JAVA interview question set 9

How to let junits know that they need to be run using PowerMock?

1 Mark(s)

@PowerMock
@RunWith(PowerMock)
@RunWith(Junits)
@RunWith(PowerMockRunner.class)

Which of these is not a mocking framework?

1 Mark(s)

EasyMock
Mockito
PowerMock
MockJava

Which of the below statement about JUnit is false?

1 Mark(s)

It is an open source framework
It provides an annotation to identify test methods
It provides test runners for running test
They cannot be run automatically

How to copy the file from one location to other?

1 Mark(s)

Files.copy(source, target)
Path.copy(source, target)
source.copy(target)
Files.createCopy(target)

Which of these is an correct way of defining generic class?

1 Mark(s)

class name(T1, T2, …, Tn) { /* … */ }
class name { /* … */ }
class name[T1, T2, …, Tn] { /* … */ }
class name{T1, T2, …, Tn} { /* … */ }

What is the purpose of BooleanSupplier function interface?

1 Mark(s)

represents supplier of Boolean-valued results
returns Boolean-valued result
There is no such function interface
returns null if Boolean is passed as argument

What is the substitute of Rhino javascript engine in Java 8?

1 Mark(s)

Nashorn
V8
Inscript
Narcissus

What does SAM stand for in the context of Functional Interface?

1 Mark(s)

Single Ambivalue Method
Single Abstract Method
Simple Active Markup
Simple Abstract Markup

What is Optional object used for?

1 Mark(s)

Optional is used for optional runtime argument
Optional is used for optional spring profile
Optional is used to represent null with absent value
Optional means it’s not mandatory for method to return object

Which method is used to verify the actual and expected results in Junits?

1 Mark(s)

assert()
equals()
==
isEqual()

How can we simulate if then behavior in Junits?

1 Mark(s)

if{..} else{..}
if(..){..} else{..}
Mockito.when(…).thenReturn(…);
Mockito.if(..).then(..);

How can we delete all files in a directory?

1 Mark(s)

Files.delete(path)
Directory.delete()
Directory.delete(path)

Which is the new method introduced in java 8 to iterate over a collection?

1 Mark(s)

for (String i : StringList)
foreach (String i : StringList)
StringList.forEach()
List.for()

JUnits are used for which type of testing?

1 Mark(s)

Unit Testing
Integration Testing
System Testing
Blackbox Testing

What does assertSame() method use for assertion?

1 Mark(s)

equals() method
isEqual() method
==
compare() method

What is the return type of lambda expression

1 Mark(s)

String
Object
void
Function

Which of the following is an incorrect statement regarding the use of generics and parameterized types in Java?

1 Mark(s)

Generics provide type safety by shifting more type checking responsibilities to the compiler
Generics and parameterized types eliminate the need for down casts when using Java Collections
When designing your own collections class (say, a linked list), generics and parameterized types allow you to achieve type safety with just a single class definition as opposed to defining multiple classes
All of the mentioned

Which of these type parameters is used for a generic class to return and accept a number?

1 Mark(s)

K
N
T
V

Which method is used to create a directory with fileattributes?

1 Mark(s)

Path.create()
Path.createDirectory()
Path.createDirectory()
Path.createDirectory()

Which of the below is an incorrect annotation with respect to JUnits?

1 Mark(s)

@Test
@BeforeClass
@Junit
@AfterEach

Which feature of java 8 enables us to create a work stealing thread pool using all available processors at its target?

1 Mark(s)

workPool
newWorkStealingPool
threadPool
workThreadPool

What are the two types of Streams offered by java 8?

1 Mark(s)

sequential and parallel
sequential and random
parallel and random
random and synchronized

Which of the following reference types cannot be generic?

1 Mark(s)

Anonymous inner class
Interface
Inner class
All of the mentioned

How can we get the size of specified file?

1 Mark(s)

Files.readAllLines()
Files.read()
Files.readFile()
Files.lines()

Which method can be used to check fileAccessiblity?

1 Mark(s)

isReadable(path)
isWritable(path)
isExecutable(path)
isReadable(path), isWritable(path), and isExecutable(path)

Which of the following is not introduced with Java 8?

1 Mark(s)

Stream API
Serialization
Spliterator
Lambda Expression

How can we create a symbolic link to file?

1 Mark(s)

createLink()
createSymLink()
createSymbolicLink()
createTempLink()

What is used to inject mock fields into the tested object automatically?

1 Mark(s)

@InjectMocks
@Inject
@InjectMockObject
@Mock

Which of these is not a mocking framework?

1 Mark(s)

EasyMock
Mockito
PowerMock
MockJava

What does Files.lines(Path path) do?

1 Mark(s)

It reads all the files at the path specified as a String
It reads all the lines from a file as a Stream
It reads the filenames at the path specified
It counts the number of lines for files at the path specified

JAVA interview question set 9 : Question 1 of 30