IT &computer MCQ section 5 MCQ Questions & Answers Detailed Explanation

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.

Answer: (d)

Windows NT is designed for multi-processor systems. It supports symmetrical multiprocessing which enables multiple microprocessors to be productive at all times, increasing the overall system throughput and taking advantage of available processing power. Multiprocessing enables multiple tasks or applications to run in parallel on different microprocessors.

Personal workstations are designed to operate with more than one microprocessor in order to take advantage of the multiprocessing capabilities of Windows NT (The GIS Book by G.B. Corte)

Answer: (d)

Concatenation is the process of appending one string to the end of another string. When we concatenate string literals or string constants by using the + operator, the compiler creates a single string. No run time concatenation occurs.

However, string variables can be concatenated only at run time.

Answer: (b)

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

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: (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.