Multiple Choice Questions - MCQs from C++ set - 4

Question 1

In an assignment statement
a=b;
Which of the following statement is true?

a.    The variable a and the variable b are equal.

b.    The value of b is assigned to variable a but the later changes on variable b will not effect the value of variable a

c.    The value of b is assigned to variable a and the later changes on variable b will effect the value of variable a

d.    The value of variable a is assigned to variable b and the value of variable b is assigned to variable a.

Question 2

All of the following are valid expressions in C++
a  =  2 + (b = 5);
a  = b = c = 5;
a  = 11 % 3

a.    True

b.    False

Question 3:

To increase the value of c by one which of the following statement is wrong?

a.    c++;

b.    c = c + 1;

c.    c + 1 => c;

d.    c += 1

Question 4:

When following piece of code is executed, what happens?
b = 3;
a = b++;

a.    a contains 3 and b contains 4

b.    a contains 4 and b contains 4

c.    a contains 4 and b contains 3

d.    a contains 3 and b contains 3

Question 5:

The result of a Relational operation is always

a.    either True or False

b.    is less than or is more than

c.    is equal or less or more

d.    All of these

Question 6:

Which of the following is not a valid relational operator?

a.    ==

b.    =>

c.    >=

d.    >=

Question 7:

What is the final value of x when the code int x; for(x=0; x<10; x++) {} is run?

A. 10

B. 9

C. 0

D. 1

Question 8:

When does the code block following while(x<100) execute?

A. When x is less than one hundred

B. When x is greater than one hundred

C. When x is equal to one hundred

D. While it wishes

Question 9:

Which is not a loop structure?

A. for

B. do while

C. while

D. repeat until

Question 10:

How many times is a do while loop guaranteed to loop?

A. 0

B. Infinitely

C. 1

D. Variable

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ANSWERS

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1.    b. The value of b is assigned to variable a but the later changes on variable b will not effect the value of variable a
2.    a. True
3.    c. c + 1 => c;
4.    a. a contains 3 and b contains 4
5.    a. either True or False
6.    b. =>
7.    A. 10
8.    A. When x is less than one hundred
9.    D. Repeat Until
10.    C. 1