Oracle 1z0-819 dumps

Oracle 1z0-819 Exam Dumps

Java SE 11 Developer
505 Reviews

Exam Code 1z0-819
Exam Name Java SE 11 Developer
Questions 257 Questions Answers With Explanation
Update Date July 11,2024
Price Was : $81 Today : $45 Was : $99 Today : $55 Was : $117 Today : $65

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Oracle 1z0-819 Sample Questions

Question # 1

Given:  This code results in a compilation error.Which code should be inserted on line 1 for a successful compilation?

A. Consumer consumer = msg -> { return System.out.print(msg); };
B. Consumer consumer = var arg > {System.out.print(arg);};
C. Consumer consumer = (String args) > System.out.print(args);
D. Consumer consumer = System.out::print;



Question # 2

Which set of commands is necessary to create and run a custom runtime image from Java source files? 

A. java, jdeps
B. javac, jlink
C. jar, jlink
D. javac, jar



Question # 3

Given:  Which three actions implement Java SE security guidelines? (Choose three.)

A. Change line 7 to return names.clone();.
B. Change line 4 to this.names = names.clone();.
C. Change the getNames() method name to get$Names().
D. Change line 6 to public synchronized String[] getNames() {.
E. Change line 2 to private final String[] names;.
F. Change line 3 to private Secret(String[] names) {.
G. Change line 2 to protected volatile String[] names;.



Question # 4

Analyze the code:  Which two options can you insert inside println method to produce Global:namescope?(Choose two.)

A. Test.prefix+Test.name
B. new Test().prefix+new Test().name
C. Test.prefix+Test.getName()
D. Test.getName+prefix
E. prefix+Test.name
F. prefix+name



Question # 5

Which statement about a functional interface is true? 

A. It must be defined with the public access modifier.
B. It must be annotated with @FunctionalInterface.
C. It is declared with a single abstract method.
D. It is declared with a single default method.
E. It cannot have any private methods and static methods.



Question # 6

Which two statements are true about the modular JDK? (Choose two.) 

A. The foundational APIs of the Java SE Platform are found in the java.base module.
B. An application must be structured as modules in order to run on the modular JDK.
C. It is possible but undesirable to configure modules’ exports from the command line.
D. APIs are deprecated more aggressively because the JDK has been modularized.



Question # 7

Which two statements are true about Java modules? (Choose two.) 

A. Modular jars loaded from --module-path are automatic modules.
B. Any named module can directly access all classes in an automatic module.
C. Classes found in –classpath are part of an unnamed module.
D. Modular jars loaded from –classpath are automatic modules.
E. If a package is defined in both the named module and the unnamed module, then thepackage in the unnamed module is ignored.



Question # 8

Given:List<String> longlist = List.of(“Hello”,”World”,”Beat”);List<String> shortlist = new ArrayList<>();Which code fragment correctly forms a short list of words containing the letter “e”?

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



Question # 9

Given:  Which two methods modify field values? (Choose two.)

A. setAllCounts
B. setACount
C. setGCount
D. setCCount
E. setTCount



Question # 10

Given:  Assume the file on path does not exist. What is the result?

A. The compilation fails.
B. /u01/work/filestore.txt is not deleted.
C. Exception
D. /u01/work/filestore.txt is deleted.



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