Computer Fundamental Miscellaneous - Study Mode
[#496] A computer has a 1024K memory. What does the letter K stand for
Correct Answer
(C) 1024
Explanation
Solution: In decimal systems, kilo stands for 1,000, but in binary systems, a kilo is 1,024 (2 to the 10th power). Technically, therefore, a kilobyte is 1,024 bytes, but it is often used loosely as a synonym for 1,000 bytes. For example, a computer that has 256K main memory can store approximately 256,000 bytes (or characters) in memory at one time. A megabyte is 2 to the 20th power (approximately 1 million) and a gigabytes 2 to the 30th power (approximately 1 billion). In computer literature, a kilobyte is usually abbreviated as K or KB. To distinguish between a decimal K (1,000) and a binary K (1,024), the IEEE has suggested following the convention of using a small k for a decimal kilo and a capital Kfor a binary kilo, but this convention is by no means strictly followed. Source : webopedia.com
[#497] Computer instructions written with the use of English words instead of binary machine code is called
Correct Answer
(B) Symbolic code
Explanation
Solution: Computer instructions written with the use of English words instead of binary machine code is called Symbolic code.
[#498] The system unit of a personal computer typically contains all of the following except:
Correct Answer
(D) modem
Explanation
Solution: A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves.
[#499] Which of the following are the two main components of the CPU?
Correct Answer
(C) control unit and ALU
Explanation
Solution: Control Unit (CU) : The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor. It tells the computer's memory, arithmetic/logic unit and input and output devices how to respond to the instructions that have been sent to the processor. ALU (Arithmetic logic unit) : An arithmetic logic unit is a combinational digital electronic circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point unit, which operates on floating point numbers.
[#500] A characteristic of card systems is:
Correct Answer
(D) all the above
Explanation
Solution: A characteristic of card systems is slowness in processing data, using cards as records of transactions, needing a larger DP staff.