MCQOPTIONS
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MCQOPTIONS
This section includes 227 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Job Control Language (JCL) statements are used to |
| A. | Read the input from the slow-speed card reader to the high-speed magnetic disk |
| B. | Specify, to the operating system, the beginning and end of a job in a batch |
| C. | Allocate the CPU to a job |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Allocate the CPU to a job | |
| 2. |
Multiprogramming systems: |
| A. | to balance resource utilization |
| B. | to obey priorities |
| C. | to be predictable |
| D. | None of the above |
| Answer» D. None of the above | |
| 3. |
Object modules generated by assemblers that contain unresolved external references are resolved for two or more object modules by a/an |
| A. | Interpreter is a kind of translator |
| B. | Interpreter analyses each source statement every time it is to be executed |
| C. | All of the above |
| D. | None of the above |
| Answer» D. None of the above | |
| 4. |
Software that measures, monitors, analyzes, and controls real-world events is called: |
| A. | provides a layered, user-friendly interface |
| B. | enables the programmer to draw a flowchart |
| C. | all of the above |
| D. | None of the above |
| Answer» C. all of the above | |
| 5. |
The instruction register |
| A. | is a hardware memory device which denotes the location of the current instruction being executed. |
| B. | is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory. |
| C. | contains the address of the memory location that is to be read from or stored into. |
| D. | contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write". |
| Answer» C. contains the address of the memory location that is to be read from or stored into. | |
| 6. |
In which way(s) a macro processor for assembly language can be implemented: |
| A. | independent two-pass processor |
| B. | independent one-pass processor |
| C. | processor incorporated into pass 1 of a standard two-pass assembler |
| D. | all of the above |
| Answer» E. | |
| 7. |
Which of the following is true about pseudocode |
| A. | A machine language |
| B. | An assembly language |
| C. | A high-level language |
| D. | All of the above |
| Answer» E. | |
| 8. |
What is the initial value of the semaphore to allow only one of the many processes to enter their critical section? |
| A. | 8 |
| B. | 1 |
| C. | 16 |
| D. | 0 |
| Answer» C. 16 | |
| 9. |
In analyzing the compilation of PL/I program, the description "creation of more optimal matrix" is associated with |
| A. | Assembly and output |
| B. | Code generation |
| C. | Syntax analysis |
| D. | Machine independent optimization |
| Answer» E. | |
| 10. |
The Operating system manages |
| A. | Memory |
| B. | Processor |
| C. | Disks and I/O devices |
| D. | All of the above |
| Answer» E. | |
| 11. |
The main function of the dispatcher (the portion of the process scheduler) is |
| A. | swapping a process to the disk |
| B. | assigning ready process to the CPU |
| C. | suspending some of the processes when the CPU load is high |
| D. | bring processes from the disk to the main memory |
| Answer» C. suspending some of the processes when the CPU load is high | |
| 12. |
Operating system |
| A. | links a program with the subroutines it references |
| B. | provides a layered, user-friendly interface |
| C. | enables the programmer to draw a flowchart |
| D. | all of the above |
| Answer» C. enables the programmer to draw a flowchart | |
| 13. |
Which are the most important features of Microsoft Windows program? |
| A. | Windows |
| B. | Pull-down menus |
| C. | Icons |
| D. | All of the above |
| Answer» E. | |
| 14. |
The state transition initiated by the user process itself in an operating system is |
| A. | block |
| B. | dispatch |
| C. | wake up |
| D. | timer run out |
| Answer» B. dispatch | |
| 15. |
System maintenance: |
| A. | is usually not necessary |
| B. | is necessary on all systems, regardless of how good |
| C. | is not required if the system is well written |
| D. | always requires several programs |
| Answer» C. is not required if the system is well written | |
| 16. |
Block or buffer caches are used |
| A. | to improve disk performance |
| B. | to handle interrupts |
| C. | to increase the capacity of main memory |
| D. | to speed up main memory read operation |
| Answer» B. to handle interrupts | |
| 17. |
IBM released its first PC in 1981. Can you name the operating system which was most popular at that time? |
| A. | MS-DOS |
| B. | PC-DOS |
| C. | OS/360 |
| D. | CP/M |
| Answer» E. | |
| 18. |
Indicate which is a pre-emptive scheduling algorithm |
| A. | Round-robin |
| B. | Shortest-job-next |
| C. | Priority-based |
| D. | All of the above |
| Answer» B. Shortest-job-next | |
| 19. |
What is the name given to all the programs inside the computer with makes it usable? |
| A. | Application software |
| B. | System software |
| C. | Firm ware |
| D. | Shareware |
| Answer» C. Firm ware | |
| 20. |
A Processor |
| A. | is a device that performs a sequence of operations specified by instructions in memory. |
| B. | is the device where information is stored |
| C. | is a sequence of instructions |
| D. | is typically characterized by interactive processing and time of the CPU's time to allow quick response to each user. |
| Answer» B. is the device where information is stored | |
| 21. |
The advantage(s) inherent to using high level languages is (are) |
| A. | Fewer people, less management and shorter transition in learning time |
| B. | Improved debugging capability, and superior documentation |
| C. | A greater degree of machine independence |
| D. | All of the above |
| Answer» E. | |
| 22. |
In which addressing mode, the address of the location of the operand is given explicitly as a part of the instruction. |
| A. | absolute mode |
| B. | immediate mode |
| C. | index mode |
| D. | modulus mode |
| Answer» B. immediate mode | |
| 23. |
The disadvantages of "Compile and Go" loading scheme is (are): |
| A. | a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program. |
| B. | it is necessary to retranslate the user's program deck every time it is run. |
| C. | it is very difficult to handle multiple segments, especially if the source programs are in different languages, and to produce orderly modular programs. |
| D. | all of the above |
| Answer» E. | |
| 24. |
Which, of the following is not true about the description of a decision table? |
| A. | A decision table is easy to modify |
| B. | A decision table is directly understood by the computer |
| C. | A decision table is easy to understand |
| D. | All of the above |
| Answer» C. A decision table is easy to understand | |
| 25. |
Producer consumer problem can be solved using |
| A. | semaphores |
| B. | event counters |
| C. | monitors |
| D. | all of the above |
| Answer» E. | |
| 26. |
Virtual memory is |
| A. | simple to implement |
| B. | used in all major commercial operating systems |
| C. | less efficient in utilization of memory |
| D. | useful when fast I/O devices are not available |
| Answer» C. less efficient in utilization of memory | |
| 27. |
For how many processes which are sharing common data, the Dekker's algorithm implements mutual exclusion? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 28. |
Which of the following capabilities is required for a system program to execute more than one program at a time? |
| A. | word processing |
| B. | compiling |
| C. | virtual memory |
| D. | multitasking |
| Answer» E. | |
| 29. |
Swapping |
| A. | works best with many small partitions |
| B. | allows many programs to use memory simultaneously |
| C. | allows each program in turn to use the memory |
| D. | does not work with overlaying |
| Answer» D. does not work with overlaying | |
| 30. |
Under multiprograming, turnaround time for short jobs is usually _____ and that for long jobs is slightly _____. |
| A. | lengthened; shortened |
| B. | shortened; lengthened |
| C. | shortened; shortened |
| D. | lengthened; lengthened |
| Answer» C. shortened; shortened | |
| 31. |
Which, of the following checks, cannot be carried out on the input data to a system? |
| A. | consistency check |
| B. | Syntax check |
| C. | Range check |
| D. | All of the above |
| Answer» C. Range check | |
| 32. |
The SJF algorithm executes first the job |
| A. | that last entered the queue |
| B. | that first entered the queue |
| C. | that has been in the queue the longest |
| D. | with the least processor needs |
| Answer» E. | |
| 33. |
A public key encryption system |
| A. | allows anyone to decode the transmission |
| B. | allows only the correct sender to decode the data |
| C. | allows only the correct receiver to decode the data |
| D. | does not encode the data before transmitting it |
| Answer» D. does not encode the data before transmitting it | |
| 34. |
A hardware device that is capable of executing a sequence of instructions, is known as |
| A. | CPU |
| B. | ALU |
| C. | CU |
| D. | Processor |
| Answer» E. | |
| 35. |
Under virtual storage, |
| A. | a single program is processed by two or more CPUs |
| B. | two or more programs are stored concurrently in primary storage |
| C. | only the active pages of a program are stored in primary storage |
| D. | interprogram interference may occur |
| Answer» D. interprogram interference may occur | |
| 36. |
Which of the following is not applications software? |
| A. | Word processing |
| B. | Spreadsheet |
| C. | UNIX |
| D. | Desktop publishing |
| Answer» D. Desktop publishing | |
| 37. |
What is the name of the operating system which was originally designed by scientists and engineers for use by scientists and engineers? |
| A. | XENIX |
| B. | UNIX |
| C. | OS/2 |
| D. | MS DOS |
| Answer» C. OS/2 | |
| 38. |
The advantage(s) of incorporating the macro processor into pass 1 is(are): |
| A. | many functions do not have to be implemented twice. |
| B. | Functions are combined and it is not necessary to create intermediate files as output from the macros processor and input to the assembler. |
| C. | more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros. |
| D. | all of the above |
| Answer» E. | |
| 39. |
Relocation bits used by relocating loader are specified (generated) by |
| A. | Relocating loader itself |
| B. | Linker |
| C. | Assembler or translator |
| D. | Macro processor |
| Answer» C. Assembler or translator | |
| 40. |
The most common systems security method is |
| A. | passwords |
| B. | encryption |
| C. | firewall |
| D. | all of the above |
| Answer» B. encryption | |
| 41. |
Which of the following is not true about documentation? |
| A. | Documentation, of a system, should be as clear and direct as possible |
| B. | Documentation increases the maintenance time and cost |
| C. | Documentation gives better understanding of the problem |
| D. | All of the above |
| Answer» C. Documentation gives better understanding of the problem | |
| 42. |
Special software to create a job queue is called a |
| A. | Drive |
| B. | Spooler |
| C. | Interpreter |
| D. | Linkage editor |
| Answer» C. Interpreter | |
| 43. |
Which of the following is a phase of a compilation process |
| A. | Lexical analysis |
| B. | Code generation |
| C. | Both of the above |
| D. | Static analysis |
| Answer» D. Static analysis | |
| 44. |
What is the name given to the software which can be legally compiled and often used for free? |
| A. | Shareware program |
| B. | Public domain program |
| C. | Firmware program |
| D. | Mindware |
| Answer» C. Firmware program | |
| 45. |
Can you name of the major Operating System used in computers? |
| A. | MS DOS |
| B. | OS/2 |
| C. | UNIX |
| D. | All of the above |
| Answer» E. | |
| 46. |
Scissoring enables |
| A. | a part of data to be displayed |
| B. | entire data to be displayed |
| C. | full data display on full area of screen |
| D. | no data to be displayed |
| Answer» B. entire data to be displayed | |
| 47. |
An incremental backup |
| A. | should be done each month |
| B. | uses more tapes |
| C. | saves all files |
| D. | saves only files that have recently changed |
| Answer» E. | |
| 48. |
The function(s) performed by the paging software is (are) |
| A. | Implementation of the access environment for all programs in the system |
| B. | Management of the physical address space |
| C. | Sharing and protection |
| D. | All of the above |
| Answer» E. | |
| 49. |
Which of following is/are the advantage(s) of modular programming? |
| A. | The program is much easier to change |
| B. | Modules can be reused in other programs |
| C. | Easy debugging |
| D. | Easy to compile |
| Answer» B. Modules can be reused in other programs | |
| 50. |
If special forms are needed for printing the output, the programmer specifies these forms through? |
| A. | JCL |
| B. | JPL |
| C. | Utility programs |
| D. | Load modules |
| Answer» B. JPL | |