3i Infotech Papers: Sample Questions 626 - 628 of 1245

Examrace Placement Series prepares you for the toughest placement exams to top companies.

Question number: 626

» Languages » C & C Plus Plus

MCQ▾

Question

  1. void main ()
  2. {
  3.     float j;
  4.     j = 1000 * 1000;
  5.     printf ( “%f”, j);
  6. }

Choices

Choice (4) Response

a.

Error

b.

Overflow

c.

1000000.000000

d.

All of the above

Answer

c.

Explanation

In the program

Table showing the program

Table showing the program

float j;

  • Define the float variable j

j = 1000 * 1000;

  • Here j = 1000 * 1000 = 1000000

printf (“%f”, j);

  • Print the value if j = 1000000.000000

Question number: 627

» Database » MySQL

Essay Question▾

Describe in Detail

What is Relational Calculus?

Explanation

  • Relational calculus is an query language which is non procedural, and instead of algebra it uses mathematical predicate calculus.

  • The relational calculus is not the same like that of differential and integral calculus in mathematics, but takes its name from a branch of symbolic logic termed as predicate calculus.

  • When applied to databases, it is found in two forms. These are

    • Tuple relational calculus which was originally proposed by Codd in the year 1972 and

    • Domain relational calculus which was proposed by Lacroix and Pirotte in the year 1977

Question number: 628

» Languages » C & C Plus Plus

Essay Question▾

Describe in Detail

What is a concrete class?

Explanation

  • A concrete class defines useful object that can be instantiated as an automatic variable on the program stack.

  • The implementation of a concrete class is defined.

  • It is not intended to be a base class.

  • Concrete is the default type of class such class can have direct instances.

  • A derived class that implements all the missing functionality is the concrete class in inheritance.

Image of the concrete classes

Image of the Concrete Classes

Given the image of concrete classes of shape class