmetiExeception | numberFormate Exception e) {
• C. Replace line 26 with:) catch (ArituretcExeption | NumberFormException e) {
• D. Comment the lines 28, 29, and 30.

Answer: D

NEW QUESTION 11
Give the code fragment:

What is the result?

• A. word: why what when
• B. word: why word: why what word: why what when
• C. Compilation fails.
• D. word: why word: what word: when

Answer: A

NEW QUESTION 12
Given:

Which code fragment, when instead at Line n1, enables the Birdie class to compile?

• A. static void fly (consumer <? Extends Brid Eird} { Bird.accept().fly()?
• B. static void fly(consumer>Bird> bird (Bir
• C. Accept {} fly {)?}
• D. static void fly (supplisr<Bird> bird) ( Bird.get 1). Fly() ;}
• E. static void fly (supplier <? extends Bird> bird } { bird.get{) ;}

Answer: B

NEW QUESTION 13
Given the code fragment:

Which code fragment, when inserted at line n1, enables the code to print ABCD?

• A. string str = sList.stream reduce () .reduce (“A”, (s1, s2) -> s1.concat (s2)) ;
• B. string str = sList.stream reduce () .reduce (“ “, (s1, s2) -> s1.concat (s2));
• C. string str = sList.stream reduce () .reduce (“A” , string: : concat) ;
• D. string str = sList.stream reduce (). Reduce (s1, s2) ->s1, concat (82) ;

Answer: B

NEW QUESTION 14
Given the code fragment:

What change must you make to enable the code to print the following output?
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8

• A. Replication line 8 with.pook(o -> 1 myLis
• B. Add(c) ; )}.
• C. Replication line 12 with Parallelstrees{).
• D. Replication line 7 withStream{).
• E. Replication line 13 withforEachorder{c -> system.out.print { c + “ “} ;.

Answer: C

NEW QUESTION 15
Which is true regarding the jaa.nio.file.Path interface?

• A. Implementation of this Interface are nor safe for use by multiple concurrent threads.
• B. implementations of this interface arc immutable.
• C. The interface extends the watchservice Interface.
• D. Paths associated with the default provider are not interoperable with the java.io.File clas

Answer: B

NEW QUESTION 16
Given the code fragments:

What is the result?

• A. Java SE: 2000.0 Java XE: 120.0B .java SE: 300.0 Java XE : 120.0
• B. Compilation fails due to at line 15.
• C. Compilation falls due to an error at line 16.

Answer: A

NEW QUESTION 17
Given:

What is the result?

• A. [Java ME:Jessy: Chicago, ME: Mark: Chicago] [Java EF: Helan: Houston]
• B. Java EE Java XE
• C. [JavaEF: Helen:Houton] [JavaME : Jassy: Chicago, Java ME: mArk: Chicago]
• D. A compilation error occur

Answer: B

NEW QUESTION 18
Given the code fragment:

What type of result is printed?

• A. Era
• B. Time of the Epoch (in milliseconds)
• C. Full text time zone name
• D. Time zone abbreviation
• E. Julian date

Answer: B

NEW QUESTION 19
Which statement Is true about the single abstract method of the java.util.function.Function Interface?

• A. It accepts an argument and produces a result of any data type.
• B. It accepts one argument and returns void.
• C. It accepts one argument and always produces a result of the same type as the argument.
• D. It accepts one argument and returns boolea

Answer: A

NEW QUESTION 20
Give the code fragment:

What is the result?

• A. 0 : 1 : 2 : 3 : 4 :
• B. 0 : 0 : 0 : 0 : 0 : pen
• C. A compilation error occurs.
• D. 0 : 1 : pen
• E. 0 : 0 : pen

Answer: E

NEW QUESTION 21
Given the code fragments:

What is the result?

• A. DodcatMOUSE
• B. [Do
• C. Cat, Mouse]
• D. null
• E. compilation error occur

Answer: D

NEW QUESTION 22
Given:

What is the result?

• A. 2000. 0
• B. A compilation error occur
• C. 1500. 0
• D. 0 0

Answer: C

NEW QUESTION 23
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