C++ | MCQs

Explanation

In Ruby, the syntax for defining a method is:

def method_name(parameters)

  # method body

end

The 'def' keyword is used to define a method, followed by the method name and parameters in parentheses.

The method body is indented and enclosed by the 'end' keyword.

Explanation

• In C, the For loop is commonly used to iterate through an array because it allows for easy initialization, condition checking, and incrementing/decrementing of the loop counter.
• The syntax of a For loop is designed to handle array indexing and iteration naturally.

Explanation

The maximum value that can be stored in an "int" data type in C++ is 2147483647.

Explanation

• This is the standard SQL syntax to drop a column from a table.
• The ALTER TABLE statement is used to modify the structure of a table, and the DROP COLUMN clause is used to delete a column.
• An example: ALTER TABLE MyTable DROP COLUMN MyColumn;

Explanation

• The incorrect statement is: "The advantage is data flow representation".
• Data flow representation is actually a characteristic of Data Flow Diagrams (DFDs), which are used in Data Flow Design, a different software design methodology. DFDs show the flow of data through a system, whereas structural design focuses on the hierarchical structure of modules and their interfaces.

Explanation

Explanation

When you turn on your computer, it will check the control files:

• (Command.com) (Command Interpreter)
• io.sys (Input/Output System file)
• msdos.sys (MS-DOS System file)

Explanation

Vertex coloring is a way of assigning colors to the vertices of a graph such that:

• Any two adjacent vertices (connected by an edge) have different colors.
• The minimum number of colors is used.

This is also known as "proper vertex coloring" or "graph coloring".

It's a fundamental concept in graph theory, used to solve various problems in computer science, networking, and other fields.

Explanation

• A deterministic Turing machine can simulate a non-deterministic Turing machine without using extra time, but it may require more space.
• This is because a deterministic Turing machine can try all possible branches of a non-deterministic Turing machine in parallel, using more space to store the different branches.

Explanation

Machine language is the lowest-level programming language, consisting of binary code that a computer's processor can execute directly. The basic components of a machine language program are:

• Instructions: These are the fundamental commands that a computer's processor can execute, such as move data, perform arithmetic operations, jump to a location, etc. Instructions are represented as binary codes, such as 0s and 1s.