MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The result of an expression can be assigned to an environement variable with the command |
| A. | assign |
| B. | set |
| C. | env |
| D. | none of the mentioned |
| Answer» C. env | |
| 2. |
Which one of the following GDB command deletes any breakpoint at the next instruction to be executed in the selected stack frame? |
| A. | clear |
| B. | delete |
| C. | disable |
| D. | none of the mentioned |
| Answer» B. delete | |
| 3. |
Which one of the following GDB command allows to move from one stack frame to another without printing the frame? |
| A. | select-frame |
| B. | frame |
| C. | frame move |
| D. | none of the mentioned |
| Answer» B. frame | |
| 4. |
The GDB text user interface uses the ____ library to show the source file. |
| A. | Curses |
| B. | YUI |
| C. | JUI |
| D. | None of the mentioned |
| Answer» B. YUI | |
| 5. |
By default the GDB automatically executes the command from its |
| A. | init files |
| B. | start files |
| C. | begin files |
| D. | none of the mentioned |
| Answer» B. start files | |
| 6. |
The user can define a command for GDB with the command |
| A. | define |
| B. | command |
| C. | assign |
| D. | none of the mentioned |
| Answer» B. command | |
| 7. |
The GDB command “show output-radix” |
| A. | sets the default base for numeric display |
| B. | displays the current default base for numeric display |
| C. | sets the default base |
| D. | none of the mentioned |
| Answer» C. sets the default base | |
| 8. |
The command “show commands” of GDB |
| A. | displays the last 10 commands in the command history |
| B. | displays all commands of the command history |
| C. | displays all the commands available in GDB |
| D. | none of the mentioned |
| Answer» B. displays all commands of the command history | |
| 9. |
Which one of the following command saves the command history of GDB in a file? |
| A. | history |
| B. | set history |
| C. | set history save on |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 10. |
In GDB, a tracepoint can be set by the command |
| A. | trace |
| B. | set |
| C. | break trace |
| D. | none of the mentioned |
| Answer» B. set | |
| 11. |
In GDB hardware-dependent information about the floating point unit can be displayed by the command |
| A. | info float |
| B. | display float |
| C. | show float |
| D. | none of the mentioned |
| Answer» B. display float | |
| 12. |
In GDB, we can refer to machine register contents, in expressions, as variables with names starting with |
| A. | $ |
| B. | # |
| C. | ! |
| D. | none of the mentioned |
| Answer» B. # | |
| 13. |
Which one of the following variables is used within GDB to hold on to a value and refer to it later? |
| A. | convenience variables |
| B. | environment variables |
| C. | temporary variables |
| D. | none of the mentioned |
| Answer» B. environment variables | |
| 14. |
If we want to print the value of a variable in hexadecimal, we have to use “print” command with the option ___ in GDB. |
| A. | x |
| B. | h |
| C. | hex |
| D. | none of the mentioned |
| Answer» B. h | |
| 15. |
In GDB which one of the following allows us to specify a variable in terms of the file or function where it is defined? |
| A. | :: |
| B. | @ |
| C. | $ |
| D. | none of the mentioned |
| Answer» B. @ | |
| 16. |
With the list command, by default GDB prints the ____ source lines. |
| A. | 20 |
| B. | 10 |
| C. | all |
| D. | none of the mentioned |
| Answer» C. all | |
| 17. |
Which one of the following is a special breakpoint that stops the program when the value of an expression changes in GDB? |
| A. | watchpoint |
| B. | catchpoint |
| C. | getpoint |
| D. | none of the mentioned |
| Answer» B. catchpoint | |
| 18. |
Inside GDB, a program may stop because of |
| A. | a signal |
| B. | a breakpoint |
| C. | step command |
| D. | all of the mentioned |
| Answer» E. | |
| 19. |
While debugging with GDB, arguments to the program can be specified by the arguments of _____ command. |
| A. | run |
| B. | gdb |
| C. | make |
| D. | none of the mentioned |
| Answer» B. gdb | |
| 20. |
The execution of the program in GDB can be affected by |
| A. | arguments |
| B. | working directory |
| C. | environment |
| D. | all of the mentioned |
| Answer» E. | |
| 21. |
Assemble code of the program can be displayed in GDB by the command |
| A. | disassemble |
| B. | assemble |
| C. | assembly |
| D. | none of the mentioned |
| Answer» B. assemble | |
| 22. |
Which one of the following is not true about the GDB? |
| A. | info register is used to see that what is in the processor registers |
| B. | processor registers can not be accessed by GDB |
| C. | first 32 bits of the variable can not be examined |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 23. |
Which GDB command is used to examine the memory? |
| A. | x |
| B. | y |
| C. | z |
| D. | none of the mentioned |
| Answer» B. y | |
| 24. |
In GDB breakpoints can be skipped by the command |
| A. | ignore |
| B. | reject |
| C. | skip |
| D. | none of the mentioned |
| Answer» B. reject | |
| 25. |
What is temporary breakpoint? |
| A. | it stops the program once |
| B. | it is removed after one execution of the program |
| C. | it stops the program once & removes after one execution of the program |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 26. |
If we have multiple source files, then during the debugging with GDB |
| A. | breakpoint can not be set |
| B. | break point can be set by “break” command with a filename |
| C. | break point can be set only to makefile |
| D. | none of the mentioned |
| Answer» C. break point can be set only to makefile | |
| 27. |
The GDB command “info local” |
| A. | displays the list of local variables |
| B. | value of local values for the current stack frame |
| C. | displays the list of local variables & value of local values for the current stack frame |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 28. |
GDB command “frame” is used |
| A. | to change the stack frames |
| B. | to check the stack frames only |
| C. | it is not a valid command |
| D. | none of the mentioned |
| Answer» B. to check the stack frames only | |
| 29. |
While debugging with GDB |
| A. | variables can be print |
| B. | variables can be modify |
| C. | variables can be print & modify |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 30. |
Which one of the following is not true about GDB? |
| A. | quit command is used to exit the GDB |
| B. | kill command is used to stop execution in GDB |
| C. | if the execution is stopped by kill command then it can not be started again |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 31. |
We can list all the breakpoint in GDB by the command |
| A. | info break |
| B. | break all |
| C. | both info break and break all |
| D. | none of the mentioned |
| Answer» B. break all | |
| 32. |
To put the breakpoint at the current line ____ command can be used? |
| A. | b |
| B. | break |
| C. | both b and break |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 33. |
Which GDB command can be used to put a breakpoint at the beginning of the program? |
| A. | b main |
| B. | b start |
| C. | break |
| D. | none of the mentioned |
| Answer» B. b start | |
| 34. |
GDB can be used |
| A. | to find out the memory leakages |
| B. | to get the result of a particular expression in a program |
| C. | to find the reason of segementation fault |
| D. | all of the mentioned |
| Answer» E. | |
| 35. |
Which GDB command reloads the debugging information? |
| A. | file |
| B. | reload |
| C. | reload |
| D. | none of the mentioned |
| Answer» B. reload | |
| 36. |
The “step” command of GDB |
| A. | executes the current line of the program |
| B. | stops the next statement to be executed |
| C. | executes the current line of the program & stops the next statement to be executed |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 37. |
The specific break point can be deleted by _____ command in GDB. |
| A. | delete |
| B. | del |
| C. | remove |
| D. | remove |
| Answer» B. del | |
| 38. |
Which GDB command produces a stack trace of the function calls that lead to a segmentation fault? |
| A. | trace |
| B. | backtrace |
| C. | forwardtrace |
| D. | none of the mentioned |
| Answer» C. forwardtrace | |
| 39. |
Which GDB command interrupts the program whenever the value of a variable is modified and prints the value old and new values of the variable? |
| A. | watch |
| B. | show |
| C. | trace |
| D. | none of the mentioned |
| Answer» B. show | |
| 40. |
Which GDB command prints the value of a variable in hex. |
| A. | print/x |
| B. | print/h |
| C. | print/e |
| D. | none of the mentioned |
| Answer» B. print/h | |
| 41. |
To print the value of a variable while debugging with GDB, ______ command can be used |
| A. | printf |
| B. | |
| C. | show |
| D. | none of the mentioned |
| Answer» C. show | |
| 42. |
At the time of debugging with GDB, if we just press ENTER |
| A. | GDB will repeat the same command you just gave it |
| B. | GDB will do nothing |
| C. | GDB will exit |
| D. | None of the mentioned |
| Answer» B. GDB will do nothing | |
| 43. |
In GDB debugging, we can proceed to the next breakpoint with command |
| A. | next |
| B. | continue |
| C. | both next and continue |
| D. | none of the mentioned |
| Answer» C. both next and continue | |
| 44. |
In debugging with GDB, break points can be set to |
| A. | any line |
| B. | any function |
| C. | both any line and function |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 45. |
The command “gdb sanfoundy” |
| A. | will start debugging for the file “sanfoundry” if the file is compiled with -g option with GCC |
| B. | will create executable for debugging |
| C. | will provide all errors present in the file “sanfoundry” |
| D. | none of the mentioned |
| Answer» B. will create executable for debugging | |
| 46. |
GDB can be used for |
| A. | c language |
| B. | c++ language |
| C. | both c and c++ language |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 47. |
GDB stands for |
| A. | GNU debugger |
| B. | General debugging breakpoint |
| C. | General debugger |
| D. | None of the mentioned |
| Answer» B. General debugging breakpoint | |
| 48. |
In GDB, breakpoints can be set by the command |
| A. | break |
| B. | b |
| C. | both break and b |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 49. |
For debugging with GDB, the compiled program can be run by the command |
| A. | run |
| B. | execute |
| C. | ./<filename> |
| D. | none of the mentioned |
| Answer» B. execute | |
| 50. |
Which command can be used to update the shared library system? |
| A. | lconfig |
| B. | ldconfig |
| C. | slconfig |
| D. | none of the mentioned |
| Answer» C. slconfig | |