A number that is used to control the form of another number is known as
Answer: B
Correct answer: Mask
A mask is a bit pattern combined with another value to control its form: ANDing with a mask clears the bits that are 0 in it, ORing sets the bits that are 1, and XORing inverts them. It is how individual flags are read and written inside a word.
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Who is regarded as the father of the computer for designing the Analytical Engine ?
Answer: C
Correct answer: Charles Babbage
Babbage designed the Analytical Engine in the 1830s with a mill, a store and punched-card input, anticipating the structure of a modern computer. It was never completed in his lifetime, and Ada Lovelace’s notes on it describe what is regarded as the first algorithm written for a machine.
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What are the basic operations which are performed by a computer?
Answer: D
Correct answer: All the above
A computer performs arithmetic operations in its ALU, logical operations such as comparison, and the movement and storage of data between memory and registers. Every task it carries out is built from these basic operations, so the combined option is correct.
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Who invented Linux operating system ?
Answer: C
Correct answer: Linus Torvalds
Linus Torvalds, then a student in Helsinki, wrote the Linux kernel and announced it in 1991, releasing it under the GNU General Public License so that anyone could use and improve it. Dennis Ritchie created C and co-created Unix; Steve Jobs co-founded Apple.
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The time for which a piece of equipment operates is called
Answer: B
Correct answer: Effective time
Effective time is the portion of the scheduled time during which a piece of equipment is actually operating and doing useful work - as against the idle and down time that make up the rest. Access and seek times measure how quickly storage responds, not how long the machine runs.
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Which is a non-standard version of a computing language?
Answer: C
Correct answer: Army
PROLOG, APL and PL/1 are all defined by published standards. Army is not a standard language, so among these it is the non-standard version.
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The errors that can be pointed out by the compiler are
Answer: B
Correct answer: Syntax errors
A compiler checks the program against the grammar of the language, so it catches syntax errors - a missing semicolon, an unmatched bracket, an undeclared name - and refuses to produce code until they are fixed. A logical error breaks no rule of the language: the program compiles and runs, but computes the wrong thing, and only testing reveals it.
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A technique used by codecs to convert an analog signal into a digital bit stream is known as
Answer: A
Correct answer: Pulse code modulation
PCM converts an analogue waveform to digital in three steps: the signal is sampled at a fixed rate, each sample is quantised to the nearest of a set of levels, and the level is written as a binary number. Sampling above twice the highest frequency present - the Nyquist rate - allows the original to be reconstructed; telephone speech is sampled at 8 kHz with 8 bits, giving 64 kbps.
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Which among following is odd one ?
Answer: B
Correct answer: Hub
Spyware, malware and viruses are all hostile software. A hub is a piece of networking hardware - a simple device that repeats an incoming signal to every other port - so it is the odd one out.
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How many values can be represented by a single byte ?
Answer: D
Correct answer: 256
A byte is eight bits, and each bit can independently be 0 or 1, so the number of distinct patterns is \[ 2^8 = 256 \] - the values 0 to 255 if the byte is read as an unsigned number.
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