1z0-829 — Free Practice Questions
10 free sample questions from a bank of 66, with the correct answers and explanations. No signup required — start practising right now.
1Given the code fragment: and Which is true?
- The program prints t1 : 1 : t2 : 1: t1 : 2 : t2 : 2 : in random order.
- The program prints t1 : 1 : t2 : 1: t1 : 2 : t2 : 2 :
- The program prints t1 : 1 : t2 : 1: t1 : 1 : t2 : 1 : indefinitely.
- The program prints an exception.
Answer: A
2Given: What is the result?
- Compilation fails.
- there
- hello
- A NumberFormatException is thrown.
Answer: C
3Given the code fragment: Which set of class definitions compiles?
- interface Story extends SInt {} interface Art extends SInt {}
- public interface Story extends SInt {} public interface Art extends SInt {}
- sealed interface Story extends SInt {} non-sealed class Art implements SInt {}
- non-sealed interface Story extends SInt {} non-sealed interface Art extends SInt {}
- non-sealed interface Story extends SInt {} class Art implements SInt {}
Answer: D
4Given the code fragment: What is the result?
- ABBCDE // the order of elements is unpredictable
- ABCDE
- ABCDE // the order of elements is unpredictable
- ADEABCB // the order of elements is unpredictable
Answer: C
5Which statement is true about modules?
- Only unnamed modules are on the module path.
- Automatic and named modules are on the module path.
- Only automatic modules are on the module path.
- Only named modules are on the module path.
- Automatic and unnamed modules are on the module path.
Answer: B
6Given the code fragment: Which code at line n1, obtains the java.io.Console object?
- Console console = Console.getInstance();
- Console console = System.console();
- Console console = new Console(System.in);
- Console console = new Console(new InputStreamReader(System.in));
- Console console = System.console(System.in);
Answer: B
7Given the content of the in.txt file:
0123456789
and the code fragment: What is the content of the out.txt file?
- 012345678
- 01234567801234
- 01234567
- 0123456789
- 012345678901234
- 0123456789234567
Answer: F
8Which statement is true?
- IllegalStateException is thrown if a thread in waiting state is moved back to runnable.
- A thread in waiting state consumes CPU cycles.
- After the timed wait expires, the waited thread moves to the terminated state.
- A thread in waiting state must handle InterruptedException.
Answer: D
9Given the code fragment:
List listOfNumbers = List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Which code fragment returns different values?
- int sum = listOfNumbers.stream().reduce(0, Integer::sum) + 5;
- int sum = listOfNumbers.parallelStream().reduce(0, Integer::sum) + 5 ;
- int sum = listOfNumbers.parallelStream().reduce((m, n) -> m + n).orElse(5) + 5;
- int sum = listOfNumbers.parallelStream().reduce(5, Integer::sum);
- int sum = listOfNumbers.stream().reduce(5, (a, b) -> a+ b);
Answer: D
10Given the code fragment: Which two statements at Line n1 independently enable you to print 1250? (Choose two.)
- Integer res = 250 + Integer.parseInt(s);
- Integer res = 250 + Integer.valueOf(s);
- Integer res = 250 + s2;
- Integer res = 250; res =+ s2;
- Integer res = 250 + s;
- Integer res = 250 + Integer(s2);
Answer:
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