C is a low level, general purpose, procedural programming language. It was initially developed for the purpose of creating Operating Systems and Compilers by Dennis Ritchie. C provides lots of features which includes low level access to the memory, easy to read keywords and procedural flow.
C++ is a combination of both high and low level programming language and is general purpose. It supports various ways of programming which includes: Object Oriented, Functional and Procedural. It is used for developing games, browsers and Operating Systems.
Question 1: Identify the correct identifier.
Explanation: Identifier name cannot start with numbers, it can only start
Question 2: What would be the output of the program below.
var = 1>2 ? 5<6 ? 2 : 3 : 6;
D) None of these
Answer: C) 6
Explanation: Let us break the problem into chunks and variables:
Question 3: printf(“%d”, 5|2);
Answer: C) 7
Explanation: It is a Bitwise OR operator between 5 and 2.
Question 4: What would be the output of the following program:
D) None of these
Answer: A) 1
Explanation: First of all, the expression inside the switch would be evaluated to 1.
Question 5: See below statements and choose the correct option.
Can we define a function inside a Structure?
Is the size of the union equal to the sum of size of all the data members?
A) Yes, Yes
B) No, No
C) Yes, No
D) No, Yes
Answer: B) No, No
Explanation: We cannot define a function inside a structure, we can do this inside a class.
Question 6: Which of the following is the default storage class?
Answer: B) Auto
Explanation: There is no storage class named “default”.
Question 7: Order of destructor is:
A) Same as the constructor
B) Opposite to constructor
C) Bottom to top
D) Both B and C
Answer: D) Both B and C
Explanation: Order of constructor is from top to bottom.
Question 8: What would be the output of the following code?
int a = ((5,6,7),(9,10,11));
Answer: D) 11
Explanation: Compiler is going to read the statement from left to right and will assign the last value it gets to the variable.
Question 9: Find the output of the following code:
int a = 10;
cout << a++ + a++ + ++a;
Answer: D) 34
Explanation: It is going to evaluate the statement from left to right.
Question 10: Evaluate following statements:
A) Friend function can access private members of a class.
B) Friend function has access to this pointer.
C) Entire class can be declared as friend of another class.
A) True, True, True
B) True, False, False
C) True, False, True
D) False, True, True
Answer: C) True, False, True
Explanation: Friend function can access all the data members (public, private and protected).