
IT Quiz Round 3
Authored by Neel (ÑËËĹ)
Computers
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Which of the following functions initializes the allocated memory to zero?
malloc()
calloc()
realloc()
free()
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
How do you declare a pointer to a function that returns int and takes float as an argument?
int (*fptr)(float);
float (*fptr)(int);
int fptr(float);
float fptr(int);
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What is the size of s1 in the following structure on a 32-bit system? struct test { char c; int i; short s; }s1;
7
8
12
10
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Which of the following causes a dangling pointer?
Using malloc() without free()
Returning the address of a local variable from a function
Dereferencing a NULL pointer
Using calloc() instead of malloc()
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What is the best approach to prevent deadlocks in Java?
Using multiple synchronized blocks on different objects
Always acquiring locks in the same order
Using wait() without notify()
Using busy-wait loops with Thread.sleep()
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Which of the following is NOT a feature of object-oriented programming in Java?
Abstraction
Encapsulation
Inheritance
Multithreading
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
How can you create an immutable class in Java?
By making all methods final
By making the class final and ensuring that fields are final and have no setters
By marking the class as abstract
By marking the class as private
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