How many bits make one nibble?
- A.2 bits
- B.4 bits
- C.8 bits
- D.16 bits
Correct answer
Explanation
The correct answer is B, 4 bits. A bit is the smallest unit of data, holding a single binary 0 or 1. Four bits together form a nibble, which is exactly half a byte, and a nibble is convenient because it maps neatly to one hexadecimal digit.
Option A, 2 bits, corresponds to no standard named unit. Option C, 8 bits, is a byte, the amount of memory needed to store one character, and it is the commonest distractor here because students remember the two units together. Option D, 16 bits, is often called a word on some machines, but word length varies with the processor and is not a fixed unit like the nibble. Above the byte the ladder rises in multiples of 1024: kilobyte, megabyte, gigabyte, terabyte, petabyte, exabyte, zettabyte and yottabyte. Learn the pair nibble four, byte eight together and read the question word carefully.
Read the full article: Basics of Computers and Generations: Parts, Memory and MCQs
Practice Questions
View allWho is known as the Father of the Computer?
- A.Blaise Pascal
- B.Charles Babbage
- C.Alan Turing
- D.Herman Hollerith
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He designed the Difference Engine and then the Analytical Engine, and the Analytical Engine contained the logical parts of a modern computer: a store for holding numbers, a mill for calculating, punched-card input and a printed output.
Read the full explanation →Vacuum tubes were used as the main electronic component in which generation of computers?
- A.First generation
- B.Second generation
- C.Third generation
- D.Fourth generation
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Machines such as ENIAC, EDVAC and UNIVAC-I ran on thousands of vacuum tubes, which made them enormous, power-hungry and dependent on constant cooling.
Read the full explanation →The transistor, which defined second-generation computers, was invented at which laboratory?
- A.Texas Instruments
- B.Intel Corporation
- C.Bell Laboratories
- D.IBM Research
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John Bardeen, Walter Brattain and William Shockley demonstrated the transistor there in 1947, and the three shared the Nobel Prize in Physics for it.
Read the full explanation →Which of the following is regarded as the first commercially available electronic computer?
- A.ENIAC
- B.EDVAC
- C.Harvard Mark I
- D.UNIVAC-I
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It was the first electronic computer built to be sold to customers rather than used only in a laboratory, and it was famously put to work on census and business data processing.
Read the full explanation →In which year was the Intel 4004, the first commercial microprocessor, introduced?
- A.1964
- B.1971
- C.1975
- D.1981
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The Intel 4004 placed an entire processing unit on a single chip for the first time in a commercial product, and that step marks the beginning of the fourth generation of computers, built on very large scale integration.
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