McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) .
| 551. |
Which of the following is true of all Perl scripts ? |
| A. | meta characters are always preceded by a forward slash |
| B. | perl statements are always followed by a period |
| C. | parameters must always followed by period |
| D. | perl statements are always followed by a semicolon |
| Answer» D. perl statements are always followed by a semicolon | |
| 552. |
Scalar variables |
| A. | include string exclusively |
| B. | are defied two discrete values |
| C. | are the building blocks of more complicated data structure |
| D. | always operate in the same manner as variable in algebric function |
| Answer» C. are the building blocks of more complicated data structure | |
| 553. |
Which of the following expression operators increments a varibale by one ? |
| A. | .. |
| B. | . |
| C. | ** |
| D. | * |
| Answer» B. . | |
| 554. |
STDIN, or standard in, is a mechanism for |
| A. | performing type conversion automatically |
| B. | retrieving data from the user while a script is executing |
| C. | prompting the user for specific information |
| D. | outputting a string to standard out |
| Answer» B. retrieving data from the user while a script is executing | |
| 555. |
Perl is scripting language which is based on |
| A. | inerpreter |
| B. | compiler |
| C. | assembler |
| D. | all of the above |
| Answer» A. inerpreter | |
| 556. |
Perl define scalar variable by |
| A. | @ |
| B. | % |
| C. | $ |
| D. | # |
| Answer» C. $ | |
| 557. |
What is the extension of the perl file ? |
| A. | .p |
| B. | .pl |
| C. | .perl |
| D. | .pe |
| Answer» B. .pl | |
| 558. |
which is escape character in perl ? |
| A. | // |
| B. | ! |
| C. | \\ |
| D. | | |
| Answer» C. \\ | |
| 559. |
comments are placed inside a perl program file using the character |
| A. | @ |
| B. | % |
| C. | $ |
| D. | # |
| Answer» D. # | |
| 560. |
An array, in perl, is an |
| A. | un-ordered list of scalar data |
| B. | ordered list of scalar data |
| C. | ordered list of numbers |
| D. | none of the above |
| Answer» B. ordered list of scalar data | |
| 561. |
The logical operator op1 && op2 means |
| A. | performs a logical not of the operand |
| B. | performs a logical or of the two operands |
| C. | performs a logical and of the two operands |
| D. | performs alogical and then or of the two operands |
| Answer» C. performs a logical and of the two operands | |
| 562. |
Perl uses this <=> operator for |
| A. | equal |
| B. | comparision |
| C. | less than or equal |
| D. | greater than and equal |
| Answer» B. comparision | |
| 563. |
Which of the following statements is NOT TRUE statements ? |
| A. | perl chomp function will not remove all whitespace characters by default |
| B. | perl chomp function returns the number of characters removed |
| C. | perl chomp function checks whether the last character matches the input line separator and only then it deletes it. |
| D. | it deletes the last ending varibale character regardless of whatever it is. |
| Answer» D. it deletes the last ending varibale character regardless of whatever it is. | |
| 564. |
Default file accessed through a print statement in perl is |
| A. | stdin |
| B. | stdout |
| C. | stderr |
| D. | all of these |
| Answer» B. stdout | |
| 565. |
What is python ? |
| A. | it is object oriented programming language |
| B. | it is software package |
| C. | it is intrpreter |
| D. | it is assembly language |
| Answer» A. it is object oriented programming language | |
| 566. |
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 ? |
| A. | l[1:2] |
| B. | x=l[0:1] |
| C. | x=[l[0:2] |
| D. | none of the above |
| Answer» C. x=[l[0:2] | |
| 567. |
"//" in pyhon is |
| A. | floor division operator |
| B. | comment |
| C. | new line |
| D. | none of the above |
| Answer» A. floor division operator | |
| 568. |
"**" in python is an |
| A. | exponentiation |
| B. | address of |
| C. | value redirection |
| D. | none of the above |
| Answer» A. exponentiation | |
| 569. |
In python, multi line string are given by |
| A. | single quotes |
| B. | double quotes |
| C. | triple quotes |
| D. | none of the above |
| Answer» C. triple quotes | |
| 570. |
python source code file has an extension of |
| A. | pys |
| B. | py |
| C. | src |
| D. | none of the above |
| Answer» B. py | |
| 571. |
which of the following translate and execute programe statements in sequence, instead of having separate translation and execution steps ? |
| A. | procedure |
| B. | interpreter |
| C. | paradigm |
| D. | compiler |
| Answer» B. interpreter | |
| 572. |
Which of the following procedure a true or false result ? |
| A. | control structure |
| B. | strong typing |
| C. | data types |
| D. | boolean express |
| Answer» D. boolean express | |
| 573. |
Which of the following language has an IF statement for making decision ? |
| A. | perl chomp function will |
| B. | c++ |
| C. | python |
| D. | all of these |
| Answer» D. all of these | |
| 574. |
Which of following language does not requires declarations ? |
| A. | java |
| B. | c++ |
| C. | python |
| D. | vb.net |
| Answer» C. python | |
| 575. |
Which of the following is not a valid data type in python ? |
| A. | int |
| B. | float |
| C. | double |
| D. | str |
| Answer» C. double | |
| 576. |
How do you find out what's your shell ? |
| A. | echo $shell |
| B. | echo $shell |
| C. | echo $shell |
| D. | echo shell |
| Answer» A. echo $shell | |
| 577. |
What is command to find out todays date ? |
| A. | time |
| B. | date |
| C. | cal |
| D. | cd |
| Answer» B. date | |
| 578. |
What's the command to find out users on the system ? |
| A. | who |
| B. | whoami |
| C. | user |
| D. | pwd |
| Answer» A. who | |
| 579. |
How do you find current directory you are in ? |
| A. | cd |
| B. | pwd |
| C. | chdir |
| D. | mkdir |
| Answer» B. pwd | |
| 580. |
Which variable contains current shell process id ? |
| A. | $* |
| B. | $? |
| C. | $$ |
| D. | $! |
| Answer» C. $$ | |
| 581. |
Which command is used to debug a shell script program ? |
| A. | set |
| B. | set -x |
| C. | debug |
| D. | db |
| Answer» B. set -x | |
| 582. |
How do you remove a file ? |
| A. | del |
| B. | rm |
| C. | cd |
| D. | rmdir |
| Answer» B. rm | |
| 583. |
How do you find your own username ? |
| A. | who |
| B. | user |
| C. | whoami |
| D. | root |
| Answer» C. whoami | |
| 584. |
Which of the following display content of file1 ? |
| A. | cat file1 |
| B. | cat > file1 |
| C. | cat >> file2 |
| D. | cat |
| Answer» A. cat file1 | |
| 585. |
Which of the following creates a file named file1 ? |
| A. | cat file1 |
| B. | cat > file1 |
| C. | cat < file1 |
| D. | cat |
| Answer» B. cat > file1 | |
| 586. |
What are the files attributes for executing perl programs ? |
| A. | 666 |
| B. | 755 |
| C. | 766 |
| D. | 777 |
| Answer» B. 755 | |
| 587. |
What is default administrator username ? |
| A. | administrator |
| B. | admin |
| C. | superuser |
| D. | root |
| Answer» D. root | |
| 588. |
The name of the Unix scheduling utility is |
| A. | sched |
| B. | cron |
| C. | sc |
| D. | timer |
| Answer» B. cron | |
| 589. |
Examples of repetitive tasks performed by system administrators |
| A. | disk space inventories |
| B. | security audits |
| C. | system backups |
| D. | all of the above |
| Answer» D. all of the above | |
| 590. |
Another term for shell programs is |
| A. | compiled |
| B. | interpreted |
| C. | command processed |
| D. | none of the above |
| Answer» B. interpreted | |
| 591. |
The Unix slang for " #! " is |
| A. | hash-bang |
| B. | shboom |
| C. | shebang |
| D. | more than one of the above |
| Answer» D. more than one of the above | |
| 592. |
Which of the following is not true of program variables |
| A. | can be exported to the entire system |
| B. | can be used only within the shell program |
| C. | can hold data |
| D. | all of the above |
| Answer» C. can hold data | |
| 593. |
Flow control in a shell program allows parts of a shell program to be executed |
| A. | repeatedly |
| B. | conditionally |
| C. | all of the above |
| D. | none of the above |
| Answer» D. none of the above | |
| 594. |
Shell script is preferable to other forms of programming because it |
| A. | makes programming task easier |
| B. | occupies less space |
| C. | enhances portability |
| D. | all of these |
| Answer» D. all of these | |
| 595. |
Choose the incorrect statements. |
| A. | shell scripts can accept arguments |
| B. | shell scipts are interp |
| C. | shell scripts are interpreted |
| D. | shell scripts are compiled |
| Answer» D. shell scripts are compiled | |
| 596. |
Files that store data in the same format as used in program are called |
| A. | binary files |
| B. | executable file |
| C. | source file |
| D. | core |
| Answer» D. core | |
| 597. |
Which of the following file names can be found in more than one directoy? |
| A. | date |
| B. | passwd |
| C. | bin |
| D. | both b and c |
| Answer» D. both b and c | |
| 598. |
Which one of the following options is not a shell in UNIX system? |
| A. | bourne shell |
| B. | c shell |
| C. | net shell |
| D. | korn shel |
| Answer» C. net shell | |
| 599. |
Which command is used to display the top of the file? |
| A. | cat |
| B. | more |
| C. | head |
| Answer» C. head | |
| 600. |
Lint should be used |
| A. | before compilation |
| B. | after compilation |
| C. | to analyze a c code |
| D. | none of the above |
| Answer» A. before compilation | |
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