Which operator is used for object reference comparison in Java?
Anonymous Poll
50%
==
29%
.equals()
14%
compareTo()
7%
===
Which interface is implemented by all collection classes in Java?
Anonymous Poll
29%
Iterable
18%
Serializable
47%
Collection
6%
Comparable
You need thread-safe operations in a Map. Which implementation will you choose?
Anonymous Poll
30%
HashMap
29%
LinkedHashMap
27%
ConcurrentHashMap
14%
TreeMap
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💻 Backend First or Frontend First?
Anonymous Poll
64%
👉 Backend
36%
👉 Frontend
2
You want to restrict object creation to only one instance in a class. Which pattern will you use?
Anonymous Poll
5%
Factory
76%
Singleton
12%
Builder
7%
Prototype
For career growth as a fresher, what’s most helpful?
Anonymous Poll
21%
Having a mentor
27%
Networking with seniors
6%
Attending workshops
46%
Self-learning & practice
What will be the default value of a boolean variable in a Java class?
Anonymous Poll
27%
true
58%
false
14%
null
0%
Compiler Error
Which of the following is not a valid access modifier in Java?
Anonymous Poll
2%
public
6%
private
2%
protected
90%
extern
1
You have an array of numbers and want to print only even numbers. Which approach is correct?
Anonymous Poll
85%
Use for loop and check num % 2 == 0
2%
Use if num = 2
8%
Use while num % 2
5%
Use switch-case
You are reading a file but it may not exist. What should you do?
Anonymous Poll
4%
Ignore the error
36%
Use try-catch
58%
Use if file.exists() only
2%
Program will automatically handle it
You want to store multiple unique values in Java. Which collection is best?
Anonymous Poll
31%
ArrayList
56%
HashSet
13%
LinkedList
0%
Queue
1