Tag: programming languages

Questions Related to programming languages

By default, PROC FREQ creates a table of frequencies and percentages for which data set variables?
technology programming languages

  1. Character variables

  2. Numeric Variables

  3. Both Numeric & Character Variables.

  4. None : Variable names must be specified.

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Correct Option: C

Data asthma; input city Asthma count; datalines; 1 1 35 1 0 65 2 1 40 2 0 60 3 1 25 3 0 75 ; run; proc format; value asth 0= 'No Asthma' 1= 'Asthma' ; run; Which of the following code produce the output : Asthma Frequency Percent ---------------------------------- Asthma 100 33.33 No Asthma 200 66.67
technology programming languages

  1. proc freq data=asthma ; weight count; tables asthma / nocum; format asthma asth.; run;

  2. proc freq data=asthma order = formatted ; weight count; tables asthma / nocum; format asthma asth.; run;

  3. proc freq data=asthma order = formatted ; weight count; tables asthma ; format asthma asth.; run;

  4. proc freq data=asthma order = formatted ; tables asthma / nocum; format asthma asth.; run;

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Correct Option: B

What will be printed? use strict; my @a = (1, 2, 3); my %b = (2 => undef); for my $val (@a) { last if $b{$val}; } print $val;

technology programming languages

  1. undef

  2. 0

  3. 1

  4. 2

  5. the code is ill-formed

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Correct Option: E

What will be the value of $str after execution of the following code? my $str = '112133'; $str =~ s/(.)\1/$1/g;
technology programming languages

  1. 112133

  2. 1233

  3. 1213

  4. 12133

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Correct Option: C

my $val = 'x'; print ref($val); What is the output?
technology programming languages

  1. SCALAR

  2. empty value

  3. STRING

  4. not a reference

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Correct Option: B

What is the value of $match? my $txt = 'I am learning Perl'; my ($match) = $txt =~ /\s(.*)\s/;
technology programming languages

  1. am learning

  2. I am learning Perl

  3. learning

  4. am

  5. none

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Correct Option: A

The $_ variable
technology programming languages

  1. holds the last pattern matched.

  2. holds the output field separator.

  3. identifies the current command line argument.

  4. none of the above is correct.

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Correct Option: C

What is Perl?
technology programming languages

  1. Practical Extraction and Report Language

  2. Practice for Exclusive and Report Language

  3. Practical Extraction and Report Learning

  4. Practical Exclusive and Report Language

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Correct Option: A

The value of the expression $yards += 10
technology programming languages

  1. is 10

  2. is true.

  3. cannot be determined from the information given.

  4. relies on which command line arguments were used.

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Correct Option: C

Which of the following commands will turn a scalar ($str)into an array of characters?
technology programming languages

  1. @a = split($str).

  2. @a = split(/\s/, $str).

  3. This task can be done in Perl but none of the above commands do it.

  4. @a = split(/./, $str).

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Correct Option: C