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Java Quiz Day 32
Question 1
Why are generics used in Java?
- A
To increase file size
- B
For backward compatibility
- C
For compile-time type safety
- D
For runtime type detection
Question 2
Which syntax correctly defines a generic class?
- A
class Test
{} - B
generic class Test {}
- C
class
Test {} - D
Test
class {}
Question 3
What is the output of this code?
class Box<T> {
T value;
void set(T val) { value = val; }
T get() { return value; }
}
- A
Compilation error
- B
Generic class Box
- C
Box with fixed type
- D
None of the above
Question 4
Which is a benefit of using generics in Java?
- A
Slower execution
- B
Manual type casting
- C
Type safety and code reusability
- D
Runtime type checks
Question 5
Which of the following is a valid generic method declaration?
- A
public void print(T t)
- B
public
void print(T t) - C
public T print(T t)
- D
void
print(T t)
Question 6
Generics work only with which type of data?
- A
Primitive types
- B
Reference types
- C
Static data
- D
Enums only
There are 6 questions to complete.