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最新下載的1Z0-819證照資訊,幫助妳輕松通過1Z0-819考試
1Z0-819證照資訊,1Z0-819認證考試解析,新版1Z0-819考古題,1Z0-819考題資源,1Z0-819測試引擎, 最新下載的1Z0-819證照資訊,幫助妳輕松通過1Z0-819考試

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>> 1Z0-819證照資訊 <<

1Z0-819認證考試解析,新版1Z0-819考古題

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Oracle 1Z0-819 考試大綱:

主題簡介
主題 1
  • Understand variable scopes, apply encapsulation and make objects immutable
  • Connect to and perform database SQL operations, process query results using JDBC API
主題 2
  • Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
  • Sort collections and arrays using Comparator and Comparable interfaces
主題 3
  • Create and use subclasses and superclasses, including abstract classes
  • Use local variable type inference, including as lambda parameters
主題 4
  • Handle text using String and StringBuilder classes
  • Utilize polymorphism and casting to call methods, differentiate object type versus reference type
主題 5
  • Create and use interfaces, identify functional interfaces
  • Initialize objects and their members using instance and static initialiser statements and constructors
主題 6
  • Define and use fields and methods, including instance, static and overloaded methods
  • Working with Arrays and Collections

最新的 Oracle Java SE 1Z0-819 免費考試真題 (Q82-Q87):

問題 #82
Given the code fragment:
var pool = Executors.newFixedThreadPool(5);
Future outcome = pool.submit(() > 1);
Which type of lambda expression is passed into submit()?

  • A. java.lang.Runnable
  • B. java.util.concurrent.Callable
  • C. java.util.function.Predicate
  • D. java.util.function.Function

答案:B


問題 #83
Given:

What is the result?

  • A. [A, B, C]
    [A, B, C]
  • B. [A, B, C]
    followed by an exception thrown on line 11.
  • C. On line 9, an exception is thrown at run time.
  • D. [A, B, C]
    [A, B]

答案:A

解題說明:


問題 #84
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.

答案:A

解題說明:


問題 #85
Given:

executed with this command:
java Main one two three
What is the result?

  • A. It creates an infinite loop printing:0). one1). two1). two...
  • B. The compilation fails.
  • C. 0). one
  • D. A java.lang.NullPointerException is thrown.
  • E. 0). one1). two2). three

答案:A


問題 #86
Given:

Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)

  • A. public ArrayList<Number> foo(Set<CharSequence> m) { ... }
  • B. public List<Integer> foo(Set<String> m) { ... }
  • C. public List<Integer> foo(Set<CharSequence> m) { ... }
  • D. public List<Object> foo(Set<CharSequence> m) { ... }
  • E. public List<Integer> foo(TreeSet<String> m) { ... }
  • F. public ArrayList<Integer> foo(Set<String> m) { ... }

答案:A,E


問題 #87
......

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1Z0-819認證考試解析: https://www.kaoguti.gq/1Z0-819_exam-pdf.html

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