Q.1 If you wanted to process a stream of names, extract the male names, and store them in a new list, what is the appropriate operation to be used?
A. Both Stream.reduce and Stream.collect
B. Stream.collect
C. Stream.reduce
D. Stream.filter
Ans : Stream.collect
Q.2 Repeating annotations can be added with which of the following declarations?.
A. Declare just the repeatable annotation type
B. 1. Declare a repeatable annotation type
2. Declare the modifier annotation type
C. 1. Declare a repeatable annotation type
2. Declare the containing annotation type
D. None of the options
Ans : 1. Declare a repeatable annotation type
2. Declare the containing annotation type
Q.3 The terminal operation produces another stream as its output.
A. True
B. False
Ans : False
Q.4 Optional type validation can be used to substitute runtime validations.
A. True
B. False
Ans : False
Q.5 Repeating annotations can be retrieved using _________
A. getAnnotationsList()
B. getAnnotations()
C. getAnnotationsByType()
D. getAnnotationsByValue()
Ans : getAnnotationsByType()
Q.6 On which of these can annotations be used on in Java 8?
A. Local variables
B. Super classes
C. Generic types
D. All the options
Ans : All the options
Q.7 Type annotation is used to depict the non-blank string value _________
A. @NotBlank
B. @NotEmpty
C. @NonBlank
D. None of the options
Ans : @NotBlank
Q.8 LocalDate date1 = LocalDate.now();
LocalDate date2 = date1.plus(1, ChronoUnit.MONTHS);
Period period = Period.between(date2, date1);
System.out.println(“Period: ” + period);
Choose the correct output.
A. Compilation error
B. Period: P-1M
C. Period: 1
D. Runtime error
Ans : Period: P-1M
Q.9 Which method is used to connect the consumer to the source in reactive programming?
A. connectTo()
B. subscribe()
C. subscribeTo()
D. connect()
Ans : subscribe()
Q.10 The method used to fetch the parameter types using method parameter reflection is _________.
A. getParameterizedTypes()
B. getTypeParam()
C. getParamType()
D. getParameterizedType()
Ans : getParameterizedType()
Q.11 Which of these should be used to show package-level and class-level dependencies of Class files in Java 8?
A. dep
B. jdeps
C. ideps
D. jdep
Ans : jdeps
Q.12 Which of the following methods preserve parameter names in Java bytecode (through reflection API)?
A. All public methods
B. All methods
C. specify -parameters during compilation
D. specify -params during compilation
Ans : All public methods
Q.13 Reactive Programming deals with ____________.
A. Synchronous data
B. Asynchronous data
C. Both the options
D. None of the options
Ans : Asynchronous data
Q.14 Identify the intermediate and terminal operations in the code.
double average = roster
.stream()
.filter(p -> p.getGender() == Person.Sex.MALE)
.mapToInt(Person::getAge)
.average()
.getAsDouble();
A. Intermediate: filter, mapToInt Terminal: average
B. Intermediate: filter Terminal: mapToInt, average
C. Intermediate:average Terminal: filter, mapToInt
D. Intermediate: filter, mapToInt Terminal: getAsDouble
Ans : Intermediate: filter, mapToInt Terminal: average
