Operating System Architecture Set 23 MCQs

Q1 | Which of the following is true of all Perl scripts ?

meta characters are always preceded by a forward slash

perl statements are always followed by a period

parameters must always followed by period

perl statements are always followed by a semicolon

Q2 | Scalar variables

include string exclusively

are defied two discrete values

are the building blocks of more complicated data structure

always operate in the same manner as variable in algebric function

Q3 | Which of the following expression operators increments a varibale by one ?

..

.

**

*

Q4 | STDIN, or standard in, is a mechanism for

performing type conversion automatically

retrieving data from the user while a script is executing

prompting the user for specific information

outputting a string to standard out

Q5 | Perl is scripting language which is based on

inerpreter

compiler

assembler

all of the above

Q6 | Perl define scalar variable by

@

%

$

#

Q7 | What is the extension of the perl file ?

.p

.pl

.perl

.pe

Q8 | which is escape character in perl ?

//

!

\\

|

Q9 | comments are placed inside a perl program file using the character

@

%

$

#

Q10 | An array, in perl, is an

un-ordered list of scalar data

ordered list of scalar data

ordered list of numbers

none of the above

Q11 | The logical operator op1 && op2 means

performs a logical not of the operand

performs a logical or of the two operands

performs a logical and of the two operands

performs alogical and then or of the two operands

Q12 | Perl uses this <=> operator for

equal

comparision

less than or equal

greater than and equal

Q13 | Which of the following statements is NOT TRUE statements ?

perl chomp function will not remove all whitespace characters by default

perl chomp function returns the number of characters removed

perl chomp function checks whether the last character matches the input line separator and only then it deletes it.

it deletes the last ending varibale character regardless of whatever it is.

Q14 | Default file accessed through a print statement in perl is

stdin

stdout

stderr

all of these

Q15 | What is python ?

it is object oriented programming language

it is software package

it is intrpreter

it is assembly language

Q16 | In python, the list L contains the following elements : ['A', 1,'1','George']. Which of the following ways of slicing would assign only the first two elements to the variable X ?

l[1:2]

x=l[0:1]

x=[l[0:2]

none of the above

Q17 | //" in pyhon is

floor division operator

comment

new line

none of the above

Q18 | **" in python is an

exponentiation

address of

value redirection

none of the above

Q19 | In python, multi line string are given by

single quotes

double quotes

triple quotes

none of the above

Q20 | python source code file has an extension of

pys

py

src

none of the above

Q21 | which of the following translate and execute programe statements in sequence, instead of having separate translation and execution steps ?

procedure

interpreter

paradigm

compiler

Q22 | Which of the following procedure a true or false result ?

control structure

strong typing

data types

boolean express

Q23 | Which of the following language has an IF statement for making decision ?

perl chomp function will

c++

python

all of these

Q24 | Which of following language does not requires declarations ?

java

c++

python

vb.net

Q25 | Which of the following is not a valid data type in python ?

int

float

double

str