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1Z1-816 PDF DEMO:

QUESTION NO: 1
Which three annotation uses are valid? (Choose three.)
A. Function<String, String> func = (@NonNull x) -> x.toUpperCase();
B. var v = "Hello" + (@Interned) "World"
C. var myString = (@NonNull String) str;
D. var obj = new @Interned MyObject();
E. Function<String, String> func = (@NonNull var x) -> x.toUpperCase();
F. Function<String, String> func = (var @NonNull x) -> x.toUpperCase();
Answer: A,D,F

QUESTION NO: 2
Which code fragment prints 100 random numbers?
A. Option A
B. Option D
C. Option C
D. Option B
Answer: B
Reference:
https://www.javacodegeeks.com/2014/01/java-util-random-in-java-8.html

QUESTION NO: 3
Which is a proper JDBC URL?
A. http://localhost.mysql.com:3306/database
B. jdbc:mysql://localhost:3306/database
C. http://localhost mysql.jdbc:3306/database
D. jdbe.mysql.com://localhost:3306/database
Answer: B
Reference:
https://vladmihalcea.com/jdbc-driver-connection-url-strings/

QUESTION NO: 4
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 B
B. Option A
C. Option D
D. Option C
Answer: D

QUESTION NO: 5
Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?
A. [Peter, 30, Market Road]
B. An exception is thrown at run time.
C. [Peter, 25, null, 1000]
D. [Market Road, 1000]
Answer: B
Explanation:

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Updated: May 28, 2022