Group of all special characters such as digits and letters are classified as
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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In programming a single instruction is classified as
Answer: A
Correct answer: statement
A single instruction in a program is a statement. Several statements together make a block or a routine, but the unit itself is the statement.
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Program style and must be written in
Answer: D
Correct answer: all of the above
All three are aspects of the same requirement: a program is read and altered far more often than it is written, so it must be well structured, understandable to someone who did not write it, and easy to change without breaking.
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In line 100 INPUT NUM: PRINT 3.1*NUM*NUM+5" of a BASIC program, ' PRINT 3.1 and 5' are classified as
Answer: A
Correct answer: constants
The numbers 3.1 and 5 written directly into the expression are literal constants: their values are fixed in the program text and cannot change while it runs. NUM, by contrast, is a variable, since the INPUT statement gives it whatever the user types.
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A program which translates high level program into machine code is classified as
Answer: A
Correct answer: compiler
A compiler translates a whole high level program into machine code before it is run. Translator is the general term covering compilers, interpreters and assemblers, so it is less precise than the answer the question wants.
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If element in array has two subscripts, then array has
Answer: B
Correct answer: two dimension
The number of subscripts is the number of dimensions: A(3) selects one element of a list, A(3,4) a row and a column of a table. Two subscripts therefore mean a two-dimensional array.
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Names used to identify a specific location and are invented by programmers are called
Answer: B
Correct answer: symbolic addresses
In assembly language a programmer gives a memory location a name of his own choosing - a label - and the assembler works out the actual address. Such names are symbolic addresses. Mnemonics, by contrast, stand for operations rather than for locations.
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In line "300 INPUT NUM: PRINT 4.2*NUM*NUM+17" of a BASIC program, '300' is
Answer: C
Correct answer: line number
In BASIC every statement begins with a number that fixes its place in the program and gives GOTO and GOSUB something to refer to. That is the line number; it is not a variable and holds no value.
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In JMP PRNT command, JMP and PRNT respectively are classified as
Answer: D
Correct answer: mnemonics and symbolic addresses
JMP is the short form of an operation, which makes it a mnemonic; PRNT is a label the programmer has attached to a location, which makes it a symbolic address. Every assembly instruction has this shape: an operation followed by what it operates on.
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Statement in Comal language 'IF age >=18 THEN PRINT "Yes" ELSE PRINT "No" is an example of
Answer: D
Correct answer: if then else statement
The statement has all three keywords and both branches: a condition after IF, one action after THEN and another after ELSE. An if then statement would have only the first branch.
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