The command of a computer is mainly executed by
Answer: A
Correct answer: Arithmetic and logical unit
Executing a command means actually performing the operation it specifies, and that is the ALU's work. The control unit decides what shall be executed and when, but the execution itself happens in the ALU.
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In programming language COMAL, symbol of '//' is used instead of
Answer: A
Correct answer: remarks
In COMAL the double slash introduces a remark - a note for the reader that the compiler ignores - in place of the REM statement used by BASIC. C++ and Java later adopted the same marker.
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COMAL language statement '//PROGRAM : Input three numbers and print average//' shows
Answer: C
Correct answer: a program remark
The line is enclosed in the double slashes that mark a comment, and its content is a note describing what the program does. It declares nothing and computes nothing, which is what distinguishes a remark from a function or a variable.
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Computer programming language which is based on problems solved is called
Answer: C
Correct answer: high level programming language
A high level language lets the programmer express the problem in the terms of the problem itself - formulas, records, names - rather than in the terms of the machine. That is what problem oriented means, and it is the standard description of high level languages.
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Loop which is tested at least once in case condition does not fulfilled is classified as
Answer: D
Correct answer: REPEAT UNTIL loop
REPEAT … UNTIL tests its condition at the end of the body, so the body always runs at least once, even if the condition is already satisfied. A WHILE loop tests first and so may run no times at all.
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First component in algorithms is
Answer: C
Correct answer: sequence
Every algorithm is built from three constructs, and sequence - one step after another - is the first and simplest. Selection and repetition are added to it to give choice and looping.
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In programming language BASIC, area is calculated as
Answer: C
Correct answer: 100 Area=Width*Length
A BASIC statement begins with its line number, and assignment uses a plain equals sign: 100 Area=Width*Length. The := of the other options belongs to Pascal, and a statement without a line number would not be stored in the program.
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Program used for interactive computing is
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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All numbers including decimals are classified as
Answer: B
Correct answer: real numbers
In programming, real is the type that admits a fractional part, as against integer, which does not. Prime and composite are properties of integers rather than data types.
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Loop statement used in program to continue repetition until some condition is met is classified as
Answer: D
Correct answer: REPEAT UNTIL loop
REPEAT … UNTIL goes on repeating until the stated condition becomes true, which is the arrangement the question describes. A WHILE loop is expressed the other way round: it continues while a condition remains true.
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