IT &computer MCQ section 5 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (c)

A modem turns the digital data of a personal computer into modulated electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data.

Answer: (a)

The Control Unit, considered as the “Central nervous System” of a computer, obtains the instructions from the memory, interprets them and directs the operation of the computer.

It selects, interprets and monitors the execution of the program instructions by generating the timing and control signals.

Answer: (b)

Logical operators are mainly used to control program flow. And, Or, AndAlso, OrElse, and Xor are binary operators.

Answer: (c)

The Control Panel is a part of the Microsoft Windows graphical user interface which allows users to view and manipulate basic system settings and controls via applets, such as adding hardware, adding and removing software, controlling user accounts and changing accessibility options.

Answer: (b)

The Double class wraps a value of the primitive type double in an object. An object of type Double contains a single field whose type is double.

In addition, this class provides several methods for converting a double to a String and a String to a double, as well as other constants and methods useful when dealing with a double.