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Java Tutorial
BOSS QUIZ
10 questions · 5 minutes · pass at 70% to clear the track.
05:00
Start
Q1.
Streams are…
from Streams API
Eager collections
Lazy pipelines of operations
Threads
IO buffers only
Q2.
Collect a stream into a list with…
from Streams API
.collect(Collectors.toList()) or .toList()
.array()
.gather()
.into()
Q3.
A constructor has…
from Classes & Objects
No return type
A void return type
A Constructor return type
A this return type
Q4.
Most-used List implementation is…
from Collections Framework
LinkedList
ArrayList
Vector
Stack
Q5.
The entry point is…
from Intro
function main()
public static void main(String[] args)
fn main()
def main()
Q6.
A class is instantiated with…
from Classes & Objects
create
new
init
alloc
Q7.
Java compiles source to…
from Intro
Native code
Bytecode for the JVM
WebAssembly
C++
Q8.
Java memory is managed by…
from Intro
Manual free()
A garbage collector
RAII
Reference counting only
Q9.
Most-used Map implementation is…
from Collections Framework
HashMap
TreeMap
Hashtable
LinkedHashMap
Q10.
A class can implement…
from Inheritance
One interface
Many interfaces
No interfaces
Only abstract classes
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