Multiple Choice Questions and Answers
Question 1 : Moving a process from main memory to the disk is called as
(a) Scheduling
(b) Caching
(c) Swapping
(d) Spooling
Answer : (c)
Question 2 : A special purpose register that is set to the highest address occupied by the OS code is
(a) Fence Register
(b) General Purpose Register
(c) Protection Register
(d) None of the above
Answer : (a)
Question 3 : Symbolic addresses are also known as
(a) Physical addresses
(b) Far addresses
(c) Virtual addresses
(d) None of the above
Answer : (c)
Question 4 : CPU generates
(a) Logical addresses
(b) Physical addresses
(c) Relocatable addresses
(d) None of the above
Answer : (a)
Question 5 : The process of mapping of local addresses to real physical addresses is known as –
(a) Address Scheme
(b) Addressing Modes
(c) Address Binding
(d) None of the above
Answer : (c)
Question 6 : The address binding for global variables occurs at –
(a) Run-time
(b) Load-time
(c) Compile time
(d) None of the above
Answer : (b)
Question 7 : An effective physical address is given by the formula
(a) Effective physical address = logical address / (contents of Relocation Register)
(b) Effective physical address = logical address * (contents of Relocation Register)
(c) Effective physical address = logical address + (contents of Relocation Register)
(d) None of the above
Answer : (c)
Question 8 : MMU stands for
(a) Main Memory Unit
(b) Memory Management Unit
(c) Main Management Unit
(d) None of the above
Answer : (b)
Question 9 : Logical memory is divided into
(a) Pages
(b) Frames
(c) Partitions
(d) None of the above
Answer : (a)
Question 10 : The page size and frame size must be
(a) Equal
(b) Unequal
(c) Multiples of each other
(d) None of the above
Answer : (a)
Question 11 : Sharing is possible in which technique
(a) Paging
(b) Segmentation
(c) Both ‘a’ and ‘b’
(d) None of the above
Answer : (c)
Question 12 : Which of the following statements is false
(a) A small page size causes large page tables
(b) Internal fragmentation is increased with small pages
(c) A large page size causes instructions and data that will not be referenced
(d) I/O transfers are more efficient with large pages
Answer : (b)
Question 13 : The problem of fragmentation arises in
(a) Static storage allocation
(b) Stack allocation of storage
(c) Stack allocation with dynamic binding
(d) Heap allocation
Answer : (d)
Question 14 : Which of the following scheme suffers from External fragmentation
(a) Segmentation
(b) Paging
(c) Paged Segmentation
(d) All of the above
Answer : (a)
Question 15 : The worst fit algorithm
(a) Is used only when nothing better is available
(b) Is to place program in largest available partition
(c) Should never be used
(d) Places a program in the smallest possible partition
Answer : (b)