Operating System MCQ (Multiple Choice Questions) - SchoolingAxis

Operating System MCQ (Multiple Choice Questions)

 Que- 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- Documentation increases the maintenance time and cost        


Que- The system/370 assembler language 

a. allows the programmer to write base registers and displacements explicitly in the source program. 

b. is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain. 

c. allows multiple programs to reside in separate areas of core at the same time. 

d. is a term that refers to the control programs of an operating system. 


Answer- allows the programmer to write base registers and displacements explicitly in the source program.        


Que- The errors that can be pointed out by the compiler are 

a. Syntax errors 

b. Semantic errors 

c. Logical errors 

d. Internal errors 


Answer- Syntax errors        


Que- When a computer is first turned on or restarted, a special type of absolute loader is executed, called a 

a. ""Compile and Go"" loader 

b. Boot loader 

c. Bootstrap loader 

d. Relating loader 


Answer- Bootstrap loader        


Que- 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- Syntax check        


Que- A program that converts a high-level language program to a set of instructions that can run on a computer is called a 

a. Compiler 

b. Debugger 

c. Editor 

d. All of the above 


Answer- Compiler        


Que- Which of the following is characteristic of an operating system? 

a. resource management 

b. error recovery 

c. memory management 

d. All the above 


Answer- All the above        


Que- Virtual Memory 

a. is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks. 

b. consists of those addresses that may be generated by a processor during execution of a computation. 

c. is a method of allocating processor time. 

d. allows multiple programs to reside in separate areas of core at the time. 


Answer- consists of those addresses that may be generated by a processor during execution of a computation.        


Que- In a magnetic disk, data is recorded in a set of concentric tracks which are subdivided into 

a. periods 

b. sectors 

c. zones 

d. groups 


Answer- sectors        


Que- The total time to prepare a disk drive mechanism for a block of data to be read from it is 

a. latency 

b. latency plus transmission time 

c. latency plus seek time 

d. latency   plus   seek   time   plus transmission time 


Answer- latency plus seek time        


Que- Part of a program where the shared memory is accessed and which should be executed invisibly, is called 

a. semaphores 

b. directory 

c. critical section 

d. mutual exclusion 


Answer- critical section        


Que- Indicate which, of the following, is not true about Nassi-Shneiderman charts 

a. These charts are type of graphical design tool 

b. These charts cannot represent CASE constructs 

c. These charts can represent three fundamental control structures 

d. All of the above 


Answer- These charts cannot represent CASE constructs        


Que- Access time is the highest in the case of 

a. floppy disk 

b. cache 

c. swapping devices 

d. magnetic disk 


Answer- magnetic disk        


Que- Which of the following is not a characteristic of a daisy chaining priority control scheme? 

a. priority is programmable 

b. it is relatively easy to add more devices to the chain 

c. the failure of one device may affect other devices on the chain 

d. the number of control lines is independent of the number of devices on the chain 


Answer- priority is programmable        


Que- Assembler is 

a. a program that places programs into memory and prepares them for execution. 

b. a program that automate the translation of assembly language into machine language. 

c. a program that accepts a program written in a high level language and produces an object program. 

d. is a program that appears to execute a source program as if it were machine language. 


Answer- a program that automate the translation of assembly language into machine language.        


Que- Indicate which, of the following, in not true about an interpreter 

a. Interpreter generates an object program from the source program 

b. Interpreter is a kind of translator 

c. Interpreter analyses each source statement every time it is to be executed 

d. All of the above 


Answer- Interpreter generates an object program from the source program        


Que- Object modules generated by assemblers that contain unresolved external references are resolved for two or more object modules by a/an 

a. operating system 

b. loader 

c. linker 

d. compiler 


Answer- linker        


Que- The dispatcher 

a. actually schedules the tasks into the processor 

b. puts tasks in I/O wait 

c. is always small and simple 

d. never changes task priorities 


Answer- actually schedules the tasks into the processor        


Que- System programs such as Compilers are designed so that they are 

a. reenterable 

b. non reusable 

c. serially usable 

d. recursive 


Answer- reenterable        


Que- 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- CP/M        


Que- If the number of bits in a virtual address of a program is 16 and the page size is 0.5 K bytes, the number of pages in the virtual address space is 

a. 16 

b. 32 

c. 64 

d. 128 


Answer- 128        


Que- Which table is a permanent database that has an entry for each terminal symbol. 

a. Terminal table 

b. Literal table 

c. Identifier table 

d. Reductions 


Answer- Terminal table        


Que- Which of the following statement is true. 

a. The LRU algorithm pages out pages that have been used recently 

b. Thrashing is a natural consequence of virtual memory systems. 

c. Seek analysis is used for analysing control-unit busy problems. 

d. All of the above 


Answer- Seek analysis is used for analysing control-unit busy problems.        


Que- 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- Both of the above        


Que- Which are the most important features of Microsoft Windows program? 

a. Windows 

b. Pull-down menus 

c. Icons 

d. All of the above 


Answer- All of the above        


Que- Which of the following system program forgoes the production of object code to generate absolute machine code and load it into the physical main storage location from which it will be executed immediately upon completion of the assembly? 

a. two pass assembler 

b. load-and-go assembler 

c. macroprocessor 

d. compiler 


Answer- load-and-go assembler        


Que- 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- used in all major commercial operating systems        


Que- Scheduling is 

a. allowing    jobs    to    use    the processor 

b. unrelated to performance consideration 

c. not   required   in   uniprocessor systems 

d. the   same   regard-less   of   the purpose of the system 


Answer- allowing    jobs    to    use    the processor        


Que- What scheduling algorithm allows processes that are logical runnable to be temporarily suspended? 

a. preemptive scheduling 

b. non-preemptive scheduling 

c. FIFO 

d. FCFS 


Answer- preemptive scheduling        


Que- In an absolute loading scheme, which loader function is accomplished by loader 

a. Reallocation 

b. Allocation 

c. Linking 

d. Loading 


Answer- Loading        


Que- The computational technique used to compute the disk storage address of individual records is called: 

a. bubble memory 

b. key fielding 

c. dynamic reallocation 

d. hashing 


Answer- hashing        


Que- 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- 2        


Que- In virtual memory systems, Dynamic address translation 

a. is  the  hardware  necessary  to implement paging 

b. stores pages at a specific location on disk 

c. is useless when swapping is used 

d. is part of the operating system paging algorithm 


Answer- is  the  hardware  necessary  to implement paging        


Que- Fragmentation of the file system 

a. occurs only if the file system is used improperly 

b. can always be prevented 

c. can be temporarily removed by compaction 

d. is a characteristic of all file systems 


Answer- can be temporarily removed by compaction        


Que- A non-relocatable program is one which 

a. cannot be made to execute in any area of storage other than the one designated for it at the time of its coding or translation. 

b. consists of a program and relevant information for its relocation. 

c. can itself performs the relocation of its address-sensitive portions. 

d. all of the above 


Answer- cannot be made to execute in any area of storage other than the one designated for it at the time of its coding or translation.        


Que- Which of the following are(is) Language Processor(s) 

a. assembles 

b. compilers 

c. interpreters 

d. All of the above 


Answer- All of the above        


Que- In which addressing mode the effective address of the operand is the contents of a register specified in the instruction and after accessing the operand, the contents of this register is incremented to point to the next item in the list? 

a. index addressing 

b. indirect addressing 

c. auto increment 

d. auto decrement 


Answer- auto increment        


Que- The practice of ""bundling"" refers to 

a. selling computers alone 

b. selling peripheral devices with computer 

c. selling software to run on computers 

d. giving  away  software  with  a computer purchase 


Answer- giving  away  software  with  a computer purchase        


Que- Special software to create a job queue is called a 

a. Drive 

b. Spooler 

c. Interpreter 

d. Linkage editor 


Answer- Spooler        


Que- All the time a computer is switched on, its operating system software has to stay in 

a. main storage 

b. primary storage 

c. floppy disk 

d. disk drive 


Answer- primary storage        


Que- 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- All of the above        


Que- Which of the following is not an advantage of multiprogramming? 

a. increased throughput 

b. shorter response time 

c. decreased operating-system overhead 

d. ability to assign priorities to jobs 


Answer- decreased operating-system overhead        


Que- In analyzing the compilation of PL/I program, the term ""Syntax analysis"" is associated with 

a. recognition of basic syntactic constructs through reductions. 

b. recognition of basic elements and creation of uniform symbols 

c. creation of more optional matrix. 

d. use of macro processor to produce more optimal assembly code 


Answer- recognition of basic syntactic constructs through reductions.        


Que- A hardware device that is capable of executing a sequence of instructions, is known as 

a. CPU 

b. ALU 

c. CU 

d. Processor 


Answer- Processor        


Que- 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- The program is much easier to change        


Que- 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- All of the above        


Que- A compiler for a high-level language that runs on one machine and produces code for a different machine is called is 

a. optimizing compiler 

b. one pass compiler 

c. cross compiler 

d. multipass compiler 


Answer- cross compiler        


Que- A sequence of instructions, in a computer language, to get the desired result, is known as 

a. Algorithm 

b. Decision Table 

c. Program 

d. All of the above 


Answer- Program        


Que- Which, of the following, is true for testing and debugging? 

a. Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program 

b. Testing detects the syntax errors in the program while debugging corrects those errors in the program 

c. Testing and debugging indicate the same thing 

d. All of the above 


Answer- Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program        


Que- Information in a memory that is no longer valid or wanted is known as 

a. non-volatile 

b. volatile 

c. surplus 

d. garbage 


Answer- garbage        


Que- Which of the following filename extension suggests that the file is a backup copy of another file? 

a. TXT 

b. COM 

c. BAS 

d. BAK 


Answer- BAK        


Que- Relocation bits used by relocating loader are specified (generated) by 

a. Relocating loader itself 

b. Linker 

c. Assembler or translator 

d. Macro processor 


Answer- Linker        


Que- Backups should be done 

a. daily for most installations 

b. weekly for most installations 

c. as several image copies, followed by an incremental 

d. as several incrementals, followed by an image copy 


Answer- as several incrementals, followed by an image copy        


Que- In an absolute loading scheme, which loader function is accomplished by assembler. 

a. Reallocation 

b. Allocation 

c. Linking 

d. Loading 


Answer- Reallocation        


Que- The command interpreter 

a. is usually the primary user interface 

b. requires fixed format commands 

c. is menu drive 

d. is quite different from the SCL interpreter 


Answer- is usually the primary user interface        


Que- A task in a blocked state 

a. is executable 

b. is running 

c. must still be placed in the run queues 

d. is waiting for same temporarily unavailable resources 


Answer- is waiting for same temporarily unavailable resources        


Que- 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- is necessary on all systems, regardless of how good        


Que- Which of the following statements is false? 

a. a process scheduling algorithm is preemptive if the CPU can be forcibly removed from a process 

b. time sharing systems generally use preemptive CPU scheduling 

c. response time are more predictable in preemptive systems than in non preemptive systems 

d. real time systems generally use non-preemptive CPU scheduling 


Answer- real time systems generally use non-preemptive CPU scheduling        


Que- Nonmodifiable procedures are called 

a. serially usable procedures 

b. concurrent procedures 

c. reentrant procedures 

d. topdown procedures 


Answer- reentrant procedures        


Que- 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- is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.        


Que- Which of the following scheduling objectives should be applied to the following: the system should admit jobs to create a mix that will keep most devices busy 

a. to be fair 

b. to balance resource utilization 

c. to obey priorities 

d. to be predictable 


Answer- to balance resource utilization        


Que- Multiprogramming systems: 

a. are easier to develop than single programming system 

b. execute each job faster 

c. execute more jobs in the same time period 

d. are used only on large mainframe computers 


Answer- execute more jobs in the same time period        


Que- A critical region is 

a. a program segment that has not been proved bug-free 

b. a program segment that often causes unexpected system crashes 

c. a program segment where shared resources are accessed 

d. one which is enclosed by a pair of P and V operations on semaphores 


Answer- one which is enclosed by a pair of P and V operations on semaphores        


Que- Assembler language 

a. is usually the primary user interface 

b. requires fixed-format commands 

c. is a mnemonic form of machine language 

d. is quite different from the SCL interpreter 


Answer- is a mnemonic form of machine language        


Que- The primary job of the operating system of a computer is to 

a. command resources 

b. manage resources 

c. provide utilities 

d. be user friendly 


Answer- manage resources        


Que- Which of the following is a measure to test how good or bad a modular design is 

a. Module strength 

b. Module coupling 

c. Static analysis 

d. All of the above 


Answer- Module strength        


Que- The Operating system manages 

a. Memory 

b. Processor 

c. Disks and I/O devices 

d. All of the above 


Answer- All of the above        


Que- The higher versions of the operating systems are so written that programs designed for earlier versions can still be run. What is it called? 

a. Upgradability 

b. Upward mobility 

c. Universality 

d. Upward compatibility 


Answer- Upward compatibility        


Que- 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- JCL        


Que- Which policy replace a page if it is not in the favoured subset of a process's pages? 

a. FIFO 

b. LRU 

c. LFU 

d. Working set 


Answer- Working set        


Que- Which of the following can be accesses by transfer vector approach of linking? 

a. External data segments 

b. External subroutines 

c. Data located in other procedures 

d. All of the above 


Answer- External subroutines        


Que- Which of the following terms refers to the degree to which data in a database system are accurate and correct? 

a. data security 

b. data validity 

c. data independence 

d. data integrity 


Answer- data integrity        


Que- Which of the following statements is not true about the FORTRAN language? 

a. FORTRAN is a high level language 

b. A FORTRAN program, written for the IBM-PC, is totally different from a FORTRAN program written for execution on the SUN machine 

c. FORTRAN is extensively used to write programs for performing scientific computations 

d. All of the above 


Answer- A FORTRAN program, written for the IBM-PC, is totally different from a FORTRAN program written for execution on the SUN machine        


Que- A linker 

a. creates a load module 

b. is not necessary with variable partitions 

c. must be run after the loader 

d. is   not   needed   with   a   good compiler 


Answer- creates a load module        


Que- Uniform Symbols Table 

a. contains all constants in the program 

b. a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure. 

c. consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis  and  used  for  syntax analysis and interpretation 

d. a permanent table which lists all key words and special symbols of the language in symbolic form. 


Answer- consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis  and  used  for  syntax analysis and interpretation        


Que- In which of the storage placement strategies a program is placed in the smallest available hole in the main memory? 

a. best fit 

b. first fit 

c. worst fit 

d. buddy 


Answer- best fit        


Que- In which addressing mode, the effective address of the operand is generated by adding a constant value to the contents of register? 

a. absolute mode 

b. indirect mode 

c. immediate mode 

d. index mode 


Answer- index mode        


Que- The primary purpose of an operating system is to: 

a. make computer easier to use 

b. keep system programmers employed 

c. make the most efficient use of the hardware 

d. allow people to sue the computers 


Answer- make computer easier to use        


Que- The principles of structured programming forbid the use of 

a. WHILE-DO 

b. GOTO 

c. IF-THEN-ELSE 

d. DO-WHILE 


Answer- GOTO        


Que- 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- multitasking        

Previous Post Next Post

Responsive Ad