Computer Languages Questions and Answers

Q: Program used for interactive computing is

Correct answer: interpreterAn interpreter translates and executes a program a statement at a time, so a change can be tried immediately without a compile step - which is what makes it the tool for interactive computing. A compiler must process the whole program before any of it can run.

Q: Word or set of letters that can be used to represent a specific function and are easily memorable is classified as

Correct answer: mnemonicsA mnemonic is a short group of letters chosen to be easy to remember and standing for a particular operation - ADD, SUB, JMP. Symbolic addresses name locations rather than functions.

Q: Group of all special characters such as digits and letters are classified as

Correct answer: stringsA sequence of characters - letters, digits and symbols alike - treated as a single value is a string. The distinction that matters is that the digits in a string are characters, not numbers to be calculated with.

121.

In the carrier sense network, if prevailing condition is a 'channel busy', then technique used is

A.non-persistent then it results in randomised wait and sense
B.1-persistent then the channel is continually sensed
C.p-persistent then randomised retransmission is done
D.both (a) and (b)

Answer: B

Correct answer: 1-persistent then the channel is continually sensed

Under 1-persistent CSMA a station that finds the channel busy keeps listening and transmits the instant it goes idle, with probability 1. Non-persistent CSMA waits a random time before sensing again, and p-persistent transmits with probability p once the channel clears.

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122.

Program used for interactive computing is

A.executor
B.instructor
C.translator
D.interpreter

Answer: D

Correct answer: interpreter

An interpreter translates and executes a program a statement at a time, so a change can be tried immediately without a compile step - which is what makes it the tool for interactive computing. A compiler must process the whole program before any of it can run.

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123.

Word or set of letters that can be used to represent a specific function and are easily memorable is classified as

A.mechanics
B.mnemonics
C.lined addresses
D.symbolic addresses

Answer: B

Correct answer: mnemonics

A mnemonic is a short group of letters chosen to be easy to remember and standing for a particular operation - ADD, SUB, JMP. Symbolic addresses name locations rather than functions.

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124.

Group of all special characters such as digits and letters are classified as

A.strings
B.odd numbers
C.even numbers
D.negative numbers

Answer: A

Correct answer: strings

A sequence of characters - letters, digits and symbols alike - treated as a single value is a string. The distinction that matters is that the digits in a string are characters, not numbers to be calculated with.

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